From nobody Fri Jan 2 03:36:34 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8588C1A1A04 for ; Fri, 2 Jan 2015 03:36:32 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -5.002 X-Spam-Level: X-Spam-Status: No, score=-5.002 tagged_above=-999 required=5 tests=[BAYES_40=-0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bwcqdiT1MJWj for ; Fri, 2 Jan 2015 03:36:30 -0800 (PST) Received: from demumfd002.nsn-inter.net (demumfd002.nsn-inter.net [93.183.12.31]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7B6771A0406 for ; Fri, 2 Jan 2015 03:36:30 -0800 (PST) Received: from demuprx017.emea.nsn-intra.net ([10.150.129.56]) by demumfd002.nsn-inter.net (8.14.3/8.14.3) with ESMTP id t02BaQgU030357 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 2 Jan 2015 11:36:26 GMT Received: from DEMUHTC001.nsn-intra.net ([10.159.42.32]) by demuprx017.emea.nsn-intra.net (8.12.11.20060308/8.12.11) with ESMTP id t02BaNF2020692 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Fri, 2 Jan 2015 12:36:23 +0100 Received: from DEMUMBX014.nsn-intra.net ([169.254.14.60]) by DEMUHTC001.nsn-intra.net ([10.159.42.32]) with mapi id 14.03.0195.001; Fri, 2 Jan 2015 12:36:23 +0100 From: "Wiehe, Ulrich (NSN - DE/Munich)" To: "ext TROTTIN, JEAN-JACQUES (JEAN-JACQUES)" , "dime@ietf.org list" Thread-Topic: [Dime] DOIC WGLC: Editorial Comments Thread-Index: AQHQGaX2Cq39JOoBT0+v5wTnl9k+LZyT6HGAgAgeI4CAELr2wA== Date: Fri, 2 Jan 2015 11:36:22 +0000 Message-ID: <5BCBA1FC2B7F0B4C9D935572D90006681523C14B@DEMUMBX014.nsn-intra.net> References: <79E0AA6A-8F91-45FD-AE8A-EFF9D2A4E9D3@nostrum.com> <5491AEC7.8070307@usdonovans.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.159.42.101] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-purgate-type: clean X-purgate-Ad: Categorized by eleven eXpurgate (R) http://www.eleven.de X-purgate: clean X-purgate: This mail is considered clean (visit http://www.eleven.de for further information) X-purgate-size: 1257 X-purgate-ID: 151667::1420198586-00001177-37EA8A06/0/0 Archived-At: http://mailarchive.ietf.org/arch/msg/dime/KHsHUA1ljGYRjvGEIgrHOMwSyjE Subject: Re: [Dime] DOIC WGLC: Editorial Comments X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 02 Jan 2015 11:36:32 -0000 -- 4.1.3, para 9: "ambiguity" I'm not sure that's is the word we want here. An agent could muck things up= without being ambiguous. Perhaps "inconsistency"?=20 SRD> The point is that the reacting nodes and reporting nodes must unambiguously know what to do. I think ambiguous is the right word Ben> I can construct behavior that is not ambiguous to upstream or downstre= am nodes, but still breaks normative requirements. How about " ... ensure t= hat it does not introduce incorrect behavior for either the upstream or dow= nstream DOIC nodes." JJ> as Ben, ambiguity is not so right.=20 A proposal: "When making changes to the OC-Supported-Features or OC-OLR AVP= s, the Diameter Agent needs to ensure consistency in its behavior with bot= h upstream and downstream DOIC nodes". Ulrich> I agree with SRD. The ambiguity (in DOIC behavior for e.g. a reacti= ng node) that needs to be avoided may result from an agent on path1 between= client and server that makes changes to OC-Supported-Features within answe= rs while other agents on other paths between client and server make no or d= ifferent changes. The reacting node (client) would get mixed signals depend= ing on the path taken, resulting in ambiguity. =09 From nobody Sun Jan 4 09:38:31 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 08A911A8A04 for ; Sun, 4 Jan 2015 09:38:27 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.209 X-Spam-Level: X-Spam-Status: No, score=-4.209 tagged_above=-999 required=5 tests=[BAYES_50=0.8, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id IVR2qazphrn3 for ; Sun, 4 Jan 2015 09:38:17 -0800 (PST) Received: from smtp-fr.alcatel-lucent.com (fr-hpida-esg-02.alcatel-lucent.com [135.245.210.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id CFE5E1A89B9 for ; Sun, 4 Jan 2015 09:38:16 -0800 (PST) Received: from fr712usmtp2.zeu.alcatel-lucent.com (unknown [135.239.2.42]) by Websense Email Security Gateway with ESMTPS id 831DDDC34020E for ; Sun, 4 Jan 2015 17:38:10 +0000 (GMT) Received: from FR711WXCHHUB01.zeu.alcatel-lucent.com (fr711wxchhub01.zeu.alcatel-lucent.com [135.239.2.111]) by fr712usmtp2.zeu.alcatel-lucent.com (GMO) with ESMTP id t04HcD86005294 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Sun, 4 Jan 2015 18:38:14 +0100 Received: from FR712WXCHMBA12.zeu.alcatel-lucent.com ([169.254.8.50]) by FR711WXCHHUB01.zeu.alcatel-lucent.com ([135.239.2.111]) with mapi id 14.03.0195.001; Sun, 4 Jan 2015 18:38:13 +0100 From: "TROTTIN, JEAN-JACQUES (JEAN-JACQUES)" To: "dime@ietf.org" Thread-Topic: Diameter load control inputs Thread-Index: AdAoRTX1mtXcCV8gROKEYHqQd0nf8g== Date: Sun, 4 Jan 2015 17:38:12 +0000 Message-ID: Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [135.239.27.41] Content-Type: multipart/alternative; boundary="_000_E194C2E18676714DACA9C3A2516265D2026F4908FR712WXCHMBA12z_" MIME-Version: 1.0 Archived-At: http://mailarchive.ietf.org/arch/msg/dime/IaELPJ21UNWgC-WxAoqk0LR-svY Subject: [Dime] Diameter load control inputs X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 04 Jan 2015 17:38:27 -0000 --_000_E194C2E18676714DACA9C3A2516265D2026F4908FR712WXCHMBA12z_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dear all I first wish you a happy new year for you and your family as well in your= professional life. I hereafter address our new topic on Diameter load control. I am in favor to continue the work that Ben has covered in his "draft-campb= ell-dime-load-considerations-00" document, by adding, investigating various= considerations. I hereafter give several additional section parts or paragraphs that I thi= nk could be inserted in Ben's draft. I have put some titles and numbering (= #L1, #L2 ...) to reuse in separated email treads for discussion. I have included topology use cases. For Diameter overload, Steve did sever= al presentations on the various use cases to consider. I think also good = to do the same for Diameter load, and to insert such use cases in the Ben's= draft. You may consider this list somewhat long but these use cases highli= ght a certain number of points for which we will have to take some decision= s (eg to cover them or not or to see later if solution assumptions apply w= ell). There are more from a requirement viewpoint than in the solution itse= lf as I do not address the exact content of load information and the way it= will be transferred #L1 Topology use cases (can be inserted in section 5 ) ------S1 / C1 \ ------S2 Figure 5.1 In this simple case (no DA) e.g. for a small network, the servers are peers= of the client. The client selects the server according to the load informa= tion it receives from the servers. ------S1 / C1----A \ ------S2 Figure 5.2 The agent selects the server according to the load information it receives = from the servers. Here, the client does not need to receive load informatio= n as it does not do load balancing. It is to check if load information woul= d be useful to the client for other purposes (e.g. anticipating a future ov= erload of the server). ---A1------S1 / | C1 | \ | ---A2------S2 Figure 5.3 C1 when sending a realm routed request even does not know which server will= handle the request an even more does not know to which DA S1 and S2 are co= nnected to. So the load information on the servers is not useful. But C1 ha= s to select to which from A1 or A2 it will send the request. It can do it o= n the basis of the load information of A1 or A2. But is it sufficient? If S1 has high load and S2 a small one, to improve the load balancing would= mean that a) C1 sends more traffic to A2 which forward to S2, meaning that C1 has rec= eived load information from A2 not only including A2 load but also the S2 l= oad b) or C1, having no information on server load equally sends traffic to A1 = and A2. Then if A1 receives from A2 load information including the load of = S2 may then decide to route more traffic to S2 via A2. This is less optimal= than the first case as adding a new hop in the path (C1-A1-A2-S2. An initial question is to consider if this subcases a) and b) are relevant = and enter the scope. C1, when sending a host routed request, can do it via A1 or A2 as routing f= or C1 is based on the realm. Is it to be considered if load control informa= tion received by C1 gives some hint to rather select A1 rather than A2 when= S1 is the destination host, so to avoid an additional hop? Or if it is out= of the scope? -----S3 / ---A1------S1 / | C1 | \ | ---A2------S2 \ ---- S4 Figure 5.4 This diagram is an extension of the previous one with additional servers co= nnected to A1 and A2 and could be more common than 5.3. Compared to the previous diagram, - for the subcase a), for realm routed request C1 choice between A1 and A2 = can rely on the combined (or aggregated) load of S1 and S3 compared to the = aggregated load of S2 and S4. - for the subcase b) similarly, A1 would compare an aggregated load of S2 a= nd S4 received from A2 to the aggregated load of S1 and S3. This use case may drive to consider if the load of a set of nodes (aggregat= ed load) would be useful or if it can be avoided. ---A1---S1, S3 ... / | \/ C1 | /\ \ |/ \ ---A2---S2, S4 ... Figure 5.5 In this diagram, all servers are connected to the same set of DAs, which mu= ltiply the number of connections between servers and their DAs; otherwise, = we come back to the figure 5.4 case or an hybrid case between figure 5.4 an= d 5.5. C1 when sending a request may select A1 or A2 according to a load informati= on only related to A1 load and A2 load. This selection is independent from = the server load, except if we take into account e.g. the load of the A1/S1 = connection and the load of A2/S1 connection which may be different. A1 (or A2) then selects the server according to load information received f= rom these servers, except for host routed requests. ---A1---A3----S1, S3 ... / | \/ | C1 | /\ | \ |/ \| ---A2---A4----S2, S4 ... Figure 5.6 This diagram introduces "two layers" of DAs between clients and servers. Compared to figure 5.3 or 5.4, C1 when sending a request may select A1 or A= 2 according to a load information only related to A1 load and A2 load. Then= A1(or A2)when doing further routing, are in a similar situation to C1 in F= igures 5.3 or 5.4. ---A1---A3---S1, S3 ... / | \/ | \/ C1 | /\ | /\ \ |/ \|/ \ ---A2---A4---S2, S4 ... Figure 5.7 As in figure 5.4, all servers are connected to a common set of DAs (here A3= , A4), which multiply the number of connections between servers and their D= As; otherwise, we come back to the figure 5.6 case or a hybrid case between= figures 5.6 and 5.7. C1 when sending a request may select A1 or A2 according to a load informati= on only related to A1 load and A2 load. This selection is independent from = the server load. Then A1 or A2 for futrjer routing have a similar situation to C1 in figure = 5.5. This case offer a high flexibility about load sharing that can be done in d= ifferent places, but als o may introduce higher complexity about selecting = the right routing. ___________________________ #L2 Partitioned servers (can be added in section 5) This the case of realm routed request where only one or some servers in the= same realm can handle the request, so no load balancing to other servers o= f the realm can be achieved. An intermediate proxy DA will select the possi= ble server(s)for this request, and if several servers, the DA may do some l= oad balancing between them and if one server, the DA may act as with host r= outed requests. ___________________________ #L3 Active and stand by nodes (can be inserted in section 5) In the above topology use cases, it is assumed that load sharing can be use= d between the different possible connections of the figures. If nodes are i= n an active and stand by configurations, the figures to consider are with = the only active connections. The switch from the active to the stand by nod= e with the load handling aspect is another topic. __________________________________ #L4... Some considerations from the topology use cases (can be inserted in = section 5) - there is a large variety of use cases with various places where load bala= ncing actions can be taken. This may impact the content of load information= transferred downstream. It should also be avoided to add too much complexi= ty, especially on the load information content transferred downstream, node= behavior can be more sophisticated but normally remains outside the standa= rdization scope. - clients receiving load information have not to be aware of the DAs and se= rver topologies, they nevertheless need relevant load information criteria = to select (when needed) the right next node to which to send a request. Thi= s may drive to consider if some aggregation of load information to be perfo= rmed before sending it to the clients, so to make it simpler to the clients= . _______________________________ #L6 Load information scopes (can be added in section 6) Load information can apply to various scopes that should be considered to r= etain or not : Load of a node: this is the most usual to consider. A node can be an end po= int (server) or an agent. Load of an application: The load of a server can vary according to the appl= ications (eg due to differences in the used resources). So the possibility = to have a load information per application should not be precluded at this = level of analysis. Load of a set of nodes: it may be considered interesting that the load of a= set of nodes is transferred downstream. Use cases should identify such an = interest. This drives to the aggregation of the load of the various nodes o= f the set to elaborate the load of the set. This can be done by an intermed= iate node receiving the load information of the various nodes. It can be a = weighted average between the loads; the weight is another information to be= considered (eg the capacity of the servers which may be different). Load of an agent and load of a server. Different paths via different DAs may exist between the node doing the serv= er selection and the server. The load information on the server would be th= e same; but then to which peer to send the message? This would depend of th= e load of the peer (and even of the load behind the peer). ________________________________ #L7 Addition removal of a server (can be added in section 6) When adding a server, this one will start by advertising no or a small load= , then it will be to the downstream nodes (eg DAs) handling load balancing = between servers to ensure a smooth increase of the traffic to this server, = to avoid to immediately send it too much traffic and even to not put it int= o overload. It may be questioned if a simple load information (load percent= age) is sufficient for this. When removing a server in a controlled way (e.g. for maintenance purpose, s= o outside a failure case), an objective can be to progressively reduce the = traffic to this server, with a routing of the traffic to other servers. Sim= ple load information (load percentage) would be not sufficient. It should b= e considered if this use case enter the scope of this load control mechanis= m. __________________________ #L8 Implementation and standardization (can be added in section 1) Through the use cases and the architectures considerations described in thi= s document, the focus is to define which would be the relevant load informa= tion to be transferred to the nodes that will use it. Then, given the varie= ty of use cases, the possible topologies, the place where the server select= ion is done, etc, flexibility is to be left to implementations about the no= de behavior regarding the elaboration of the load information and then its = use. Guidance or examples may also be given to help but without normative a= spects. _____________________________ #L9... Redirect agent : (can be added at the end of section 3) A Diameter node (e.g. client) can use a redirect agent to get destination h= ost addresses. The redirect agent may return several destination host addr= esses, of which the Diameter node has to select one and for this can rely o= n the load information on these hosts ___________________________ So please let me know your comments. Ben, would you be OK to complement your draft with those inputs . We can al= so have question marks or editor's notes, but I think good to have a docume= nt about which we discuss these architectural considerations. Best regards JJacques --_000_E194C2E18676714DACA9C3A2516265D2026F4908FR712WXCHMBA12z_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Dear all

 

I first wish you a  happy  new year for yo= u and your family as well in your professional life.

 

I hereafter address our new topic on Diameter load c= ontrol.

I am in favor to continue the work that Ben has cove= red in his “draft-campbell-dime-load-considerations-00” documen= t, by adding, investigating various considerations.

 

I hereafter give several additional section parts or= paragraphs  that I think could be inserted in Ben’s draft. I ha= ve put some titles and numbering (#L1, #L2 …)  to reuse in separ= ated email treads for discussion.

 

I have included topology use cases. For Diameter ove= rload,  Steve did several  presentations on the  various use= cases to consider. I think also good to do the same for Diameter load, and= to insert such use cases in the Ben’s draft. You may consider this list somewhat long but these use cases highlight a certa= in number of points for which we will have to take some decisions (eg to co= ver them or not or to see later if  solution assumptions apply well). = There are more from a requirement viewpoint than in the solution itself as I do not address the exact content of load = information and the way it will be transferred

 

 

#L1   Topology use cases (can be inserted = in section 5 )

 

 

=           ------S1<= /span>

=         /

=       C1

=         \

=           ------S2<= /span>

= Figure 5.1

=  

= In this simple case (no DA) e.g. for a small network, the servers are peers= of the client. The client selects the server according to the load informa= tion it receives from the servers.

=  

=  

=           ------S1<= /span>

=         /

= C1----A

=         \

=           ------S2<= /span>

= Figure 5.2

=  

= The agent selects the server according to the load information it receives = from the servers. Here, the client does not need to receive load informatio= n as it does not do load balancing. It is to check if load information would be useful to the client for other purposes (e.g.= anticipating a future overload of the server).

=  

=  

=    ---A1------S1

= /    |

= C1    |

= \    |

=    ---A2------S2

=  

= Figure 5.3

=  

= C1 when sending a realm routed request even does not know which server will= handle the request an even more does not know to which DA S1 and S2 are co= nnected to. So the load information on the servers is not useful. But C1 has to select to which from A1 or A2 it will send th= e request. It can do it on the basis of the load information of A1 or A2. B= ut is it sufficient?

= If S1 has high load and S2 a small one, to improve the load balancing would= mean that

= a) C1 sends more traffic to A2 which forward to S2, meaning that C1 has rec= eived load information from A2 not only including A2 load but also the S2 l= oad

= b) or C1, having no information on server load equally sends traffic to A1 = and A2. Then if A1 receives from A2 load information including the load of = S2 may then decide to route more traffic to S2 via A2. This is less optimal than the first case as adding a new hop in th= e path (C1-A1-A2-S2.

=  

= An initial question is to consider if this subcases a) and b) are relevant = and enter the scope.

=  

= C1, when sending a host routed request, can do it via A1 or A2 as routing f= or C1 is based on the realm. Is it to be considered if load control informa= tion received by C1 gives some hint to rather select A1 rather than A2 when S1 is the destination host, so to avoid an a= dditional hop? Or if it is out of the scope?     &= nbsp; 

=  

=  

=          -----S3<= /p>

=        /

=    ---A1------S1

= /    |

= C1    |

= \    |

=    ---A2------S2

=        \

=          ---- S4<= /p>

= Figure 5.4

=  

= This diagram is an extension of the previous one with additional servers co= nnected to A1 and A2 and could be more common than 5.3.

= Compared to the previous diagram,

= - for the subcase a), for realm routed request C1 choice between A1 and A2 = can rely on the combined (or aggregated) load of S1 and S3 compared to the = aggregated load of S2 and S4.

= - for the subcase b) similarly, A1 would compare an aggregated load of S2 a= nd S4 received from A2 to the aggregated load of S1 and S3.

=  

= This use case may drive to consider if the load of a set of nodes (aggregat= ed load) would be useful or if it can be avoided. 

=  

=  

=    ---A1---S1, S3 …

= /    | \/

= C1    | /\

= \    |/  \

=    ---A2---S2, S4 …

=  

= Figure 5.5

=  

= In this diagram, all servers are connected to the same set of DAs, which mu= ltiply the number of connections between servers and their DAs; otherwise, = we come back to the figure 5.4 case or an hybrid case between figure 5.4 and 5.5.

= C1 when sending a request may select A1 or A2 according to a load informati= on only related to A1 load and A2 load. This selection is independent from = the server load, except if we take into account e.g. the load of the A1/S1 connection and the load of A2/S1 connection whi= ch may be different.

=  

= A1 (or A2) then selects the server according to load information received f= rom these servers, except for host routed requests.    =         

=  

=  

=    ---A1---A3----S1, S3 …

= /    | \/ |

= C1    | /\ |

= \    |/  \|

=    ---A2---A4----S2, S4 …

=  

= Figure 5.6

=  

= This diagram introduces “two layers” of DAs between clients and= servers.

= Compared to figure 5.3 or 5.4, C1 when sending a request may select A1 or A= 2 according to a load information only related to A1 load and A2 load. Then= A1(or A2)when doing further routing, are in a similar situation to C1 in Figures 5.3 or 5.4.

=  

=    

=    ---A1---A3---S1, S3 …

= /    | \/ | \/

= C1    | /\ | /\

= \    |/  \|/  \

=    ---A2---A4---S2, S4 …

=  

= Figure 5.7

= As in figure 5.4, all servers are connected to a common set of DAs (here A3= , A4), which multiply the number of connections between servers and their D= As; otherwise, we come back to the figure 5.6 case or a hybrid case between figures 5.6 and 5.7.

= C1 when sending a request may select A1 or A2 according to a load informati= on only related to A1 load and A2 load. This selection is independent from = the server load.

= Then A1 or A2 for futrjer routing have a similar situation to C1 in figure = 5.5.

= This case offer a high flexibility about load sharing that can be done in d= ifferent places, but als o may introduce higher complexity about selecting = the right routing.   

=  

= ___________________________

=  

= #L2    Partitioned servers (can be added in section 5)

=  

= This the case of realm routed request where only one or some servers in the= same realm can handle the request, so no load balancing to other servers o= f the realm can be achieved. An intermediate proxy DA will select the possible server(s)for this request, and if several serv= ers, the DA may do some load balancing between them and if one server, the = DA may act as with host routed requests.      = ;   

=  

= ___________________________

= #L3    Active and stand by nodes (can be inserted in section= 5)

=  

= In the above topology use cases, it is assumed that load sharing can be use= d between the different possible connections of the figures. If nodes are i= n an  active and stand by configurations, the figures to consider are with the only active connections. The switch from = the active to the stand by node with the load handling aspect is another to= pic.  

=  

= __________________________________

=  

= #L4… Some considerations from the topology use cases (can be inserted= in section 5)

=  

= - there is a large variety of use cases with various places where load bala= ncing actions can be taken. This may impact the content of load information= transferred downstream. It should also be avoided to add too much complexity, especially on the load information content tra= nsferred downstream, node behavior can be more sophisticated but normally r= emains outside the standardization scope.

=  

= - clients receiving load information have not to be aware of the DAs and se= rver topologies, they nevertheless need relevant load information criteria = to select (when needed) the right next node to which to send a request. This may drive to consider if some aggregation of= load information to be performed before sending it to the clients, so to m= ake it simpler to the clients.

=  

= _______________________________

=  

= #L6   Load information scopes (can be  added in section 6)

=  

= Load information can apply to various scopes that should be considered to r= etain or not :

=  

= Load of a node: this is the most usual to consider. A node can be an end po= int (server) or an agent.

=  

= Load of an application: The load of a server can vary according to the appl= ications (eg due to differences in the used resources). So the possibility = to have a load information per application should not be precluded at this level of analysis.

=  

= Load of a set of nodes: it may be considered interesting that the load of a= set of nodes is transferred downstream. Use cases should identify such an = interest. This drives to the aggregation of the load of the various nodes of the set to elaborate the load of the set. Thi= s can be done by an intermediate node receiving the load information of the= various nodes. It can be a weighted average between the loads; the weight = is another information to be considered (eg the capacity of the servers which may be different).=

=  

= Load of an agent and load of a server.

= Different paths via different DAs may exist between the node doing the serv= er selection and the server. The load information on the server would be th= e same; but then to which peer to send the message? This would depend of the load of the peer (and even of the load behind the= peer).

=  

= ________________________________

=  

= #L7   Addition removal of a server (can be  added in section= 6)

=  

= When adding a server, this one will start by advertising no or a small load= , then it will be to the downstream nodes (eg DAs) handling load balancing = between servers to ensure a smooth increase of the traffic to this server, to avoid to immediately send it too much traff= ic and even to not put it into overload. It may be questioned if a simple l= oad information (load percentage) is sufficient for this.=

=  

= When removing a server in a controlled way (e.g. for maintenance purpose, s= o outside a failure case), an objective can be to progressively reduce the = traffic to this server, with a routing of the traffic to other servers. Simple load information (load percentage) would = be not sufficient. It should be considered if this use case enter the scope= of this load control mechanism.

=  

= __________________________

=  

= #L8   Implementation and standardization (can be added in section= 1)

=  

= Through the use cases and the architectures considerations described in thi= s document, the focus is to define which would be the relevant load informa= tion to be transferred to the nodes that will use it. Then, given the variety of use cases, the possible topologies, the= place where the server selection is done, etc, flexibility is to be left t= o implementations about the node behavior regarding the elaboration of the = load information and then its use. Guidance or examples may also be given to help but without normative aspec= ts.

 

_____________________________

 

= #L9…  Redirect agent : (can be added at the end of section 3)

=  

= A Diameter node (e.g. client) can use a redirect agent to get destination h= ost addresses.  The redirect agent may return several destination host= addresses, of which the Diameter node has to select one and for this can rely on the load information on these hosts

= ___________________________

 

 

So please let me know your comments.

 

Ben, would you be OK to complement your draft with t= hose inputs . We can also have question marks or editor’s notes, but = I think good to have a document about which we discuss these architectural = considerations.

 

Best regards

 

JJacques

 

 

--_000_E194C2E18676714DACA9C3A2516265D2026F4908FR712WXCHMBA12z_-- From nobody Mon Jan 5 07:04:38 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 131911A8A14 for ; Mon, 5 Jan 2015 07:04:36 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 1.579 X-Spam-Level: * X-Spam-Status: No, score=1.579 tagged_above=-999 required=5 tests=[BAYES_50=0.8, SPF_NEUTRAL=0.779] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Gh23wbZDXzL5 for ; Mon, 5 Jan 2015 07:04:34 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B1BB61A89F2 for ; Mon, 5 Jan 2015 07:04:34 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:65401 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1Y89Cn-0003dZ-7O for dime@ietf.org; Mon, 05 Jan 2015 07:04:32 -0800 Message-ID: <54AAA7FC.7010808@usdonovans.com> Date: Mon, 05 Jan 2015 09:04:28 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: dime@ietf.org References: <79E0AA6A-8F91-45FD-AE8A-EFF9D2A4E9D3@nostrum.com> <5491AEC7.8070307@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D90006681523C14B@DEMUMBX014.nsn-intra.net> In-Reply-To: <5BCBA1FC2B7F0B4C9D935572D90006681523C14B@DEMUMBX014.nsn-intra.net> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-OutGoing-Spam-Status: No, score=-2.9 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - biz131.inmotionhosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - usdonovans.com X-Get-Message-Sender-Via: biz131.inmotionhosting.com: authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: http://mailarchive.ietf.org/arch/msg/dime/Hiv3ooskDcY71jKh9mOmDhZQPVU Subject: Re: [Dime] DOIC WGLC: Editorial Comments X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Jan 2015 15:04:36 -0000 I'm ok with unambiguous, ensuring consistency or not incorrect. I'm inclined to go with JJ's wording. Steve On 1/2/15 5:36 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: > > -- 4.1.3, para 9: "ambiguity" > > I'm not sure that's is the word we want here. An agent could muck things up without being ambiguous. Perhaps "inconsistency"? > > SRD> The point is that the reacting nodes and reporting nodes must > unambiguously know what to do. I think ambiguous is the right word > > Ben> I can construct behavior that is not ambiguous to upstream or downstream nodes, but still breaks normative requirements. How about " ... ensure that it does not introduce incorrect behavior for either the upstream or downstream DOIC nodes." > > JJ> as Ben, ambiguity is not so right. > A proposal: "When making changes to the OC-Supported-Features or OC-OLR AVPs, the Diameter Agent needs to ensure consistency in its behavior with both upstream and downstream DOIC nodes". > > Ulrich> I agree with SRD. The ambiguity (in DOIC behavior for e.g. a reacting node) that needs to be avoided may result from an agent on path1 between client and server that makes changes to OC-Supported-Features within answers while other agents on other paths between client and server make no or different changes. The reacting node (client) would get mixed signals depending on the path taken, resulting in ambiguity. > > > > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime > From nobody Mon Jan 5 15:05:24 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9F2DF1A01D6 for ; Mon, 5 Jan 2015 15:05:22 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.91 X-Spam-Level: X-Spam-Status: No, score=-1.91 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RsGONtiQ3M6C for ; Mon, 5 Jan 2015 15:05:20 -0800 (PST) Received: from nostrum.com (raven-v6.nostrum.com [IPv6:2001:470:d:1130::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 21C731A01A5 for ; Mon, 5 Jan 2015 15:05:20 -0800 (PST) Received: from [10.0.1.23] (cpe-173-172-146-58.tx.res.rr.com [173.172.146.58]) (authenticated bits=0) by nostrum.com (8.14.9/8.14.7) with ESMTP id t05N5Fx1056759 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 5 Jan 2015 17:05:16 -0600 (CST) (envelope-from ben@nostrum.com) X-Authentication-Warning: raven.nostrum.com: Host cpe-173-172-146-58.tx.res.rr.com [173.172.146.58] claimed to be [10.0.1.23] Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) From: Ben Campbell In-Reply-To: <54A1825B.1000503@usdonovans.com> Date: Mon, 5 Jan 2015 17:05:15 -0600 X-Mao-Original-Outgoing-Id: 442191915.071785-9f8a1dbd32d3a42b49c38d2e8c7f3e54 Content-Transfer-Encoding: quoted-printable Message-Id: <1F52080A-2CEE-4D11-97BB-CCE633F32A57@nostrum.com> References: <54984D7E.3010405@usdonovans.com> <26D1E2EC-3DF6-487C-980F-F6DBE6EFDF39@nostrum.com> <54A1825B.1000503@usdonovans.com> To: Steve Donovan X-Mailer: Apple Mail (2.1993) Archived-At: http://mailarchive.ietf.org/arch/msg/dime/2pR0rxBvEj8dj5wbS-EcfgOiwho Cc: "dime@ietf.org" Subject: Re: [Dime] Handling of mandatory sub-avps X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Jan 2015 23:05:22 -0000 > On Dec 29, 2014, at 10:33 AM, Steve Donovan = wrote: >=20 > Ben, >=20 > As you suggesting that just the AVP that isn't understood is ignored = or the entire grouped AVP it is part of is ignored? If the "sub-avp" is = marked as mandatory then it would seem that the entire grouped AVP = should be ignored. I wasn't really talking about mandatory AVPs [1]. I was talking about = DOIC errors in general. Basically, if you get an OC-OLR or OC-S-F that = is bogus for some reason, you can ignore it--but the enclosing Diameter = transaction is unaffected. [1] But on re-reading the M-bit rules in 6733, I once again think we = have a disconnect for sub-avps with the m-bit set. I thought that the = rules allows us to ignore a whole grouped AVP if it had an unrecognized = sub-avp with the m-bit set. But on re-reading that part, I think that = may only be true if the grouped AVP is also not understood. >=20 > Steve >=20 > On 12/22/14 10:34 PM, Ben Campbell wrote: >> Martin, I think we are violently agreeing. A DOIC "failure" doesn't = impact the Diameter transaction. >>=20 >>=20 >>> On Dec 22, 2014, at 8:42 PM, DOLLY, MARTIN C wrote: >>>=20 >>> To be clear, ignore what one does not understand. >>>=20 >>> -----Original Message----- >>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of DOLLY, MARTIN = C >>> Sent: Monday, December 22, 2014 9:34 PM >>> To: Ben Campbell; Steve Donovan >>> Cc: dime@ietf.org >>> Subject: Re: [Dime] Handling of mandatory sub-avps >>>=20 >>> *** Security Advisory: This Message Originated Outside of AT&T ***. >>> Reference http://cso.att.com/EmailSecurity/IDSP.html for more = information. >>>=20 >>> NO, WRONG >>>=20 >>> -----Original Message----- >>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of Ben Campbell >>> Sent: Monday, December 22, 2014 7:16 PM >>> To: Steve Donovan >>> Cc: dime@ietf.org >>> Subject: Re: [Dime] Handling of mandatory sub-avps >>>=20 >>> My opinion is that any DOIC error (i.e. something wrong in OC-S-F or = OC-OLR) should never cause an error or other failure of the enclosing = transaction. Normally the only way DOIC should affect a transaction is = via abatement. >>>=20 >>> I would grudgingly accept the ability for a Diameter application = spec to say that the application must not be used without DOIC (and = potentially certain DOIC features.), as long as such a requirement was = explicit (including explicit on _how_ it should fail), but I think = that's a different use case. >>>=20 >>>> On Dec 22, 2014, at 10:57 AM, Steve Donovan = wrote: >>>>=20 >>>> All, >>>>=20 >>>> The following is an open issue from Ben's suggested editorial = changes that still needs to be addressed. >>>>=20 >>>> Regards, >>>>=20 >>>> Steve >>>>>> -- 4.3, para 4: >>>>>>=20 >>>>>> We should clarify that this is talking about mandatory to = understand for DOIC, but not for the enclosing transaction. >>>>> SRD> i'm not clear on what you are suggesting. >>>> We need to be clear that receiving a DOIC avp with a mandatory AVP = that you don't understand means you ignore the DOIC AVPs, but does not = cause the Diameter transaction to fail. Or was it your intent to allow = an application to say that if you get a DOIC avp that you can't process, = you have to fail the Diameter transaction? >>>>=20 >>>>> Do you have suggested wording? >>>> Depends on the answer to the question above. >>>>=20 >>>> _______________________________________________ >>>> DiME mailing list >>>> DiME@ietf.org >>>> https://www.ietf.org/mailman/listinfo/dime >>> _______________________________________________ >>> DiME mailing list >>> DiME@ietf.org >>> https://www.ietf.org/mailman/listinfo/dime >>>=20 >>> _______________________________________________ >>> DiME mailing list >>> DiME@ietf.org >>> https://www.ietf.org/mailman/listinfo/dime >=20 > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime From nobody Mon Jan 5 15:11:25 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B46471A0204 for ; Mon, 5 Jan 2015 15:11:22 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.91 X-Spam-Level: X-Spam-Status: No, score=-1.91 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id MwAUf1mAnOgK for ; Mon, 5 Jan 2015 15:11:20 -0800 (PST) Received: from nostrum.com (raven-v6.nostrum.com [IPv6:2001:470:d:1130::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id EF73F1A0181 for ; Mon, 5 Jan 2015 15:11:19 -0800 (PST) Received: from [10.0.1.23] (cpe-173-172-146-58.tx.res.rr.com [173.172.146.58]) (authenticated bits=0) by nostrum.com (8.14.9/8.14.7) with ESMTP id t05NBGGG010173 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 5 Jan 2015 17:11:17 -0600 (CST) (envelope-from ben@nostrum.com) X-Authentication-Warning: raven.nostrum.com: Host cpe-173-172-146-58.tx.res.rr.com [173.172.146.58] claimed to be [10.0.1.23] Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) From: Ben Campbell In-Reply-To: <1F52080A-2CEE-4D11-97BB-CCE633F32A57@nostrum.com> Date: Mon, 5 Jan 2015 17:11:16 -0600 X-Mao-Original-Outgoing-Id: 442192276.171816-29c167c37eb28b971099d1bd9133c14b Content-Transfer-Encoding: quoted-printable Message-Id: References: <54984D7E.3010405@usdonovans.com> <26D1E2EC-3DF6-487C-980F-F6DBE6EFDF39@nostrum.com> <54A1825B.1000503@usdonovans.com> <1F52080A-2CEE-4D11-97BB-CCE633F32A57@nostrum.com> To: Steve Donovan X-Mailer: Apple Mail (2.1993) Archived-At: http://mailarchive.ietf.org/arch/msg/dime/vZFSy337RxqeBJ6kfyKRpzW9i_M Cc: "dime@ietf.org" Subject: Re: [Dime] Handling of mandatory sub-avps X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Jan 2015 23:11:23 -0000 > On Jan 5, 2015, at 5:05 PM, Ben Campbell wrote: >=20 >=20 >> On Dec 29, 2014, at 10:33 AM, Steve Donovan = wrote: >>=20 >> Ben, >>=20 >> As you suggesting that just the AVP that isn't understood is ignored = or the entire grouped AVP it is part of is ignored? If the "sub-avp" is = marked as mandatory then it would seem that the entire grouped AVP = should be ignored. >=20 > I wasn't really talking about mandatory AVPs [1]. Well, I guess the email subject really _was_ about mandatory AVPs :-) > I was talking about DOIC errors in general. Basically, if you get an = OC-OLR or OC-S-F that is bogus for some reason, you can ignore it--but = the enclosing Diameter transaction is unaffected. >=20 >=20 > [1] But on re-reading the M-bit rules in 6733, I once again think we = have a disconnect for sub-avps with the m-bit set. I thought that the = rules allows us to ignore a whole grouped AVP if it had an unrecognized = sub-avp with the m-bit set. But on re-reading that part, I think that = may only be true if the grouped AVP is also not understood. >=20 >>=20 >> Steve >>=20 >> On 12/22/14 10:34 PM, Ben Campbell wrote: >>> Martin, I think we are violently agreeing. A DOIC "failure" doesn't = impact the Diameter transaction. >>>=20 >>>=20 >>>> On Dec 22, 2014, at 8:42 PM, DOLLY, MARTIN C = wrote: >>>>=20 >>>> To be clear, ignore what one does not understand. >>>>=20 >>>> -----Original Message----- >>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of DOLLY, = MARTIN C >>>> Sent: Monday, December 22, 2014 9:34 PM >>>> To: Ben Campbell; Steve Donovan >>>> Cc: dime@ietf.org >>>> Subject: Re: [Dime] Handling of mandatory sub-avps >>>>=20 >>>> *** Security Advisory: This Message Originated Outside of AT&T ***. >>>> Reference http://cso.att.com/EmailSecurity/IDSP.html for more = information. >>>>=20 >>>> NO, WRONG >>>>=20 >>>> -----Original Message----- >>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of Ben Campbell >>>> Sent: Monday, December 22, 2014 7:16 PM >>>> To: Steve Donovan >>>> Cc: dime@ietf.org >>>> Subject: Re: [Dime] Handling of mandatory sub-avps >>>>=20 >>>> My opinion is that any DOIC error (i.e. something wrong in OC-S-F = or OC-OLR) should never cause an error or other failure of the enclosing = transaction. Normally the only way DOIC should affect a transaction is = via abatement. >>>>=20 >>>> I would grudgingly accept the ability for a Diameter application = spec to say that the application must not be used without DOIC (and = potentially certain DOIC features.), as long as such a requirement was = explicit (including explicit on _how_ it should fail), but I think = that's a different use case. >>>>=20 >>>>> On Dec 22, 2014, at 10:57 AM, Steve Donovan = wrote: >>>>>=20 >>>>> All, >>>>>=20 >>>>> The following is an open issue from Ben's suggested editorial = changes that still needs to be addressed. >>>>>=20 >>>>> Regards, >>>>>=20 >>>>> Steve >>>>>>> -- 4.3, para 4: >>>>>>>=20 >>>>>>> We should clarify that this is talking about mandatory to = understand for DOIC, but not for the enclosing transaction. >>>>>> SRD> i'm not clear on what you are suggesting. >>>>> We need to be clear that receiving a DOIC avp with a mandatory AVP = that you don't understand means you ignore the DOIC AVPs, but does not = cause the Diameter transaction to fail. Or was it your intent to allow = an application to say that if you get a DOIC avp that you can't process, = you have to fail the Diameter transaction? >>>>>=20 >>>>>> Do you have suggested wording? >>>>> Depends on the answer to the question above. >>>>>=20 >>>>> _______________________________________________ >>>>> DiME mailing list >>>>> DiME@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/dime >>>> _______________________________________________ >>>> DiME mailing list >>>> DiME@ietf.org >>>> https://www.ietf.org/mailman/listinfo/dime >>>>=20 >>>> _______________________________________________ >>>> DiME mailing list >>>> DiME@ietf.org >>>> https://www.ietf.org/mailman/listinfo/dime >>=20 >> _______________________________________________ >> DiME mailing list >> DiME@ietf.org >> https://www.ietf.org/mailman/listinfo/dime >=20 From nobody Mon Jan 5 15:12:21 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9328A1A0181 for ; Mon, 5 Jan 2015 15:12:19 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.91 X-Spam-Level: X-Spam-Status: No, score=-1.91 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QeV2ytT8wxVo for ; Mon, 5 Jan 2015 15:12:16 -0800 (PST) Received: from nostrum.com (raven-v6.nostrum.com [IPv6:2001:470:d:1130::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B61D81A0204 for ; Mon, 5 Jan 2015 15:12:16 -0800 (PST) Received: from [10.0.1.23] (cpe-173-172-146-58.tx.res.rr.com [173.172.146.58]) (authenticated bits=0) by nostrum.com (8.14.9/8.14.7) with ESMTP id t05NBGGH010173 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 5 Jan 2015 17:12:16 -0600 (CST) (envelope-from ben@nostrum.com) X-Authentication-Warning: raven.nostrum.com: Host cpe-173-172-146-58.tx.res.rr.com [173.172.146.58] claimed to be [10.0.1.23] Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) From: Ben Campbell In-Reply-To: <54A1839B.1050009@usdonovans.com> Date: Mon, 5 Jan 2015 17:12:16 -0600 X-Mao-Original-Outgoing-Id: 442192336.039229-314220303d0767e19c528e845bb90c6a Content-Transfer-Encoding: quoted-printable Message-Id: <93998D34-D6B9-430C-888B-6B1E98BD7443@nostrum.com> References: <79E0AA6A-8F91-45FD-AE8A-EFF9D2A4E9D3@nostrum.com> <5491AEC7.8070307@usdonovans.com> <54984D31.5000201@usdonovans.com> <00328701-E938-444C-B8BC-ADBE05B201CB@nostrum.com> <54A1839B.1050009@usdonovans.com> To: Steve Donovan X-Mailer: Apple Mail (2.1993) Archived-At: http://mailarchive.ietf.org/arch/msg/dime/OTTVS_4mK9lfCja3hlpL0lIaAe4 Cc: dime@ietf.org Subject: Re: [Dime] DOIC WGLC: Editorial Comments X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Jan 2015 23:12:20 -0000 > On Dec 29, 2014, at 10:38 AM, Steve Donovan = wrote: >=20 >=20 > On 12/22/14 6:11 PM, Ben Campbell wrote: >> Hi, I've removed sections that seem to need no further discussion, = where you've suggested moving to separate threads, or where I'm just = gonna roll over :-) >>=20 >>> On Dec 22, 2014, at 10:56 AM, Steve Donovan = wrote: >> [...] >>>>>> -- 4.1.2, para 7: "If it selects a different algorithm, it = MUST...: >>>>>>=20 >>>>>> This is also true if it needs to announce some other feature that = needs to be indicated. >>>>> SRD> This paragraph is talking specifically about algorithms and = is needed because the AVP is optional. Are you suggesting another = sentence, another paragraph? I'm guessing that the case you talk about = is already covered elsewhere. >>>> We say this in 4.1.1 on reacting node behavior. We should make the = same statement for reporting node behavior. This is the definitive = section on reporting node behavior. If it's repeated elsewhere, we = should consider whether _that_ text is redundant. >>> SRD> Again, this paragraph is dealing specifically with rules around = which the algorithms supported by the reporting node interact with the = OC-Features-Vector AVP. The statement on other features is three = paragraphs later. >> If you mean this paragraph: >>=20 >> " The reporting node SHOULD indicate support for other DOIC features >> defined in extension drafts that it supports and that apply to the >> transaction." >>=20 >> Nothing in that (3 paragraphs later) paragraph says you MUST include = OC-Features-Vector to do that. It's left for the reader to infer. We do = explicitly say that for reacting nodes in 4.1.1. > SRD> How about adding ..."it does so using the OC-Feature-Vector AVP" = to the end of the above paragraph. That would work for me. >>=20 >> [...] >>=20 >>=20 >>=20 >=20 > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime From nobody Tue Jan 6 16:01:06 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5F72A1A876D for ; Tue, 6 Jan 2015 16:01:05 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.909 X-Spam-Level: X-Spam-Status: No, score=-1.909 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id udhdpVwy4Lvh for ; Tue, 6 Jan 2015 16:00:58 -0800 (PST) Received: from nostrum.com (raven-v6.nostrum.com [IPv6:2001:470:d:1130::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id DFF8B1A8776 for ; Tue, 6 Jan 2015 16:00:52 -0800 (PST) Received: from [10.0.1.23] (cpe-173-172-146-58.tx.res.rr.com [173.172.146.58]) (authenticated bits=0) by nostrum.com (8.14.9/8.14.7) with ESMTP id t0700nF2036931 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 6 Jan 2015 18:00:50 -0600 (CST) (envelope-from ben@nostrum.com) X-Authentication-Warning: raven.nostrum.com: Host cpe-173-172-146-58.tx.res.rr.com [173.172.146.58] claimed to be [10.0.1.23] Content-Type: multipart/alternative; boundary="Apple-Mail=_933D7EF8-8F7B-4BE3-9961-3F9B98806183" Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) From: Ben Campbell In-Reply-To: Date: Tue, 6 Jan 2015 18:00:49 -0600 X-Mao-Original-Outgoing-Id: 442281649.102287-d3373d6e37713447fc3d24ab04984955 Message-Id: References: To: "TROTTIN, JEAN-JACQUES (JEAN-JACQUES)" X-Mailer: Apple Mail (2.1993) Archived-At: http://mailarchive.ietf.org/arch/msg/dime/FXpULLy4yc_C3obPayIlZeV4BNU Cc: "dime@ietf.org" Subject: Re: [Dime] Diameter load control inputs X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Jan 2015 00:01:05 -0000 --Apple-Mail=_933D7EF8-8F7B-4BE3-9961-3F9B98806183 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Hi JJacques, To answer your lat question first, I think this is a useful analysis, = and would be willing to combine it into a new version of my previous = draft. We can talk about the details of that offline. Second, some high level observations: First, =46rom a load-balancing perspective, Figure 5.3 is functionally = equivalent to the following: =20 =E2=80=94------S1 / | C1 | \ | =E2=80=94=E2=80=94-----S2 Where S1 and S2 can proxy requests to the other according to some policy = (e.g. load balancing). I don=E2=80=99t mean to suggest you would deploy = it that way, but it makes another observation more obvious, which is = that C1->S1 or C1->S2 are more efficient than C1->S1->S2 or C1->S2->S1. My initial reaction is to think that we can generalize this to the = various use cases that have cross-connected agents. That is, when all = else is equal, shorter paths between client and server are better than longer ones. This seems to suggest = that the cross-path connections be reserved for failure or overload = cases. This probably has implications on whether the load metric sent by = an agent should somehow aggregate the load metrics of its servers. (Or = at least take them as an input.) Second, your figures 5.5-5.7 suggest that we may have cases where the = number of servers to the right of an agent may not be known by the = client. Here=E2=80=99s a simplified view: =E2=80=94=E2=80=94A1--S1...Sn / =20 C =20 \ =20 =E2=80=94=E2=80=94A2--Sn+1...Sm In this case, the load metrics for the servers are of little use to C, = since in general C will not know if it=E2=80=99s knowledge encompasses = all possible destinations. (A related question is wether the _agents_ = actually know the load metrics for all the possible destinations. I=E2=80=99= m not sure they always do, e.g. if they are using dynamic discovery. > On Jan 4, 2015, at 11:38 AM, TROTTIN, JEAN-JACQUES (JEAN-JACQUES) = wrote: >=20 > Dear all > =20 > I first wish you a happy new year for you and your family as well in = your professional life. > =20 > I hereafter address our new topic on Diameter load control. > I am in favor to continue the work that Ben has covered in his = =E2=80=9Cdraft-campbell-dime-load-considerations-00=E2=80=9D document, = by adding, investigating various considerations. > =20 > I hereafter give several additional section parts or paragraphs that = I think could be inserted in Ben=E2=80=99s draft. I have put some titles = and numbering (#L1, #L2 =E2=80=A6) to reuse in separated email treads = for discussion. > =20 > I have included topology use cases. For Diameter overload, Steve did = several presentations on the various use cases to consider. I think = also good to do the same for Diameter load, and to insert such use cases = in the Ben=E2=80=99s draft. You may consider this list somewhat long but = these use cases highlight a certain number of points for which we will = have to take some decisions (eg to cover them or not or to see later if = solution assumptions apply well). There are more from a requirement = viewpoint than in the solution itself as I do not address the exact = content of load information and the way it will be transferred > =20 > =20 > #L1 Topology use cases (can be inserted in section 5 ) > =20 > =20 > ------S1 > / > C1 > \ > ------S2 > Figure 5.1 > =20 > In this simple case (no DA) e.g. for a small network, the servers are = peers of the client. The client selects the server according to the load = information it receives from the servers. > =20 > =20 > ------S1 > / > C1----A > \ > ------S2 > Figure 5.2 > =20 > The agent selects the server according to the load information it = receives from the servers. Here, the client does not need to receive = load information as it does not do load balancing. It is to check if = load information would be useful to the client for other purposes (e.g. = anticipating a future overload of the server). > =20 > =20 > ---A1------S1 > / | > C1 | > \ | > ---A2------S2 > =20 > Figure 5.3 > =20 > C1 when sending a realm routed request even does not know which server = will handle the request an even more does not know to which DA S1 and S2 = are connected to. So the load information on the servers is not useful. = But C1 has to select to which from A1 or A2 it will send the request. It = can do it on the basis of the load information of A1 or A2. But is it = sufficient? > If S1 has high load and S2 a small one, to improve the load balancing = would mean that > a) C1 sends more traffic to A2 which forward to S2, meaning that C1 = has received load information from A2 not only including A2 load but = also the S2 load > b) or C1, having no information on server load equally sends traffic = to A1 and A2. Then if A1 receives from A2 load information including the = load of S2 may then decide to route more traffic to S2 via A2. This is = less optimal than the first case as adding a new hop in the path = (C1-A1-A2-S2. > =20 > An initial question is to consider if this subcases a) and b) are = relevant and enter the scope. > =20 > C1, when sending a host routed request, can do it via A1 or A2 as = routing for C1 is based on the realm. Is it to be considered if load = control information received by C1 gives some hint to rather select A1 = rather than A2 when S1 is the destination host, so to avoid an = additional hop? Or if it is out of the scope? =20 > =20 > =20 > -----S3 > / > ---A1------S1 > / | > C1 | > \ | > ---A2------S2 > \ > ---- S4 > Figure 5.4 > =20 > This diagram is an extension of the previous one with additional = servers connected to A1 and A2 and could be more common than 5.3. > Compared to the previous diagram, > - for the subcase a), for realm routed request C1 choice between A1 = and A2 can rely on the combined (or aggregated) load of S1 and S3 = compared to the aggregated load of S2 and S4. > - for the subcase b) similarly, A1 would compare an aggregated load of = S2 and S4 received from A2 to the aggregated load of S1 and S3. > =20 > This use case may drive to consider if the load of a set of nodes = (aggregated load) would be useful or if it can be avoided.=20 > =20 > =20 > ---A1---S1, S3 =E2=80=A6 > / | \/ > C1 | /\ > \ |/ \ > ---A2---S2, S4 =E2=80=A6 > =20 > Figure 5.5 > =20 > In this diagram, all servers are connected to the same set of DAs, = which multiply the number of connections between servers and their DAs; = otherwise, we come back to the figure 5.4 case or an hybrid case between = figure 5.4 and 5.5.=20 > C1 when sending a request may select A1 or A2 according to a load = information only related to A1 load and A2 load. This selection is = independent from the server load, except if we take into account e.g. = the load of the A1/S1 connection and the load of A2/S1 connection which = may be different. > =20 > A1 (or A2) then selects the server according to load information = received from these servers, except for host routed requests. =20= > =20 > =20 > ---A1---A3----S1, S3 =E2=80=A6 > / | \/ | > C1 | /\ | > \ |/ \| > ---A2---A4----S2, S4 =E2=80=A6 > =20 > Figure 5.6 > =20 > This diagram introduces =E2=80=9Ctwo layers=E2=80=9D of DAs between = clients and servers. > Compared to figure 5.3 or 5.4, C1 when sending a request may select A1 = or A2 according to a load information only related to A1 load and A2 = load. Then A1(or A2)when doing further routing, are in a similar = situation to C1 in Figures 5.3 or 5.4. > =20 > =20 > ---A1---A3---S1, S3 =E2=80=A6 > / | \/ | \/ > C1 | /\ | /\ > \ |/ \|/ \ > ---A2---A4---S2, S4 =E2=80=A6 > =20 > Figure 5.7 > As in figure 5.4, all servers are connected to a common set of DAs = (here A3, A4), which multiply the number of connections between servers = and their DAs; otherwise, we come back to the figure 5.6 case or a = hybrid case between figures 5.6 and 5.7.=20 > C1 when sending a request may select A1 or A2 according to a load = information only related to A1 load and A2 load. This selection is = independent from the server load. > Then A1 or A2 for futrjer routing have a similar situation to C1 in = figure 5.5. > This case offer a high flexibility about load sharing that can be done = in different places, but als o may introduce higher complexity about = selecting the right routing. =20 > =20 > ___________________________ > =20 > #L2 Partitioned servers (can be added in section 5) > =20 > This the case of realm routed request where only one or some servers = in the same realm can handle the request, so no load balancing to other = servers of the realm can be achieved. An intermediate proxy DA will = select the possible server(s)for this request, and if several servers, = the DA may do some load balancing between them and if one server, the DA = may act as with host routed requests. =20 > =20 > ___________________________ > #L3 Active and stand by nodes (can be inserted in section 5) > =20 > In the above topology use cases, it is assumed that load sharing can = be used between the different possible connections of the figures. If = nodes are in an active and stand by configurations, the figures to = consider are with the only active connections. The switch from the = active to the stand by node with the load handling aspect is another = topic. =20 > =20 > __________________________________ > =20 > #L4=E2=80=A6 Some considerations from the topology use cases (can be = inserted in section 5) > =20 > - there is a large variety of use cases with various places where load = balancing actions can be taken. This may impact the content of load = information transferred downstream. It should also be avoided to add too = much complexity, especially on the load information content transferred = downstream, node behavior can be more sophisticated but normally remains = outside the standardization scope. > =20 > - clients receiving load information have not to be aware of the DAs = and server topologies, they nevertheless need relevant load information = criteria to select (when needed) the right next node to which to send a = request. This may drive to consider if some aggregation of load = information to be performed before sending it to the clients, so to make = it simpler to the clients. > =20 > _______________________________ > =20 > #L6 Load information scopes (can be added in section 6) > =20 > Load information can apply to various scopes that should be considered = to retain or not : > =20 > Load of a node: this is the most usual to consider. A node can be an = end point (server) or an agent. > =20 > Load of an application: The load of a server can vary according to the = applications (eg due to differences in the used resources). So the = possibility to have a load information per application should not be = precluded at this level of analysis. > =20 > Load of a set of nodes: it may be considered interesting that the load = of a set of nodes is transferred downstream. Use cases should identify = such an interest. This drives to the aggregation of the load of the = various nodes of the set to elaborate the load of the set. This can be = done by an intermediate node receiving the load information of the = various nodes. It can be a weighted average between the loads; the = weight is another information to be considered (eg the capacity of the = servers which may be different). > =20 > Load of an agent and load of a server. > Different paths via different DAs may exist between the node doing the = server selection and the server. The load information on the server = would be the same; but then to which peer to send the message? This = would depend of the load of the peer (and even of the load behind the = peer). > =20 > ________________________________ > =20 > #L7 Addition removal of a server (can be added in section 6) > =20 > When adding a server, this one will start by advertising no or a small = load, then it will be to the downstream nodes (eg DAs) handling load = balancing between servers to ensure a smooth increase of the traffic to = this server, to avoid to immediately send it too much traffic and even = to not put it into overload. It may be questioned if a simple load = information (load percentage) is sufficient for this. > =20 > When removing a server in a controlled way (e.g. for maintenance = purpose, so outside a failure case), an objective can be to = progressively reduce the traffic to this server, with a routing of the = traffic to other servers. Simple load information (load percentage) = would be not sufficient. It should be considered if this use case enter = the scope of this load control mechanism. > =20 > __________________________ > =20 > #L8 Implementation and standardization (can be added in section 1) > =20 > Through the use cases and the architectures considerations described = in this document, the focus is to define which would be the relevant = load information to be transferred to the nodes that will use it. Then, = given the variety of use cases, the possible topologies, the place where = the server selection is done, etc, flexibility is to be left to = implementations about the node behavior regarding the elaboration of the = load information and then its use. Guidance or examples may also be = given to help but without normative aspects. > =20 > _____________________________ > =20 > #L9=E2=80=A6 Redirect agent : (can be added at the end of section 3) > =20 > A Diameter node (e.g. client) can use a redirect agent to get = destination host addresses. The redirect agent may return several = destination host addresses, of which the Diameter node has to select one = and for this can rely on the load information on these hosts > ___________________________ > =20 > =20 > So please let me know your comments. > =20 > Ben, would you be OK to complement your draft with those inputs . We = can also have question marks or editor=E2=80=99s notes, but I think good = to have a document about which we discuss these architectural = considerations. > =20 > Best regards > =20 > JJacques=20 > =20 > =20 > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime --Apple-Mail=_933D7EF8-8F7B-4BE3-9961-3F9B98806183 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
Hi = JJacques,

To = answer your lat question first, I think this is a useful analysis, and = would be willing to combine it into a new version of my previous draft. = We can talk about the details of that offline.

Second, some high level = observations:

First, =46rom a load-balancing perspective, Figure 5.3 is = functionally equivalent to the following:

 
  =E2=80=94------S1
/ =        |
C1       |
\        |
  =E2=80=94=E2=80=94-----S2

Where S1 and S2 can proxy requests to = the other according to some policy (e.g. load balancing). I don=E2=80=99t = mean to suggest you would deploy it that way, but it makes another = observation more obvious, which is that C1->S1 or C1->S2 are more = efficient than C1->S1->S2 or C1->S2->S1.

My initial reaction is = to think that we can generalize this to the various use cases that have = cross-connected agents. That is, when all else is equal, shorter paths = between
client and server are better than longer = ones. This seems to suggest that the cross-path connections be reserved = for failure or overload cases. This probably has implications on whether = the load metric sent by an agent should somehow aggregate the load = metrics of its servers. (Or at least take them as an input.)

Second, your figures = 5.5-5.7 suggest that we may have cases where the number of servers to = the right of an agent may not be known by the client. Here=E2=80=99s a = simplified view:

  =  =E2=80=94=E2=80=94A1--S1...Sn
 /     =    
C       
 \        
  =  =E2=80=94=E2=80=94A2--Sn+1...Sm


In this case, the = load metrics for the servers are of little use to C, since in general C = will not know if it=E2=80=99s knowledge encompasses all possible = destinations. (A related question is wether the _agents_ actually know = the load metrics for all the possible destinations. I=E2=80=99m not sure = they always do, e.g. if they are using dynamic discovery.



On Jan 4, 2015, at 11:38 = AM, TROTTIN, JEAN-JACQUES (JEAN-JACQUES) <jean-jacques.trottin@alcatel-lucent.com> wrote:

Dear all
 
I = first wish you a  happy  new year for you and your family as = well in your professional life.
 
I = hereafter address our new topic on Diameter load control.
I = am in favor to continue the work that Ben has covered in his = =E2=80=9Cdraft-campbell-dime-load-considerations-00=E2=80=9D document, = by adding, investigating various considerations.
 
I hereafter give several additional = section parts or paragraphs  that I think could be inserted in = Ben=E2=80=99s draft. I have put some titles and numbering (#L1, #L2 = =E2=80=A6)  to reuse in separated email treads for discussion.
 
I have included topology use cases. For = Diameter overload,  Steve did several  presentations on the =  various use cases to consider. I think also good to do the = same for Diameter load, and to insert such use cases in the Ben=E2=80=99s = draft. You may consider this list somewhat long but these use = cases highlight a certain number of points for which we will have = to take some decisions (eg to cover them or not or to see later if =  solution assumptions apply well). There are more from a = requirement viewpoint than in the solution itself as I do not address = the exact content of load information and the way it will be = transferred
 
 
#L1 =   Topology use cases (can be inserted in section 5 )
 
 
    =       ------S1
        = /
      C1
    =     \
          = ------S2
Figure 5.1
 
In = this simple case (no DA) e.g. for a small network, the servers are peers = of the client. The client selects the server according to the load = information it receives from the servers.
 
 
          = ------S1
        /
C1----A
        \
          ------S2
Figure 5.2
 
The agent = selects the server according to the load information it receives from = the servers. Here, the client does not need to receive load = information as it does not do load balancing. It is to check if = load information would be useful to the client for other purposes (e.g. = anticipating a future overload of the server).
 
 
  =  ---A1------S1
/    |
C1 =    |
\    |
  =  ---A2------S2
 
Figure 5.3
 
C1 when sending a realm routed request = even does not know which server will handle the request an even = more does not know to which DA S1 and S2 are connected to. So the load = information on the servers is not useful. But C1 has to select to = which from A1 or A2 it will send the request. It can do it on the = basis of the load information of A1 or A2. But is it sufficient?
If S1 has high load and S2 a small one, to improve the load = balancing would mean that
a) C1 sends more traffic to A2 = which forward to S2, meaning that C1 has received load = information from A2 not only including A2 load but also the S2 = load
b) or C1, having no information on server load = equally sends traffic to A1 and A2. Then if A1 receives from A2 = load information including the load of S2 may then decide to route more = traffic to S2 via A2. This is less optimal than the first case as = adding a new hop in the path (C1-A1-A2-S2.
 
An initial question is to consider if this subcases a) and b) = are relevant and enter the scope.
 
C1, = when sending a host routed request, can do it via A1 or A2 as routing = for C1 is based on the realm. Is it to be considered if load = control information received by C1 gives some hint to rather select = A1 rather than A2 when S1 is the destination host, so to avoid an = additional hop? Or if it is out of the scope?     =   
 
 
         -----S3
  =      /
   ---A1------S1
/    |
C1    |
\    |
   ---A2------S2
       \
    =      ---- S4
Figure 5.4
 
This diagram is an extension of the = previous one with additional servers connected to A1 and A2 = and could be more common than 5.3.
Compared to the = previous diagram,
- for the subcase a), for realm routed = request C1 choice between A1 and A2 can rely on the combined (or = aggregated) load of S1 and S3 compared to the aggregated load of S2 and = S4.
- for the subcase b) similarly, A1 would compare an = aggregated load of S2 and S4 received from A2 to the aggregated = load of S1 and S3.
 
This use case may = drive to consider if the load of a set of nodes (aggregated load) would = be useful or if it can be avoided. 
 
 
   ---A1---S1, S3 =E2=80=A6
/    | \/
C1    | /\
\    |/  \
  =  ---A2---S2, S4 =E2=80=A6
 
Figure = 5.5
 
In this diagram, all servers are = connected to the same set of DAs, which multiply the number = of connections between servers and their DAs; otherwise, we come = back to the figure 5.4 case or an hybrid case between figure 5.4 = and 5.5. 
C1 when sending a request may select A1 or = A2 according to a load information only related to A1 load and A2 = load. This selection is independent from the server load, except if we = take into account e.g. the load of the A1/S1 connection and the = load of A2/S1 connection which may be different.
 
A1 (or A2) then selects the server = according to load information received from these servers, except = for host routed requests.            
 
 
  =  ---A1---A3----S1, S3 =E2=80=A6
/    | \/ = |
C1    | /\ |
\    |/ =  \|
   ---A2---A4----S2, S4 =E2=80=A6
 
Figure 5.6
 
This diagram introduces =E2=80=9Ctwo layers=E2=80=9D of DAs = between clients and servers.
Compared to figure 5.3 or = 5.4, C1 when sending a request may select A1 or A2 according to a = load information only related to A1 load and A2 load. Then A1(or = A2)when doing further routing, are in a similar situation to C1 in = Figures 5.3 or 5.4.
 
  =   
   ---A1---A3---S1, S3 =E2=80=A6
/    | \/ | \/
C1    | /\ | = /\
\    |/  \|/  \
  =  ---A2---A4---S2, S4 =E2=80=A6
 
Figure 5.7
As in figure 5.4, all servers are = connected to a common set of DAs (here A3, A4), which multiply the = number of connections between servers and their DAs; otherwise, we come = back to the figure 5.6 case or a hybrid case between figures 5.6 = and 5.7. 
C1 when sending a request may select A1 or = A2 according to a load information only related to A1 load and A2 = load. This selection is independent from the server load.
Then A1 or A2 for futrjer routing have a similar situation to = C1 in figure 5.5.
This case offer a high flexibility about = load sharing that can be done in different places, but als o may = introduce higher complexity about selecting the right routing. =   
 
___________________________
 
#L2    Partitioned servers (can be added in section = 5)
 
This the case of realm routed = request where only one or some servers in the same realm can = handle the request, so no load balancing to other servers of the = realm can be achieved. An intermediate proxy DA will select the = possible server(s)for this request, and if several servers, the DA may = do some load balancing between them and if one server, the DA may = act as with host routed requests.         
 
___________________________
#L3    Active and stand by nodes (can be inserted = in section 5)
 
In the above topology = use cases, it is assumed that load sharing can be used between the = different possible connections of the figures. If nodes are in an =  active and stand by configurations, the figures to consider = are with the only active connections. The switch from the active to the = stand by node with the load handling aspect is another topic. =  
 
__________________________________
 
#L4=E2=80=A6 Some considerations from the topology use cases = (can be inserted in section 5)
 
- = there is a large variety of use cases with various places where load = balancing actions can be taken. This may impact the content of load = information transferred downstream. It should also be avoided to = add too much complexity, especially on the load information content = transferred downstream, node behavior can be more sophisticated but = normally remains outside the standardization scope.
 
- clients receiving load information = have not to be aware of the DAs and server topologies, = they nevertheless need relevant load information criteria to select = (when needed) the right next node to which to send a request. This = may drive to consider if some aggregation of load information to = be performed before sending it to the clients, so to make it = simpler to the clients.
 
_______________________________
 
#L6   Load information scopes (can be  added in = section 6)
 
Load information can apply = to various scopes that should be considered to retain or not :
 
Load of a node: this is the most usual = to consider. A node can be an end point (server) or an agent.
 
Load of an application: The load of a = server can vary according to the applications (eg due = to differences in the used resources). So the possibility to have a = load information per application should not be precluded at this = level of analysis.
 
Load of a set of = nodes: it may be considered interesting that the load of a set of nodes = is transferred downstream. Use cases should identify such an = interest. This drives to the aggregation of the load of the various = nodes of the set to elaborate the load of the set. This can be done = by an intermediate node receiving the load information of the = various nodes. It can be a weighted average between the loads; the = weight is another information to be considered (eg the capacity = of the servers which may be different).
 
Load of an agent and load of a server.
Different = paths via different DAs may exist between the node doing the server = selection and the server. The load information on the server would = be the same; but then to which peer to send the message? This would = depend of the load of the peer (and even of the load behind the = peer).
 
________________________________
 
#L7   Addition removal of a server (can be  added = in section 6)
 
When adding a server, = this one will start by advertising no or a small load, then it will be = to the downstream nodes (eg DAs) handling load balancing between = servers to ensure a smooth increase of the traffic to this server, = to avoid to immediately send it too much traffic and even to not put = it into overload. It may be questioned if a simple load information = (load percentage) is sufficient for this.
 
When removing a server in a controlled way (e.g. for = maintenance purpose, so outside a failure case), an objective can = be to progressively reduce the traffic to this server, with a routing = of the traffic to other servers. Simple load information (load = percentage) would be not sufficient. It should be considered if = this use case enter the scope of this load control mechanism.
 
__________________________
 
#L8   Implementation and = standardization (can be added in section 1)
 
Through the use cases and the architectures considerations = described in this document, the focus is to define which would be = the relevant load information to be transferred to the nodes that will = use it. Then, given the variety of use cases, the possible = topologies, the place where the server selection is done, etc, = flexibility is to be left to implementations about the node = behavior regarding the elaboration of the load information and then = its use. Guidance or examples may also be given to help but without = normative aspects.
 
_____________________________
 
#L9=E2=80=A6  Redirect agent : (can be added at the end = of section 3)
 
A Diameter node (e.g. = client) can use a redirect agent to get destination host addresses. =  The redirect agent may return several destination host = addresses, of which the Diameter node has to select one and for = this can rely on the load information on these hosts
___________________________
 
 
So please let me know your comments.
 
Ben, would you be OK to complement your = draft with those inputs . We can also have question marks or editor=E2=80=99= s notes, but I think good to have a document about which we discuss = these architectural considerations.
 
Best regards
 
JJacques 
 
 
_______________________________________________
DiME mailing list
DiME@ietf.org
https://www.ietf.org/mailman/listinfo/dime

= --Apple-Mail=_933D7EF8-8F7B-4BE3-9961-3F9B98806183-- From nobody Wed Jan 7 00:34:27 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A70861A00C3; Wed, 7 Jan 2015 00:34:20 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -106.912 X-Spam-Level: X-Spam-Status: No, score=-106.912 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_WHITELIST=-100] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id wl7kXBp2xR0y; Wed, 7 Jan 2015 00:34:18 -0800 (PST) Received: from rfc-editor.org (rfc-editor.org [4.31.198.49]) by ietfa.amsl.com (Postfix) with ESMTP id 6DAAE1A00F4; Wed, 7 Jan 2015 00:34:18 -0800 (PST) Received: by rfc-editor.org (Postfix, from userid 30) id CC624181CDC; Wed, 7 Jan 2015 00:33:52 -0800 (PST) To: Hans.Liu@alcatel-lucent.com, vf0213@gmail.com, jari.arkko@ericsson.com, john.loughney@nokia.com, glenzorn@gmail.com X-PHP-Originating-Script: 1005:errata_mail_lib.php From: RFC Errata System Message-Id: <20150107083352.CC624181CDC@rfc-editor.org> Date: Wed, 7 Jan 2015 00:33:52 -0800 (PST) Archived-At: http://mailarchive.ietf.org/arch/msg/dime/DNnHNeBRaU6xis1lhL2F3w6hY14 Cc: dime@ietf.org, iesg@ietf.org, rfc-editor@rfc-editor.org Subject: [Dime] [Errata Held for Document Update] RFC6733 (4210) X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Jan 2015 08:34:21 -0000 The following errata report has been held for document update for RFC6733, "Diameter Base Protocol". -------------------------------------- You may review the report below and at: http://www.rfc-editor.org/errata_search.php?rfc=6733&eid=4210 -------------------------------------- Status: Held for Document Update Type: Editorial Reported by: Hans Liu Date Reported: 2014-12-25 Held by: Benoit Claise (IESG) Section: 5.4.3 Original Text ------------- The Disconnect-Cause AVP (AVP Code 273) is of type Enumerated. A Diameter node MUST include this AVP in the Disconnect-Peer-Request message to inform the peer of the reason for its intention to shut down the transport connection. The following values are supported: REBOOTING 0 A scheduled reboot is imminent. A receiver of a DPR with above result code MAY attempt reconnection. BUSY 1 The peer’s internal resources are constrained, and it has determined that the transport connection needs to be closed. A receiver of a DPR with above result code SHOULD NOT attempt reconnection. DO_NOT_WANT_TO_TALK_TO_YOU 2 The peer has determined that it does not see a need for the transport connection to exist, since it does not expect any messages to be exchanged in the near future. A receiver of a DPR with above result code SHOULD NOT attempt reconnection. Corrected Text -------------- The Disconnect-Cause AVP (AVP Code 273) is of type Enumerated. A Diameter node MUST include this AVP in the Disconnect-Peer-Request message to inform the peer of the reason for its intention to shut down the transport connection. The following values are supported: REBOOTING 0 A scheduled reboot is imminent. A receiver of a DPR with above result code MAY attempt reconnection. BUSY 1 The internal resources are constrained, and it has determined that the transport connection needs to be closed. A receiver of a DPR with above result code SHOULD NOT attempt reconnection. DO_NOT_WANT_TO_TALK_TO_YOU 2 The node has determined that it does not see a need for the transport connection to exist, since it does not expect any messages to be exchanged in the near future. A receiver of a DPR with above result code SHOULD NOT attempt reconnection. Notes ----- A peer can either be a sender or receiver, depending on the contexst. However in same section describing usage for the same AVP (description for cause), the 1st appearance represents the role of receiver, the 2nd and 3rd appearances has changed to the role of senders, it's confusing literally. -------------------------------------- RFC6733 (draft-ietf-dime-rfc3588bis-33) -------------------------------------- Title : Diameter Base Protocol Publication Date : October 2012 Author(s) : V. Fajardo, Ed., J. Arkko, J. Loughney, G. Zorn, Ed. Category : PROPOSED STANDARD Source : Diameter Maintenance and Extensions Area : Operations and Management Stream : IETF Verifying Party : IESG From nobody Wed Jan 7 07:37:44 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E63C31A8850 for ; Wed, 7 Jan 2015 07:37:42 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.121 X-Spam-Level: X-Spam-Status: No, score=-1.121 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_NEUTRAL=0.779] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id CEMIwXA0KQIB for ; Wed, 7 Jan 2015 07:37:41 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3D0231A9145 for ; Wed, 7 Jan 2015 07:37:41 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:57003 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1Y8sfu-00011B-Vw; Wed, 07 Jan 2015 07:37:39 -0800 Message-ID: <54AD52BE.80806@usdonovans.com> Date: Wed, 07 Jan 2015 09:37:34 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: Ben Campbell References: <54984D7E.3010405@usdonovans.com> <26D1E2EC-3DF6-487C-980F-F6DBE6EFDF39@nostrum.com> <54A1825B.1000503@usdonovans.com> <1F52080A-2CEE-4D11-97BB-CCE633F32A57@nostrum.com> In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-OutGoing-Spam-Status: No, score=-0.6 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - biz131.inmotionhosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - usdonovans.com X-Get-Message-Sender-Via: biz131.inmotionhosting.com: authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: http://mailarchive.ietf.org/arch/msg/dime/GcRdDeRjGqdsNOP1gal8f908VH8 Cc: "dime@ietf.org" Subject: Re: [Dime] Handling of mandatory sub-avps X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Jan 2015 15:37:43 -0000 Ben, I agree with the behavior you are suggesting. It isn't, however, clear to me what changes need to be made to the specification. Steve On 1/5/15 5:11 PM, Ben Campbell wrote: >> On Jan 5, 2015, at 5:05 PM, Ben Campbell wrote: >> >> >>> On Dec 29, 2014, at 10:33 AM, Steve Donovan wrote: >>> >>> Ben, >>> >>> As you suggesting that just the AVP that isn't understood is ignored or the entire grouped AVP it is part of is ignored? If the "sub-avp" is marked as mandatory then it would seem that the entire grouped AVP should be ignored. >> I wasn't really talking about mandatory AVPs [1]. > Well, I guess the email subject really _was_ about mandatory AVPs :-) > >> I was talking about DOIC errors in general. Basically, if you get an OC-OLR or OC-S-F that is bogus for some reason, you can ignore it--but the enclosing Diameter transaction is unaffected. >> >> >> [1] But on re-reading the M-bit rules in 6733, I once again think we have a disconnect for sub-avps with the m-bit set. I thought that the rules allows us to ignore a whole grouped AVP if it had an unrecognized sub-avp with the m-bit set. But on re-reading that part, I think that may only be true if the grouped AVP is also not understood. >> >>> Steve >>> >>> On 12/22/14 10:34 PM, Ben Campbell wrote: >>>> Martin, I think we are violently agreeing. A DOIC "failure" doesn't impact the Diameter transaction. >>>> >>>> >>>>> On Dec 22, 2014, at 8:42 PM, DOLLY, MARTIN C wrote: >>>>> >>>>> To be clear, ignore what one does not understand. >>>>> >>>>> -----Original Message----- >>>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of DOLLY, MARTIN C >>>>> Sent: Monday, December 22, 2014 9:34 PM >>>>> To: Ben Campbell; Steve Donovan >>>>> Cc: dime@ietf.org >>>>> Subject: Re: [Dime] Handling of mandatory sub-avps >>>>> >>>>> *** Security Advisory: This Message Originated Outside of AT&T ***. >>>>> Reference http://cso.att.com/EmailSecurity/IDSP.html for more information. >>>>> >>>>> NO, WRONG >>>>> >>>>> -----Original Message----- >>>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of Ben Campbell >>>>> Sent: Monday, December 22, 2014 7:16 PM >>>>> To: Steve Donovan >>>>> Cc: dime@ietf.org >>>>> Subject: Re: [Dime] Handling of mandatory sub-avps >>>>> >>>>> My opinion is that any DOIC error (i.e. something wrong in OC-S-F or OC-OLR) should never cause an error or other failure of the enclosing transaction. Normally the only way DOIC should affect a transaction is via abatement. >>>>> >>>>> I would grudgingly accept the ability for a Diameter application spec to say that the application must not be used without DOIC (and potentially certain DOIC features.), as long as such a requirement was explicit (including explicit on _how_ it should fail), but I think that's a different use case. >>>>> >>>>>> On Dec 22, 2014, at 10:57 AM, Steve Donovan wrote: >>>>>> >>>>>> All, >>>>>> >>>>>> The following is an open issue from Ben's suggested editorial changes that still needs to be addressed. >>>>>> >>>>>> Regards, >>>>>> >>>>>> Steve >>>>>>>> -- 4.3, para 4: >>>>>>>> >>>>>>>> We should clarify that this is talking about mandatory to understand for DOIC, but not for the enclosing transaction. >>>>>>> SRD> i'm not clear on what you are suggesting. >>>>>> We need to be clear that receiving a DOIC avp with a mandatory AVP that you don't understand means you ignore the DOIC AVPs, but does not cause the Diameter transaction to fail. Or was it your intent to allow an application to say that if you get a DOIC avp that you can't process, you have to fail the Diameter transaction? >>>>>> >>>>>>> Do you have suggested wording? >>>>>> Depends on the answer to the question above. >>>>>> >>>>>> _______________________________________________ >>>>>> DiME mailing list >>>>>> DiME@ietf.org >>>>>> https://www.ietf.org/mailman/listinfo/dime >>>>> _______________________________________________ >>>>> DiME mailing list >>>>> DiME@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/dime >>>>> >>>>> _______________________________________________ >>>>> DiME mailing list >>>>> DiME@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/dime >>> _______________________________________________ >>> DiME mailing list >>> DiME@ietf.org >>> https://www.ietf.org/mailman/listinfo/dime > From nobody Wed Jan 7 07:41:45 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8C84B1A87ED for ; Wed, 7 Jan 2015 07:41:43 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.121 X-Spam-Level: X-Spam-Status: No, score=-1.121 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_NEUTRAL=0.779] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id C6tWX09wI4y3 for ; Wed, 7 Jan 2015 07:41:42 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 019171A87EC for ; Wed, 7 Jan 2015 07:41:42 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:57010 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1Y8sjq-0006Mm-Rl for dime@ietf.org; Wed, 07 Jan 2015 07:41:41 -0800 Message-ID: <54AD53B3.3060902@usdonovans.com> Date: Wed, 07 Jan 2015 09:41:39 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: dime@ietf.org References: <0AF415BD-4AA8-4A4F-942B-29DA6C9E417B@nostrum.com> <549193B8.6000603@usdonovans.com> <5491B2BB.30709@usdonovans.com> <3543DB65-DFC1-4ADE-8808-7B931F325F92@nostrum.com> <5491CE28.2020205@usdonovans.com> <0E11AEDD-6E90-4D61-8759-557B8596BAFB@nostrum.com> <54920B37.4060201@gmail.com> <2BE199F8-262D-40AB-A567-A857E94B3A6A@nostrum.com> <5BCBA1FC2B7F0B4C9D935572D900066815235C94@DEMUMBX014.nsn-intra.net> <54A1840D.5050403@usdonovans.com> In-Reply-To: <54A1840D.5050403@usdonovans.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-OutGoing-Spam-Status: No, score=-0.6 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - biz131.inmotionhosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - usdonovans.com X-Get-Message-Sender-Via: biz131.inmotionhosting.com: authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: http://mailarchive.ietf.org/arch/msg/dime/AlVF8TXGa3QwzpmCCfDnEz48OOU Subject: Re: [Dime] DOIC WGLC: duration unit X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Jan 2015 15:41:43 -0000 I am making these changes in DOIC-06. We will need another WGLC. If there are objections to this it can be addressed during that WGLC. Steve On 12/29/14 10:40 AM, Steve Donovan wrote: > It appears that we are moving toward consensus to move back to > seconds. If we do then I agree that a 24 hour maximum is reasonable. > > Does anyone object to moving back to seconds with a 24 hour maximum? > > Regards, > > Steve > > On 12/22/14 3:59 PM, TROTTIN, JEAN-JACQUES (JEAN-JACQUES) wrote: >> Dear all >> >> I am also ,in favor to take the second as unit (according to Ben 's >> arguments), and also to have a upper limit. The limit that Ben gives >> is about 50 days. Is 24 hours too short? >> >> Best regards >> >> JJacques >> >> -----Message d'origine----- >> De : DiME [mailto:dime-bounces@ietf.org] De la part de Ben Campbell >> Envoyé : vendredi 19 décembre 2014 00:47 >> À : Wiehe, Ulrich (NSN - DE/Munich) >> Cc : dime@ietf.org >> Objet : Re: [Dime] DOIC WGLC: duration unit >> >> Hi Ulrich, >> >> You bring up a good point that we need to document the limits, or at >> least describe the implications of choosing to long or short of a >> duration either way. I suspect 1s is still too short for most >> situations, and ( 2^32 - 1 / 1000 )s is probably still too long. >> >> (Don't get me wrong; I still think millisecond resolution for this is >> silly.) >> >> Thanks! >> >> Ben. >> >>> On Dec 18, 2014, at 11:11 AM, Wiehe, Ulrich (NSN - DE/Munich) >>> wrote: >>> >>> Ben, >>> >>> my inclination is to change back to seconds. However, seconds allow >>> a maximum value that is 1000 times higher and may be regarded >>> unreasonably high. In a previous version of the draft we had an >>> upper limit, and maybe when going back to seconds we should >>> re-introduce an upper limit so that the protocol does not allow >>> unreasonably long durations. >>> >>> Ulrich >>> >>> >>> -----Original Message----- >>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben Campbell >>> Sent: Thursday, December 18, 2014 12:08 AM >>> To: Jouni Korhonen >>> Cc: dime@ietf.org >>> Subject: Re: [Dime] DOIC WGLC: duration unit >>> >>> >>>> On Dec 17, 2014, at 5:01 PM, Jouni Korhonen >>>> wrote: >>>> >>>> [snip] >>>> >>>>>> I'll step out of the argument and let someone else be champion >>>>>> for millisecond granularity. >>>>> Any other takers? Are there real use cases for sub-second precision? >>>> I do not really care. We changed that from seconds to milliseconds >>>> for some reason.. but no not see a reason to change it back either. >>> I'd argue that we should make it the "right thing", regardless of >>> whether we changed it before. (Although remembering why might go far >>> to answering my last question below.) >>> >>> I've describe why I think it is false precision, and can become >>> harmful. To rephrase it, choosing too small of durations will cause >>> harm by forcing rapid OLR updates (as in many per second.) These >>> updates cause work for both reporting nodes and reacting nodes. >>> >>> We could offer guidance of how to avoid that harm. Or we could >>> choose a resolution that makes it harder to cause such harm in the >>> first place. I think good protocol design favors the later. >>> >>> Do you disagree with the potential for harm? Or do you see some use >>> case for sub-second precision that I've missed? >>> >>> >>> _______________________________________________ >>> DiME mailing list >>> DiME@ietf.org >>> https://www.ietf.org/mailman/listinfo/dime >> _______________________________________________ >> DiME mailing list >> DiME@ietf.org >> https://www.ietf.org/mailman/listinfo/dime >> >> _______________________________________________ >> DiME mailing list >> DiME@ietf.org >> https://www.ietf.org/mailman/listinfo/dime >> > > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime > From nobody Wed Jan 7 07:56:26 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5C1CC1A8873 for ; Wed, 7 Jan 2015 07:56:22 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.121 X-Spam-Level: X-Spam-Status: No, score=-1.121 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_NEUTRAL=0.779] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id WLvoAvu7VIwO for ; Wed, 7 Jan 2015 07:56:16 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 37D0E1A7000 for ; Wed, 7 Jan 2015 07:56:16 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:57027 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1Y8sxw-0001Vv-MO; Wed, 07 Jan 2015 07:56:14 -0800 Message-ID: <54AD571C.7060608@usdonovans.com> Date: Wed, 07 Jan 2015 09:56:12 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: Ben Campbell , "Wiehe, Ulrich (NSN - DE/Munich)" References: <54912CBA.8080701@gmail.com> <549192FD.7060403@usdonovans.com> <5491BCB3.30608@usdonovans.com> <0EEB7B88-CEEF-4A33-BD61-E4378F0D054D@nostrum.com> <5491CCC9.3090809@usdonovans.com> <4586B22E-3CDD-462E-8246-D55F25F4365C@nostrum.com> <5491F723.6080203@usdonovans.com> <54920272.80508@usdonovans.com> <52901958-73B6-49FE-8DA4-A8D2F8276DD0@nostrum.com> <5BCBA1FC2B7F0B4C9D935572D900066815235CCD@DEMUMBX014.nsn-intra.net> <8FB9C2A7-7D61-4D46-9808-AD17DB61B8CE@nostrum.com> In-Reply-To: <8FB9C2A7-7D61-4D46-9808-AD17DB61B8CE@nostrum.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-OutGoing-Spam-Status: No, score=-0.6 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - biz131.inmotionhosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - usdonovans.com X-Get-Message-Sender-Via: biz131.inmotionhosting.com: authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: http://mailarchive.ietf.org/arch/msg/dime/CD_WJKZt90o-tGayEoLvfRezTCg Cc: "dime@ietf.org" Subject: Re: [Dime] DOIC WGLC: Changing Algorithms X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Jan 2015 15:56:22 -0000 All, After further discussion with Ben, the recommendation is to NOT include the wording proposed in the attached email. Instead I propose to add the following wording in section 4.1.3 (section 5.1.3 in version -06) after the third paragraph: Note: When multiple agents are serving as the reacting node for a non supporting Diameter endpoint, each of those agents will be advertising capabilities for what looks to the reporting node like a single entity. Care should be taken to ensure that reporting node behavior is not adversely impacted in this scenario. For instance, if frequent changes in advertised features is a concern then care needs to be taken to ensure that all agents advertising capabilities for a single entity advertise the same DOIC features. Regards, Steve On 12/19/14 1:58 PM, Ben Campbell wrote: > Steve and I had an offline discussion, and I think we agree that the reporting node can be forced to change algorithms during an active overload condition, if it gets a request that doesn't advertise support for the active algorithm. > > We currently have text forbidding the reporting node from changing algorithms during an active overload condition, without making this exception. We assume that we still want to otherwise keep the limitation on algorithm changes during overload. Here's a concrete proposal: > > In 4.1.2: > > Old: > > For an ongoing overload condition, a reporting node MUST NOT change the selected algorithm during the period of time that it is in an overload condition and, as a result, is sending OC-OLR AVPs in answer messages. > > New: > > For an ongoing overload condition, a reporting node MUST NOT initiate a change to the selected algorithm during the period of time that it is in an overload condition and, as a result, is sending OC-OLR AVPs in answer messages. This rule does not affect the case where the OC-Supported-Features in a new request matching the OLR does not advertise support for the current algorithm, in which case the reporting node would be forced to change algorithms. However, this rule does constrain the reporting node from changing algorithms simply because the reacting node advertises other algorithms in addition to one currently in use. > > Added text in 4.1.1: > > If a reacting node is using an abatement algorithm to abate traffic due to an active OLR from a reporting node, the reacting node SHOULD continue to advertise support for that algorithm in future requests that match the OLR, until the overload condition is terminated. > > >> On Dec 18, 2014, at 11:46 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: >> >> Ben, Steve, >> >> Section 4.2.1.2 says: >> A reporting node SHOULD maintain OCS entries per supported Diameter >> application, per supported (and eventually selected) Abatement >> Algorithm and per report-type. >> >> For example, an HSS would maintain two OCSs for S6a host-type reports, one for loss and one for rate. When receiving a request that advertises only loss, the returned OLR would be the one according to the loss-OCS; When receiving a request that advertises loss and rate, the HSS has two returned OLR would be the one according to the rate-OCS. >> >> I don't see a problem when algorithm is changed at the reacting node. >> >> Ulrich >> >> >> >> -----Original Message----- >> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben Campbell >> Sent: Wednesday, December 17, 2014 11:39 PM >> To: Steve Donovan >> Cc: dime@ietf.org >> Subject: Re: [Dime] DOIC WGLC: Changing Algorithms >> >> >>> On Dec 17, 2014, at 4:23 PM, Steve Donovan wrote: >>> >>> >>> On 12/17/14 3:54 PM, Ben Campbell wrote: >>>>> On Dec 17, 2014, at 3:35 PM, Steve Donovan wrote: >>>>> >>>>> >>>>> On 12/17/14 1:00 PM, Ben Campbell wrote: >>>>>>> On Dec 17, 2014, at 12:34 PM, Steve Donovan wrote: >>>>>>> >>>>>>>> Okay, new picture: >>>>>>>> >>>>>>>> >>>>>>>>> On Dec 17, 2014, at 11:26 AM, Steve Donovan >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>> Ben, >>>>>>>>> >>>>>>>>> The value of the Origin-Host matters greatly here. In both cases, what S needs to know is if there is a reacting node for traffic coming from C1 and if there is a reacting node for traffic coming from C2. >>>>>>>>> >>>>>>>> There is no assumption in the draft right now that we have a correlation between reacting nodes and clients. That might be required for client-targed OLRs, but we don't have those yet. >>>>>>>> >>>>>>>> Consider a different picture. In this case, C never supports DOIC. the reacting node role happens either at A1/A2 or at A3, depending on which flow you look at. >>>>>>>> >>>>>>>> A1--- >>>>>>>> / \ >>>>>>>> C -- -------A3------S >>>>>>>> \ / >>>>>>>> A2--- >>>>>>>> >>>>>>>> Now, assume the same flows, but substitute A1 for C1, A2, for C2, and A3 for A. All requests now have the same origin-host. >>>>>>>> >>>>>>>> Before you say this is unrealistic: The issue is the same for any situation where one client can send traffic across multiple agents to the same destination. It doesn't matter if there is one or a million. >>>>>>>> >>>>>>> SRD> Yes, this is nasty. With attribution S can detect the scenario. I'm not sure what it does once it selects it. This can be addressed to some degree by adding a deployment recommendation that all agents taking on reacting node functionality for a single endpoint select the same algorithm. >>>>>> I think some sort of attribution is the long-term solution. Another option might be some sort of DCA state identifier, or a combination of the two. (e.g. multiple "virtual" reacting node at the same physical node.) The details will be non-trivial to figure out. >>>>>> >>>>>> But to close the loop, I think the _short_ term solution is to say that, while a reporting node should not _initiate_ a change in algorithms during an overload condition, it must still handle the situation where the reacting node forces a change. We could go further to say that reacting node also should not initiate such a change, but we would have to recognize that there are scenarios where that guidance cannot be enforced, and the reporting node still has to handle them. >>>>>> >>>>>> We might need to think about what it means from an OCS perspective for a reporting node to send OLRs with different algorithms (or potentially other capability parameters) for the "same" overload event. >>>>> SRD> I think it is a better solution to stay with what we have now. The reporting node MUST NOT change the algorithm during an active overload condition. If a reacting node advertises support for it, the reacting node is saying it will support that algorithm for the duration of any overload condition that happens prior to the reacting node changing the advertised algorithm. The change in advertised algorithm will take effect after the overload condition goes away. >>>>> >>>> I disagree. I don't think we want to allow the reporting node to ever indicate an algorithm that was not advertised in the request. That violates normative language earlier in the section that says the selected algorithm MUST be one of the ones advertised in the request. It can also cause problems for reacting nodes, where they get OLRs for an algorithm they don't understand. >>> SRD> They clearly do understand the algorithm. They advertised it before the overload report started. We can change the normative language to cover this exception. >> In my first scenario, this is not true. C2 (or A2) _never_ understood the rate algorithm, and never advertised support for it. >> >> The whole point of this exercise was to show that the reporting node cannot, in the general case, distinguish between multiple reacting nodes with different capabilities, and a single reacting node that changes capabilities. >> >> By "general case", I mean no assumption that the reacting nodes are peers with the reporting nodes, and no assumption that you can correlate origin-host values (in requests) to reacting-nodes. >> >> >>> I think the principle of minimizing work on an overloaded reporting node is the more important principle here. If the reacting node changes the advertised set of algorithms during an active overload condition then the overloaded reporting node will be required to send end-of-overload OLRs for the previous algorithm and then send start-of-overload OLRs for the new algorithm. This seems complex at a time the overloaded node should be focusing on getting out of the overload condition. >> Sending an OLR that the reacting node does not understand will not help you get out of overload. >> >> I don't see how this is any more complex that if you simply have multiple reacting nodes with different capabilities--and I don't see how to avoid supporting that case. >> >>>> I think that's considerably more important that restricting the reporting node from changing algorithms (Which, btw, does no harm with the only algorithms that we are seriously contemplating.We speculate that it might cause harm for some future algorithm.) >>> SRD> We already have the restriction on the reporting node. >> We already have both restrictions, and they contradict. I believe the _existing_ restriction to not select an algorithm that is not advertised in the request is more important than the _existing_ restriction to not change algorithms during an overload condition. >> >> >>>> Remember, this is not just about a single reacting node changing it's capabilities, it's also about multiple reacting nodes with different capabilities. We can't disallow one without disallowing the other. >>> SRD> Multiple reacting nodes with different capabilities is all the more reason to hold things constant during an overload condition. >> I don't follow that. You seem to be pushing towards using the same algorithm for all reacting nodes once an overload condition starts. Is that your intent? (Given the possibility that some future reacting node will only support "loss", that "same algorithm" would pretty much always need to be loss.) >> >>> I'm not proposing disallowing reacting nodes from changing the set of capabilities, I'm proposing that these changes don't take effect while there is an active overload condition. >> The problem exists even if no reacting node ever changes its capabilities. >> >>>> >>>>> SRD> I don't think we need to update the OCS in this document to handle multiple algorithms. This can be done in the extension drafts. We might want to make it clear, as it appears it isn't already, that a reacting node might need to support multiple algorithms at the same time. >>>> Do you mean reacting or reporting node in the last sentence? Assuming you mean it as written, the problem is not that a reacting node may need to support multiple algorithms at the same time. It's that it may get OLRs that it cannot act upon because it doesn't support the algorithm. >>> SRD> I meant reporting nodes. >>>> If, otoh, you meant reporting node, I don't understand how a reporting node can have multiple algorithms for the same overload event, without reflecting that possibility in the OCS. >>> SRD> Yes, it will need to be reflected in the OCS. We don't have multiple algorithms now so it isn't needed now. I'm saying we might want to say it might me needed in the future. >> I'd rather not make each new algorithm redefine the basic structure of OCS. >> >> But, if you recall, my point was to say we need to _think_ about how this impacts OCS, not that we necessarily need to change anything. Are you opposed to thinking about it? (And no, I don't think this short exchange quite counts as that.) >> >>>> >>>> >> _______________________________________________ >> DiME mailing list >> DiME@ietf.org >> https://www.ietf.org/mailman/listinfo/dime >> >> _______________________________________________ >> DiME mailing list >> DiME@ietf.org >> https://www.ietf.org/mailman/listinfo/dime > From nobody Wed Jan 7 08:13:12 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 291F91A6F2F for ; Wed, 7 Jan 2015 08:13:11 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.91 X-Spam-Level: X-Spam-Status: No, score=-1.91 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HZx0NoN22o_7 for ; Wed, 7 Jan 2015 08:13:07 -0800 (PST) Received: from nostrum.com (raven-v6.nostrum.com [IPv6:2001:470:d:1130::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B50851A00A8 for ; Wed, 7 Jan 2015 08:13:07 -0800 (PST) Received: from [10.0.1.23] (cpe-173-172-146-58.tx.res.rr.com [173.172.146.58]) (authenticated bits=0) by nostrum.com (8.14.9/8.14.7) with ESMTP id t07GD5T3024569 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 7 Jan 2015 10:13:06 -0600 (CST) (envelope-from ben@nostrum.com) X-Authentication-Warning: raven.nostrum.com: Host cpe-173-172-146-58.tx.res.rr.com [173.172.146.58] claimed to be [10.0.1.23] Content-Type: text/plain; charset=windows-1252 Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) From: Ben Campbell In-Reply-To: <54AD571C.7060608@usdonovans.com> Date: Wed, 7 Jan 2015 10:13:05 -0600 X-Mao-Original-Outgoing-Id: 442339985.522578-62907a495954a26a1abb2f4a923ef08f Content-Transfer-Encoding: quoted-printable Message-Id: <77254C21-850E-4169-8FFA-65F2A276D826@nostrum.com> References: <54912CBA.8080701@gmail.com> <549192FD.7060403@usdonovans.com> <5491BCB3.30608@usdonovans.com> <0EEB7B88-CEEF-4A33-BD61-E4378F0D054D@nostrum.com> <5491CCC9.3090809@usdonovans.com> <4586B22E-3CDD-462E-8246-D55F25F4365C@nostrum.com> <5491F723.6080203@usdonovans.com> <54920272.80508@usdonovans.com> <52901958-73B6-49FE-8DA4-A8D2F8276DD0@nostrum.com> <5BCBA1FC2B7F0B4C9D935572D900066815235CCD@DEMUMBX014.nsn-intra.net> <8FB9C2A7-7D61-4D46-9808-AD17DB61B8CE@nostrum.com> <54AD571C.7060608@usdonovans.com> To: Steve Donovan X-Mailer: Apple Mail (2.1993) Archived-At: http://mailarchive.ietf.org/arch/msg/dime/glvx6th2DpCKGBThbnou15pu7po Cc: "dime@ietf.org" Subject: Re: [Dime] DOIC WGLC: Changing Algorithms X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Jan 2015 16:13:11 -0000 I am almost okay with that. But on reflection, I think the issue is = broader than described in the first sentence. For example (SE =3D=3D supporting endpoint, NSE =3D=3D non-supporting = endpoint, etc.) SE ---- \ ----NSA ---- RepNode SE ---- / ... and ... NSE ---- \ ----SA ---- RepNode NSE ---- / These scenarios look exactly the same from the reporting node's = perspective. That is, the Reporting Node cannot tell if it has multiple = supporting endpoints with different features, or one supporting agent = that is arbitrarily changing its advertised features. You can also run = into the issue if all nodes support DOIC, if agents modify OC-S-F. So now (and admitting to opinion flapping), I wonder if the guidance = should be that the Reporting Node cannot depend on consistent OC = capabilities between requests, and must be prepared in general to deal = with frequent changes in advertised features. > On Jan 7, 2015, at 9:56 AM, Steve Donovan = wrote: >=20 > All, >=20 > After further discussion with Ben, the recommendation is to NOT = include the wording proposed in the attached email. Instead I propose = to add the following wording in section 4.1.3 (section 5.1.3 in version = -06) after the third paragraph: >=20 > Note: When multiple agents are serving as the reacting node = for a non supporting > Diameter endpoint, each of those agents will be advertising = capabilities for > what looks to the reporting node like a single entity. Care = should be taken > to ensure that reporting node behavior is not adversely = impacted in this scenario. > For instance, if frequent changes in advertised features is a = concern then > care needs to be taken to ensure that all agents advertising = capabilities for > a single entity advertise the same DOIC features. >=20 > Regards, >=20 > Steve >=20 > On 12/19/14 1:58 PM, Ben Campbell wrote: >> Steve and I had an offline discussion, and I think we agree that the = reporting node can be forced to change algorithms during an active = overload condition, if it gets a request that doesn't advertise support = for the active algorithm. >>=20 >> We currently have text forbidding the reporting node from changing = algorithms during an active overload condition, without making this = exception. We assume that we still want to otherwise keep the limitation = on algorithm changes during overload. Here's a concrete proposal: >>=20 >> In 4.1.2: >>=20 >> Old: >>=20 >> For an ongoing overload condition, a reporting node MUST NOT change = the selected algorithm during the period of time that it is in an = overload condition and, as a result, is sending OC-OLR AVPs in answer = messages. >>=20 >> New: >>=20 >> For an ongoing overload condition, a reporting node MUST NOT initiate = a change to the selected algorithm during the period of time that it is = in an overload condition and, as a result, is sending OC-OLR AVPs in = answer messages. This rule does not affect the case where the = OC-Supported-Features in a new request matching the OLR does not = advertise support for the current algorithm, in which case the reporting = node would be forced to change algorithms. However, this rule does = constrain the reporting node from changing algorithms simply because the = reacting node advertises other algorithms in addition to one currently = in use. >>=20 >> Added text in 4.1.1: >>=20 >> If a reacting node is using an abatement algorithm to abate traffic = due to an active OLR from a reporting node, the reacting node SHOULD = continue to advertise support for that algorithm in future requests that = match the OLR, until the overload condition is terminated. >>=20 >>=20 >>> On Dec 18, 2014, at 11:46 AM, Wiehe, Ulrich (NSN - DE/Munich) = wrote: >>>=20 >>> Ben, Steve, >>>=20 >>> Section 4.2.1.2 says: >>> A reporting node SHOULD maintain OCS entries per supported = Diameter >>> application, per supported (and eventually selected) Abatement >>> Algorithm and per report-type. >>>=20 >>> For example, an HSS would maintain two OCSs for S6a host-type = reports, one for loss and one for rate. When receiving a request that = advertises only loss, the returned OLR would be the one according to the = loss-OCS; When receiving a request that advertises loss and rate, the = HSS has two returned OLR would be the one according to the rate-OCS. >>>=20 >>> I don't see a problem when algorithm is changed at the reacting = node. >>>=20 >>> Ulrich >>>=20 >>>=20 >>>=20 >>> -----Original Message----- >>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben = Campbell >>> Sent: Wednesday, December 17, 2014 11:39 PM >>> To: Steve Donovan >>> Cc: dime@ietf.org >>> Subject: Re: [Dime] DOIC WGLC: Changing Algorithms >>>=20 >>>=20 >>>> On Dec 17, 2014, at 4:23 PM, Steve Donovan = wrote: >>>>=20 >>>>=20 >>>> On 12/17/14 3:54 PM, Ben Campbell wrote: >>>>>> On Dec 17, 2014, at 3:35 PM, Steve Donovan = wrote: >>>>>>=20 >>>>>>=20 >>>>>> On 12/17/14 1:00 PM, Ben Campbell wrote: >>>>>>>> On Dec 17, 2014, at 12:34 PM, Steve Donovan = wrote: >>>>>>>>=20 >>>>>>>>> Okay, new picture: >>>>>>>>>=20 >>>>>>>>>=20 >>>>>>>>>> On Dec 17, 2014, at 11:26 AM, Steve Donovan = >>>>>>>>>> wrote: >>>>>>>>>>=20 >>>>>>>>>> Ben, >>>>>>>>>>=20 >>>>>>>>>> The value of the Origin-Host matters greatly here. In both = cases, what S needs to know is if there is a reacting node for traffic = coming from C1 and if there is a reacting node for traffic coming from = C2. >>>>>>>>>>=20 >>>>>>>>> There is no assumption in the draft right now that we have a = correlation between reacting nodes and clients. That might be required = for client-targed OLRs, but we don't have those yet. >>>>>>>>>=20 >>>>>>>>> Consider a different picture. In this case, C never supports = DOIC. the reacting node role happens either at A1/A2 or at A3, depending = on which flow you look at. >>>>>>>>>=20 >>>>>>>>> A1--- >>>>>>>>> / \ >>>>>>>>> C -- -------A3------S >>>>>>>>> \ / >>>>>>>>> A2--- >>>>>>>>>=20 >>>>>>>>> Now, assume the same flows, but substitute A1 for C1, A2, for = C2, and A3 for A. All requests now have the same origin-host. >>>>>>>>>=20 >>>>>>>>> Before you say this is unrealistic: The issue is the same for = any situation where one client can send traffic across multiple agents = to the same destination. It doesn't matter if there is one or a million. >>>>>>>>>=20 >>>>>>>> SRD> Yes, this is nasty. With attribution S can detect the = scenario. I'm not sure what it does once it selects it. This can be = addressed to some degree by adding a deployment recommendation that all = agents taking on reacting node functionality for a single endpoint = select the same algorithm. >>>>>>> I think some sort of attribution is the long-term solution. = Another option might be some sort of DCA state identifier, or a = combination of the two. (e.g. multiple "virtual" reacting node at the = same physical node.) The details will be non-trivial to figure out. >>>>>>>=20 >>>>>>> But to close the loop, I think the _short_ term solution is to = say that, while a reporting node should not _initiate_ a change in = algorithms during an overload condition, it must still handle the = situation where the reacting node forces a change. We could go further = to say that reacting node also should not initiate such a change, but we = would have to recognize that there are scenarios where that guidance = cannot be enforced, and the reporting node still has to handle them. >>>>>>>=20 >>>>>>> We might need to think about what it means from an OCS = perspective for a reporting node to send OLRs with different algorithms = (or potentially other capability parameters) for the "same" overload = event. >>>>>> SRD> I think it is a better solution to stay with what we have = now. The reporting node MUST NOT change the algorithm during an active = overload condition. If a reacting node advertises support for it, the = reacting node is saying it will support that algorithm for the duration = of any overload condition that happens prior to the reacting node = changing the advertised algorithm. The change in advertised algorithm = will take effect after the overload condition goes away. >>>>>>=20 >>>>> I disagree. I don't think we want to allow the reporting node to = ever indicate an algorithm that was not advertised in the request. That = violates normative language earlier in the section that says the = selected algorithm MUST be one of the ones advertised in the request. It = can also cause problems for reacting nodes, where they get OLRs for an = algorithm they don't understand. >>>> SRD> They clearly do understand the algorithm. They advertised it = before the overload report started. We can change the normative = language to cover this exception. >>> In my first scenario, this is not true. C2 (or A2) _never_ = understood the rate algorithm, and never advertised support for it. >>>=20 >>> The whole point of this exercise was to show that the reporting node = cannot, in the general case, distinguish between multiple reacting nodes = with different capabilities, and a single reacting node that changes = capabilities. >>>=20 >>> By "general case", I mean no assumption that the reacting nodes are = peers with the reporting nodes, and no assumption that you can correlate = origin-host values (in requests) to reacting-nodes. >>>=20 >>>=20 >>>> I think the principle of minimizing work on an overloaded reporting = node is the more important principle here. If the reacting node changes = the advertised set of algorithms during an active overload condition = then the overloaded reporting node will be required to send = end-of-overload OLRs for the previous algorithm and then send = start-of-overload OLRs for the new algorithm. This seems complex at a = time the overloaded node should be focusing on getting out of the = overload condition. >>> Sending an OLR that the reacting node does not understand will not = help you get out of overload. >>>=20 >>> I don't see how this is any more complex that if you simply have = multiple reacting nodes with different capabilities--and I don't see how = to avoid supporting that case. >>>=20 >>>>> I think that's considerably more important that restricting the = reporting node from changing algorithms (Which, btw, does no harm with = the only algorithms that we are seriously contemplating.We speculate = that it might cause harm for some future algorithm.) >>>> SRD> We already have the restriction on the reporting node. >>> We already have both restrictions, and they contradict. I believe = the _existing_ restriction to not select an algorithm that is not = advertised in the request is more important than the _existing_ = restriction to not change algorithms during an overload condition. >>>=20 >>>=20 >>>>> Remember, this is not just about a single reacting node changing = it's capabilities, it's also about multiple reacting nodes with = different capabilities. We can't disallow one without disallowing the = other. >>>> SRD> Multiple reacting nodes with different capabilities is all the = more reason to hold things constant during an overload condition. >>> I don't follow that. You seem to be pushing towards using the same = algorithm for all reacting nodes once an overload condition starts. Is = that your intent? (Given the possibility that some future reacting node = will only support "loss", that "same algorithm" would pretty much always = need to be loss.) >>>=20 >>>> I'm not proposing disallowing reacting nodes from changing the set = of capabilities, I'm proposing that these changes don't take effect = while there is an active overload condition. >>> The problem exists even if no reacting node ever changes its = capabilities. >>>=20 >>>>>=20 >>>>>> SRD> I don't think we need to update the OCS in this document to = handle multiple algorithms. This can be done in the extension drafts. = We might want to make it clear, as it appears it isn't already, that a = reacting node might need to support multiple algorithms at the same = time. >>>>> Do you mean reacting or reporting node in the last sentence? = Assuming you mean it as written, the problem is not that a reacting node = may need to support multiple algorithms at the same time. It's that it = may get OLRs that it cannot act upon because it doesn't support the = algorithm. >>>> SRD> I meant reporting nodes. >>>>> If, otoh, you meant reporting node, I don't understand how a = reporting node can have multiple algorithms for the same overload event, = without reflecting that possibility in the OCS. >>>> SRD> Yes, it will need to be reflected in the OCS. We don't have = multiple algorithms now so it isn't needed now. I'm saying we might = want to say it might me needed in the future. >>> I'd rather not make each new algorithm redefine the basic structure = of OCS. >>>=20 >>> But, if you recall, my point was to say we need to _think_ about how = this impacts OCS, not that we necessarily need to change anything. Are = you opposed to thinking about it? (And no, I don't think this short = exchange quite counts as that.) >>>=20 >>>>>=20 >>>>>=20 >>> _______________________________________________ >>> DiME mailing list >>> DiME@ietf.org >>> https://www.ietf.org/mailman/listinfo/dime >>>=20 >>> _______________________________________________ >>> DiME mailing list >>> DiME@ietf.org >>> https://www.ietf.org/mailman/listinfo/dime >>=20 >=20 From nobody Wed Jan 7 08:34:43 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 693851A1BDA for ; Wed, 7 Jan 2015 08:34:38 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.12 X-Spam-Level: X-Spam-Status: No, score=-1.12 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, SPF_NEUTRAL=0.779] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ngOietaSWHGp for ; Wed, 7 Jan 2015 08:34:29 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 98C4A1A8835 for ; Wed, 7 Jan 2015 08:33:52 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:57088 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1Y8tYK-0003kW-OM for dime@ietf.org; Wed, 07 Jan 2015 08:33:51 -0800 Message-ID: <54AD5FEC.8060507@usdonovans.com> Date: Wed, 07 Jan 2015 10:33:48 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: dime@ietf.org References: <79E0AA6A-8F91-45FD-AE8A-EFF9D2A4E9D3@nostrum.com> <5491AEC7.8070307@usdonovans.com> In-Reply-To: Content-Type: multipart/alternative; boundary="------------030308060304070008050806" X-OutGoing-Spam-Status: No, score=-0.6 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - biz131.inmotionhosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - usdonovans.com X-Get-Message-Sender-Via: biz131.inmotionhosting.com: authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: http://mailarchive.ietf.org/arch/msg/dime/fDKqGdpavPJc2uXybzy8JZn7jL8 Subject: Re: [Dime] DOIC WGLC: Editorial Comments X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Jan 2015 16:34:38 -0000 This is a multi-part message in MIME format. --------------030308060304070008050806 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit On 12/22/14 2:24 PM, TROTTIN, JEAN-JACQUES (JEAN-JACQUES) wrote: > Dear all > > Hereafter some comments (with JJ>)on some of the points discussed between Ben and Steve. They are not essential > > > -- section 3.1, 3rd paragraph: "Reporting nodes also include overload reports..." > > "Reporting nodes _may_ also include overload reports..." > JJ> The "may" is ambiguous as there is a SHOULD in 4.2.3 when an active OCS. For my clarification, has a "may" in lower case a different meaning from a MAY in upper case. To be only descriptive as with 1st sentence of the paragraph : eg " Reporting nodes communicate overload occurrences by sending the OLR AVP in answers (coming from 3.4, para 4". > > [...] SRD> "may" in lower case is not a normative requirement. > > -- section 3.3, general: > > Much of this section is redundant to stuff in the parent section. (**JJ section 3)I suggest reducing the parent section detail, and keeping it here. (This may be true for subsequent children of section 3.) (**JJ effectively, but may need significant modifications ) > SRD> Do you have specific suggestions? > Ben> Remove the 2nd to last and 3rd to last paragraph in 3.0. > JJ> OK but in 3.3 to use the text of the removed paragraphs from 3.0 for host report as well as for realm report SRD> Ok. > > [...] > > > -- 4.1.3, para 9: "ambiguity" > > I'm not sure that's is the word we want here. An agent could muck things up without being ambiguous. Perhaps "inconsistency"? > SRD> The point is that the reacting nodes and reporting nodes must > unambiguously know what to do. I think ambiguous is the right word > > Ben> I can construct behavior that is not ambiguous to upstream or downstream nodes, but still breaks normative requirements. How about " ... ensure that it does not introduce incorrect behavior for either the upstream or downstream DOIC nodes." > > JJ> as Ben, ambiguity is not so right. > A proposal: "When making changes to the OC-Supported-Features or OC-OLR AVPs, the Diameter Agent needs to ensure consistency in its behavior with both upstream and downstream DOIC nodes". SRD> Addressed in a separate message. > > > -- 4.2.1.1, para 1: > > Do I understand correctly that the reacting node only keeps OCS for those combinations that it has actually received an OLR for? If so, that's not clear from the wording. > SRD> Do you have suggested wording? > Ben> It depends. Does a reacting node keep OCS when it hasn't received an OLR? > > If no: > > "A reacting node SHOULD maintain the following OCS for each active OLR it receives per Diameter application..." > > if yes: > > Then I think the section needs some more thought to distinguish between what is stored for OLRs, vs when no OLR is received. > > Also, I think the preface to the second bullet list seems wrong. I don't see how you could make an implementation work right without at least keeping sequence number and expiration time, at least when you have an active OLR. > > JJ> my point would be to describe in 4.2.1.3 when an OCS is created / deleted (as in 4.2.1.4 for Reporting node which addresses the creation of an OCS, deletion should also be added)) > About the MAY in the preface to the second bullet list, to a have a SHOULD in line with 1st paragraph statement "the A reacting node SHOULD maintain the following OCS..." As it is implementation, there were remarks that various ways can address the OCS or equivalent handling SRD> The following is already in 4.2.1.3 (now 5.2.1.3 in -06): If the received OLR is for a new overload condition then a reacting node MUST generate a new OCS entry for the overload condition. > > [...] > > -- 4.2.1.3, para 2: > > Should this combination include origin-host or origin-realm? App-Id? > SRD> I don't understand this. > JJ> not sure we need additional text as it is elsewhere described the matching of an OLR to an OCS > > [...] > > -- 4.2.2, 2nd to last para: > > I think we need something a bit stronger here. The endpoint needs to take some action that makes sense for the application. The details of that are beyond our scope, but the general need is not. > SRD> We cannot enforce application behavior in a Diameter specification. I don't see the need for anything more . Do you have suggested wording? > > Ben> Diameter endpoints that throttle requests [ MUST /need to ] do so according to the rules of the client application. Those rules will vary by application, and are beyond the scope of this document. > SRD> Ok, without the MUST > > JJ> We have in the same section:.: "The abatement treatment applied depends on the context of the request". We can write "...depends on the application and on the context of the request". Is it not enough? SRD> We have the following in the current -06 version. I think this works well enough. Diameter endpoints that throttle requests need to do so according to the rules of the client application. Those rules will vary by application, and are beyond the scope of this document. > > [...] > > -- 4.2.3, para 2: > > Doesn't this also need to match the scope for the request type? E.g. Destination realm or destination host? For example, a host report for host A would not match OCS for host B, even though both had the same report type and application id. > SRD> I guess this matters when an agent is the reporting node > > Ben> I think it matters the same if the reporting node is an endpoint. For example, would you consider a host-routed-request with D-H: "foo" to match an host report for host "bar"? (I'm on the fence here whether that is correct behavior, but I think the behavior should be the same for endpoints and agents.) > > Actually, on reflection, how does this affect the scenario of an agent that passes through a host report and generates a realm report? Or a server that generates both? > > SRD> Yes, I believe it does. I suggest we delete paragraph 2, as the > criteria for matching an OCS will be report type dependent. > > JJ> here 4.2.3 is for the reporting node behavior. It was discussed a while ago if the OCS in the reporting node was per client (so taking into account the Origin Host of the request or an OCS common to all clients, so independent of the Origin Host of the request and with the same OLR sent to all clients. The second option (common OCS) was retained for this draft. The OCS per client would be an option for a further extension. Si I am OK with the current wording. > > -- 4.2.3, last para: > > An example of what we have in mind could be helpful here. > SRD> I'm open to suggested wording... > > Ben> Add "For example, it might wait some period of time after overload ends before terminating the OLR, or it might send a series of OLRs indicating progressively less overload severity." > SRD> Ok > > JJ> Avoiding oscillation is an important requirement of RFC7068 and this sentence is one in the draft dealing with oscillations.? A basic oscillation case is the following one, can we a text (in fact a guidance ) on this/ point. There are also somùe relma ted qtement in > "e.g a reporting node having requested a strong traffic reduction, then normally a bit later may observe that it is no more overloaded due to the reduced traffic received, but it should not immediately send an OLR with a small traffic reduction or even terminates the overload condition as this will most probably again result in a strong increase of the incoming traffic as no more reduced, so creating an oscillation." > This point is somewhat also addressed in the two last paragraphs of 5, in the context of the loss algorithm. This oscillation aspect is more general and so be addressed in this 4.2.3 section > > [...] > > -- 4.3, para 4: > We should clarify that this is talking about mandatory to understand for DOIC, but not for the enclosing transaction. > > SRD> i'm not clear on what you are suggesting. > > Ben> We need to be clear that receiving a DOIC avp with a mandatory AVP that you don't understand means you ignore the DOIC AVPs, but does not cause the Diameter transaction to fail. Or was it your intent to allow an application to say that if you get a DOIC avp that you can't process, you have to fail the Diameter transaction? > > SRD> This requires discussion on the list. I'll start a thread. > > JJ> In OC-Supported-Features AVP sent by reacting node, no bit in the OC-Feature-Vector is mandatory except the bit for loss algorithm support. Then if there are additional AVPs in the OC-Supported-Features AVP, they can be ignored except if they are related to a particular feature bit in the OC-Feature-Vector which make this additional AVP mandatory to be supported if the feature is supported by the reporting node. In any case, the request should not fail. > If the OLR AVP contains new AVPs, this will be also related to the corresponding feature bit that, if supported, may require the new AVP be mandatory in the OLRS sent back by the reporting node.. This will be part of the new feature description introducing additional AVPs. So I do not think we need to say more in this draft. This will be in the extension. SRD> This has been discussed in a separate thread. > > [...] > > -- 5.1, para 4: > > Convoluted paragraph. How about "How about "reporting nodes request the stateless reduction of the number of requests by an indicated percentage." > SRD> Ok. > JJ> OK on Ben wording but "stateless" can be removed as mentioned earlier in the section and not directly linked to this sentence. > > Then about "...to what the reacting node otherwise would have sent" , this point, I think, is described in 5.3 paragraph 4 > > > Best regards > > JJacques > > > -----Message d'origine----- > De : DiME [mailto:dime-bounces@ietf.org] De la part de Steve Donovan > Envoyé : mercredi 17 décembre 2014 17:27 > À : dime@ietf.org > Objet : Re: [Dime] DOIC WGLC: Editorial Comments > > > On 12/16/14, 9:02 PM, Ben Campbell wrote: >> Here's some nits, editorial, and structural comments that are generally non-substantive. With the possible exception of comments about 2119 language, most of these could be ignored without consequence, but I think we'd have a better document if we at least thought about them: >> >> -- General: >> >> We keep referring to the DOIC "solution". I think "mechanism" is more appropriate. I would think of a DOIC "solution" as a deployment that leverages the DOIC "mechanism". > SRD> I don't see an issue here, as long as we are consistent. >> We overuse the word Diameter in front of other things. E.g. Diameter nodes, Diameter Agents, Diameter clients, Diameter servers, etc. This entire draft is about Diameter; we don't have to keep saying it. It tends to get awkward when we use it a lot in close proximity. > SRD> This was done based on feedback from Benoit. We are being > explicit. If there are paragraphs where it is particularly cumbersome, please point out those paragraphs and we can try to make them less cumbersome. >> Should we put consistently quotes around "loss" when we describe the "loss" algorithm? >> >> -- Requirements (2119 language section) >> >> This is oddly placed. I'm used to seeing that after the introduction, either stand-alone or as part of a larger terminology section. The RFC editor recommends putting it as section 2. > SRD> Ok. >> -- section 2, Abatement Algorithm: "A mechanism..." >> >> I suggest "An extensible mechanism..." > SRD> Ok. >> -- Section 2, Diversion: >> >> Still needs work. the "by selecting" phrase needs to indicate what does the selecting. "Path" should probably be "path or destination". >> >> Proposed text: >> >> "An overload abatement mechanism, where the reacting node selects alternate destinations or paths for for requests." > SRD> I'm ok with this wording. >> -- section 2, OCS: "Reporting and reacting node internally maintained state..." >> >> I suggest "Internal state maintained by a reporting or reacting node..." > SRD> Ok. >> -- section 2, Realm-Routed Requests: "... does not know the host that will service..." >> >> I suggest: "... does not know which host will service ..." > SRD> Ok. >> We should also add a comment that it may be possible to apply diversion to realm routed requests. > SRD> Where? >> -- section 2, Throttling: " ... a Diameter Client not sending requests..." >> >> I suggest " ... a Client choosing to not send requests ..." > SRD> A Diameter Client... >> -- section 3, 2nd paragraph: >> >> Client, servers, and agents should not be capitalized. Should "Reporting node" and "Reacting node" be hyphenated? Consider moving the last sentence to the start of the next paragraph. > SRD> The capitalization of Diameter Clients, Diameter Servers and > Diameter agents was Benoit's suggestion to make it explicit what is being referred to. I don't see the need for hyphenation in this context. I'm ok with moving the sentence. >> -- section 3.1, paragraph 1: " This is made possible by adding overload control AVPs, the OC-OLR AVP and the OC- Supported-Features AVP, as optional AVPs into existing commands..." >> >> I suggest "This is made possible by adding the optional overload control AVPs OC-OLR and OC-Supported-Features into existing commands." > SRD> OK. >> -- section 3.1, 3rd paragraph: "Reporting nodes also include overload reports..." >> >> "Reporting nodes _may_ also include overload reports..." > SRD> OK. >> -- section 3.1, 4th paragraph: "Clients MAY report..." >> >> Should not be normative in this section. > SRD> Agreed. >> -- section 3.2, 6th paragraph: "The OC-Feature-Vector AVP will contain..." >> >> "... will _always_ contain..." > SRD> Ok. >> -- section 3.2, 7th paragraph: " ... all answer messages to requests ..." >> >> suggest "... all answers to requests..." > SRD> Ok. >> -- section 3.2, paragraph 9: "Reporting nodes are allowed to..." >> >> "Reporting nodes can..." > SRD> Ok. >> Also consider clarifying that they can change algorithms _between_transactions_, as long as there's no active overload condition. >> >> -- section 3.2, paragraph 10 (starting with "The individual features..." >> >> Consider moving this entire paragraph to earlier in the section. >> >> -- section 3.2, paragraph 11: "The DCA mechanism must also allow..." > SRD> This paragraph looks redundant. I suggest removing it. >> --> "The DCA mechanism allows..." >> >> "... the agent updates the OC-Supported-Features..." --> " ... the agent can update the OC-Supported-Features..." > SRD> Ok. >> -- section 3.3, general: >> >> Much of this section is redundant to stuff in the parent section. I >> suggest reducing the parent section detail, and keeping it here. (This >> may be true for subsequent children of section 3.) > SRD> Do you have specific suggestions? >> -- 3.3, third paragraph: >> >> s/ , / : / > SRD> I don't agree. The commas are there because it is a list. >> -- 3.3, paragraph 4: >> >> In this overview, I suggest text saying that HOST_REPORT indicates a >> host report, and just using the term "host report" the rest of the >> time. (Same for realm report) > SRD> Why? >> -- 3.3, para 7: "A host-report, for instance, will generally by generated by tracking utilization of resources..." >> >> I suggest "A host-report might be generated by tracking use of resources..." > SRD> OK. >> -- 3.3, para 9: " ... are responsible for applying the overload abatement algorithm..." >> >> I suggest " ... apply the abatement algorithm..." > SRD> Ok. >> -- 3.4, para 2: " ... the definition of new report types and the definition of new scopes ..." >> >> Aren't these sort of the same thing? That is, you add new scopes by extending report type? > SRD> Can't you have a how report that applies only to sessions on that host? >> -- 3.4, para 3: >> >> First two sentences are a bit confusing. A new reader will likely think they contradict, without some explanation that OC-Feature-Vector is a child of OC-S-F. > SRD> They seam clear to me. Do you have a suggested clarification? >> -- 3.4, para 4: >> >> First sentence has already been stated more than once. No need to repeat here. > SRD> The first sentence is there to provide context for the second > sentence. >> -- 4.1.1, Para 1: "It MAY include the OC-Feature-Vector AVP." >> >> consider adding ", as a sub-avp of OC-Supported-Features." > SRD> OK >> - 4.1.1, last paragraph: "This behavior is described in ..." >> >> What is the antecedent to "this"? If it's "loss algorithm" behavior, then the reference to section 4.2 should not be needed. > SRD> Agreed. >> -- 4.1.2, para 2: >> >> It's probably worth reiterating that the reacting node may not be the server, and this requirement may mean inserting AVPS into answers that came from upstream. > SRD> I don't see the need. Do you have suggested wording? >> -- 4.1.2, para 3: "...response messages ... " >> >> "... _answer_ messages ..." > SRD> OK. >> -- 4.1.2, para 7: "If it selects a different algorithm, it MUST...: >> >> This is also true if it needs to announce some other feature that needs to be indicated. > SRD> This paragraph is talking specifically about algorithms and is > needed because the AVP is optional. Are you suggesting another sentence, another paragraph? I'm guessing that the case you talk about is already covered elsewhere. >> -- 4.1.3, para 3: "... Agent MUST include OC-Supported-Features in request messages it receives..." >> >> I suspect this should say "... requests that it _forwards_" or "_relays_". > SRD> To differentiate between the requests that it rejects. Ok, I think > relays is the better word. >> -- 4.1.3, para 5 and 6: >> >> Is the reporting node section limited to endpoints? If not, the these paragraphs effectively restate normative language about reporting node behavior from that section. Once we've said what a reporting node normatively has to do, we should just be able to say that an agent acting as a reporting node has all the responsibilities of a reporting node, and not restate the normative requirements. > SRD> I'm ok with this but it feels like more than an editorial change to me. >> -- 4.1.3, para 7: >> >> The first MAY is a consequence (the complement) of the 2nd MAY. It should at least not be 2119 language, and probably can be omitted entirely. > SRD> Do you have suggested wording? >> -- 4.1.3, para 9, last sentence: >> >> Does this mean an agent can only change OC-S-F in an answer if it changed it in the request? I don't think we want that restriction, but the context and "as such," seem to scope the MAY to that situation. > SRD> I don't read it that way. The first sentence is describing one > reason why an agent might change OC-S-F. It doesn't say it is the only reason. >> -- 4.1.3, para 9: "ambiguity" >> >> I'm not sure that's is the word we want here. An agent could muck things up without being ambiguous. Perhaps "inconsistency"? > SRD> The point is that the reacting nodes and reporting nodes must > unambiguously know what to do. I think ambiguous is the right word. >> -- 4.2.1.1, para 1: >> >> Do I understand correctly that the reacting node only keeps OCS for those combinations that it has actually received an OLR for? If so, that's not clear from the wording. > SRD> Do you have suggested wording? >> -- 4.2.1.2, para 1: >> >> Likewise, the reporting node only keeps OCS for actual overload conditions where it sends OLRs? > SRD> Do you have suggested wording? >> -- 4.2.1.3, para 2: >> >> Should this combination include origin-host or origin-realm? App-Id? > SRD> I don't understand this. >> -- 4.2.1.3, para 3: ... a reporting node MUST process..." >> >> Should that be "reacting node"? > SRD> Yes. >> -- 4.2.1.3, para 4: >> >> Paragraph does not make sense. (I think we've already discussed this one from Ulrich's comments). > SRD> Yes, this is addressed already. >> -- 4.2.1.3, 3rd para from end: "... update the OCS entry as being expired." >> >> I suggest language like " invalid" or "terminated". I take "expired" >> to mean "naturally expired", which is different from the case >> described here. There may be subtle behavior difference. (For example, >> a reacting node might choose to log "expirations" differently than >> "explicit terminations".) > SRD> For the context of this specification I think expired works. > Implementations can differentiate types of expired if they have a reason. Nothing here prevents that. >> -- 4.2.1.4, para 9: "... including the reduction percentage..." >> >> I suggest "... including, for example, the reduction percentage..." > SRD> OK. >> -- 4.2.1.4, para 11: " ... MUST update the sequence number ..." >> >> I suggest s / update / increment > SRD> OK. >> -- 4.2.2, 2nd to last para: >> >> I think we need something a bit stronger here. The endpoint needs to take some action that makes sense for the application. The details of that are beyond our scope, but the general need is not. > SRD> We cannot enforce application behavior in a Diameter > specification. I don't see the need for anything more . Do you have > suggested wording? >> -- 4.2.3, para 2: >> >> Doesn't this also need to match the scope for the request type? E.g. Destination realm or destination host? For example, a host report for host A would not match OCS for host B, even though both had the same report type and application id. > SRD> I guess this matters when an agent is the reporting node. >> -- 4.2.3, paras 8 and 9: >> >> We put the currently less favored approach first, with the favored approach in the following paragraph. I suggest we put the more favored approach first. > SRD> OK. >> >> -- 4.2.3, last para: >> >> An example of what we have in mind could be helpful here. > SRD> I'm open to suggested wording... >> >> -- 4.3, para 4: >> >> We should clarify that this is talking about mandatory to understand for DOIC, but not for the enclosing transaction. > SRD> i'm not clear on what you are suggesting. Do you have suggested > wording? >> -- 4.3, para 5: >> >> Why is it different depending on whether the feature is an algorithm or not? Also, isn't this mostly redundant to the paragraph about new normative behavior? > SRD> I agree, this paragraph can be removed. >> -- 4.3, para 6, last sentence >> >> This is redundant to earlier normative language in the section >> (assuming a new report type will always involve new normative >> behavior.) > SRD> I agree, the last sentence can be removed. >> -- 4.3, para 7, last sentence >> >> Also redundant > SRD> Agreed. >> -- 4.3, last para, last sentence: >> >> It's not clear if this means section 8 of this doc, or 6733. I suggest putting this sentence before the subsequent one. > SRD> OK. >> -- 5.1, para 4: >> >> Convoluted paragraph. How about "How about "reporting nodes request the stateless reduction of the number of requests by an indicated percentage." > SRD> Ok. >> We should also clarify that this reduction is in comparison to what the reacting node otherwise would have sent, rather than what it may have previously sent. > SRD> Isn't this already covered? Do you have suggested wording? >> -- 5.3, para 5: >> >> Needs a sentence or paragraph to describe the 100% issue before describing how to back down from it. > SRD> It's discussed earlier in the document. I'm ok with adding it > again. Do you have suggested wording? >> "... following concerns are RECOMMENDED ..." >> >> following procedures...? > SRD> OK. >> -- 5.3, para 6: "... does not receive an OLR in messages sent to the formerly overloaded node..." >> >> Do we mean "... does not receive an OLR in answers received from the formerly overloaded node..."? > SRD> Agreed. >> -- para 6, last paragraph >> >> Paragraph is off topic for section. It probably belongs in the extensibility section, or at least somewhere other than here. > SRD> Do you mean section 6? This isn't about extensibility but about how > Diameter applications integrate DOIC. It probably belongs in the intro or overview sections. >> -- 6.1, last para: >> >> I think we moved this to 6.2, but forgot to delete it here. > SRD> Yup, already addressed as part of Ulrich's comments. >> -- 6.2: >> >> Why did the AVP code jump to TBD6? (Also seems out of order in the >> table.) > SRD> Historical reasons. Doesn't matter, the real values will be filled > in eventually. >> Is it to late to rename the value to OLR_LOSS_ALGO? > SRD> Yes. :-) >> -- 9.4, para 2: "A node MUST not..." >> >> "A node MUST _NOT_ ..." > SRD> Ok. >> -- References: >> >> 5905 and 5729 are not cited in the document. > SRD> Ok. >> draft-ietf-dime-e2e-sec-req-00: Outdated version. > SRD> Ok. >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> _______________________________________________ >> DiME mailing list >> DiME@ietf.org >> https://www.ietf.org/mailman/listinfo/dime >> > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime > > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime > --------------030308060304070008050806 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit
On 12/22/14 2:24 PM, TROTTIN, JEAN-JACQUES (JEAN-JACQUES) wrote:
Dear all

Hereafter some comments (with JJ>)on some of the points discussed between Ben and Steve. They are not essential
 

-- section 3.1, 3rd paragraph: "Reporting nodes also include overload reports..."

"Reporting nodes _may_ also include overload reports..." 
JJ> The "may" is ambiguous as there is a SHOULD in 4.2.3 when an active OCS. For my clarification, has a "may" in lower case a different meaning from a MAY in upper case. To be only descriptive as with 1st sentence of the paragraph : eg " Reporting nodes communicate overload occurrences by sending the OLR AVP in answers (coming from 3.4, para 4". 

 [...]
SRD> "may" in lower case is not a normative requirement.

-- section 3.3, general:

Much of this section is redundant to stuff in the parent section. (**JJ section 3)I suggest reducing the parent section detail, and keeping it here. (This may be true for subsequent children of section 3.) (**JJ effectively, but may need significant modifications ) 
SRD> Do you have specific suggestions?
Ben> Remove the 2nd to last and 3rd to last paragraph in 3.0.
JJ> OK but in 3.3 to use the text of the removed paragraphs from 3.0 for host report as well as for realm report
SRD> Ok.

 [...]
 

-- 4.1.3, para 9: "ambiguity"

I'm not sure that's is the word we want here. An agent could muck things up without being ambiguous. Perhaps "inconsistency"? 
SRD> The point is that the reacting nodes and reporting nodes must
unambiguously know what to do.  I think ambiguous is the right word

Ben> I can construct behavior that is not ambiguous to upstream or downstream nodes, but still breaks normative requirements. How about " ... ensure that it does not introduce incorrect behavior for either the upstream or downstream DOIC nodes."

JJ> as Ben, ambiguity is not so right. 
A proposal: "When making changes to the OC-Supported-Features or OC-OLR AVPs, the Diameter Agent needs to ensure  consistency in its behavior with both upstream and downstream DOIC nodes".
SRD> Addressed in a separate message.
	

-- 4.2.1.1, para 1:

Do I understand correctly that the reacting node only keeps OCS for those combinations that it has actually received an OLR for? If so, that's not clear from the wording. 
SRD> Do you have suggested wording?
Ben> It depends. Does a reacting node keep OCS when it hasn't received an OLR?

If no:

"A reacting node SHOULD maintain the following OCS for each active OLR it receives per Diameter application..."

if yes:

Then I think the section needs some more thought to distinguish between what is stored for OLRs, vs when no OLR is received.

Also, I think the preface to the second bullet list seems wrong. I don't see how you could make an implementation work right without at least keeping sequence number and expiration time, at least when you have an active OLR.

JJ>  my point would be to describe in 4.2.1.3 when an OCS is created / deleted (as in 4.2.1.4 for Reporting node which addresses the creation of an OCS, deletion should also be added))
About the MAY in the preface to the second bullet list, to a have a SHOULD in line with 1st paragraph statement "the A reacting node SHOULD maintain the following OCS..." As it is implementation, there were remarks that various ways can  address the OCS or equivalent  handling
SRD> The following is already in 4.2.1.3 (now 5.2.1.3 in -06):

   If the received OLR is for a new overload condition then a reacting
   node MUST generate a new OCS entry for the overload condition.


[...]

-- 4.2.1.3, para 2:

Should this combination include origin-host or origin-realm? App-Id? 
SRD> I don't understand this.
JJ> not sure we need additional text as it is elsewhere described the matching of an OLR to an OCS

[...]

 -- 4.2.2, 2nd to last para:
 
I think we need something a bit stronger here. The endpoint needs to take some action that makes sense for the application. The details of that are beyond our scope, but the general need is not.
SRD> We cannot enforce application behavior in a Diameter specification.   I don't see the need for anything more .  Do you have suggested wording?

Ben> Diameter endpoints that throttle requests [ MUST /need to ] do so according to the rules of the client application. Those rules will vary by application, and are beyond the scope of this document.
SRD> Ok, without the MUST

JJ> We have in the same section:.: "The abatement treatment applied depends on the context of the request". We can write "...depends on the application and on the context of the request". Is it not enough?
SRD> We have the following in the current -06 version.  I think this works well enough.

   Diameter endpoints that throttle requests need to do so according to
   the rules of the client application.  Those rules will vary by
   application, and are beyond the scope of this document.


[...]

-- 4.2.3, para 2:

Doesn't this also need to match the scope for the request type? E.g. Destination realm or destination host? For example, a host report for host A would not match OCS for host B, even though both had the same report type and application id. 
SRD> I guess this matters when an agent is the reporting node

Ben> I think it matters the same if the reporting node is an endpoint. For example, would you consider a host-routed-request with D-H: "foo" to match an host report for host "bar"?  (I'm on the fence here whether that is correct behavior, but I think the behavior should be the same for endpoints and agents.)

Actually, on reflection, how does this affect the scenario of an agent that passes through a host report and generates a realm report? Or a server that generates both?

SRD> Yes, I believe it does.  I suggest we delete paragraph 2, as the
criteria for matching an OCS will be report type dependent.

JJ>  here 4.2.3 is for the reporting node behavior. It was discussed a while ago if the OCS in the reporting node  was per client (so taking into account the Origin Host of the request or an  OCS common to all clients, so independent of the Origin Host of the request and with the same OLR sent to all clients. The second option (common OCS)  was retained for this draft. The OCS per client would be an option for a further extension.  Si I am OK with the current wording.

-- 4.2.3, last para:

An example of what we have in mind could be helpful here.
SRD> I'm open to suggested wording...

Ben> Add "For example, it might wait some period of time after overload ends before terminating the OLR, or it might send a series of OLRs indicating progressively less overload severity."
SRD> Ok

JJ>  Avoiding  oscillation is an important requirement of RFC7068  and this sentence is one in the draft dealing with oscillations.?  A basic oscillation case is the following one, can we a text (in fact a guidance ) on this/ point. There are also somùe relma	ted qtement in 
"e.g a reporting node having requested a strong traffic reduction, then normally a bit later may observe that it is no more overloaded due to the reduced  traffic received, but it should not immediately send an OLR with a small traffic reduction or even terminates the overload condition as this will most probably again result in a strong increase of the incoming traffic as no more reduced, so creating an oscillation."
This point is somewhat also addressed in the two last paragraphs of 5, in the context of the loss algorithm. This oscillation aspect is more general and so be addressed in this 4.2.3 section

[...]

-- 4.3, para 4: 
We should clarify that this is talking about mandatory to understand for DOIC, but not for the enclosing transaction.

SRD> i'm not clear on what you are suggesting.

Ben> We need to be clear that receiving a DOIC avp with a mandatory AVP that you don't understand means you ignore the DOIC AVPs, but does not cause the Diameter transaction to fail. Or was it your intent to allow an application to say that if you get a DOIC avp that you can't process, you have to fail the Diameter transaction?

SRD> This requires discussion on the list.  I'll start a thread.

JJ> In OC-Supported-Features AVP sent by reacting node, no bit in the OC-Feature-Vector is mandatory except the bit for loss algorithm support. Then if there are additional AVPs in the OC-Supported-Features AVP, they can be ignored except if they are related to a particular feature bit in the OC-Feature-Vector which make this additional AVP mandatory to be supported if the feature is supported by the reporting node.  In any case, the request should not fail.
If the OLR AVP contains new AVPs, this will be also related to the corresponding feature bit that, if supported,  may require the new AVP be  mandatory in the OLRS sent back by the reporting node.. This will be part of the new feature description introducing additional AVPs. So I do not think we need to say more in this draft. This will be in the extension.
SRD> This has been discussed in a separate thread.

[...]

-- 5.1, para 4:

Convoluted paragraph. How about "How about "reporting nodes request the stateless reduction of the number of requests by an indicated percentage." 
SRD> Ok. 
JJ> OK on Ben wording but "stateless" can be removed as  mentioned earlier in the section and not directly linked to this sentence. 

Then about "...to what the reacting node otherwise would have sent" , this point, I think, is described in 5.3 paragraph 4


Best regards

JJacques 


-----Message d'origine-----
De : DiME [mailto:dime-bounces@ietf.org] De la part de Steve Donovan
Envoyé : mercredi 17 décembre 2014 17:27
À : dime@ietf.org
Objet : Re: [Dime] DOIC WGLC: Editorial Comments


On 12/16/14, 9:02 PM, Ben Campbell wrote:

Here's some nits, editorial, and structural comments that are generally non-substantive. With the possible exception of comments about 2119 language, most of these could be ignored without consequence, but I think we'd have a better document if we at least thought about them:

-- General:

We keep referring to the DOIC "solution". I think "mechanism" is more appropriate. I would think of a DOIC "solution" as a deployment that leverages the DOIC "mechanism".

SRD> I don't see an issue here, as long as we are consistent.

We overuse the word Diameter in front of other things. E.g. Diameter nodes, Diameter Agents, Diameter clients, Diameter servers, etc. This entire draft is about Diameter; we don't have to keep saying it. It tends to get awkward when we use it a lot in close proximity.

SRD> This was done based on feedback from Benoit.  We are being
explicit.  If there are paragraphs where it is particularly cumbersome, please point out those paragraphs and we can try to make them less cumbersome.

Should we put consistently quotes around "loss" when we describe the "loss" algorithm?

-- Requirements (2119 language section)

This is oddly placed. I'm used to seeing that after the introduction, either stand-alone or as part of a larger terminology section. The RFC editor recommends putting it as section 2.

SRD> Ok.

-- section 2, Abatement Algorithm: "A mechanism..."

I suggest "An extensible mechanism..."

SRD> Ok.

-- Section 2, Diversion:

Still needs work.  the "by selecting" phrase needs to indicate what does the selecting. "Path" should probably be "path or destination".

Proposed text:

"An overload abatement mechanism, where the reacting node selects alternate destinations or paths for for requests."

SRD> I'm ok with this wording.

-- section 2, OCS: "Reporting and reacting node internally maintained state..."

I suggest "Internal state maintained by a reporting or reacting node..."

SRD> Ok.

-- section 2, Realm-Routed Requests: "... does not know the host that will service..."

I suggest: "... does not know which host will service ..."

SRD> Ok.

We should also add a comment that it may be possible to apply diversion to realm routed requests.

SRD> Where?

-- section 2, Throttling: " ... a Diameter Client not sending requests..."

I suggest " ... a Client choosing to not send requests ..."

SRD> A Diameter Client...

-- section 3, 2nd paragraph:

Client, servers, and agents should not be capitalized. Should "Reporting node" and "Reacting node" be hyphenated?  Consider moving the last sentence to the start of the next paragraph.

SRD> The capitalization of Diameter Clients, Diameter Servers and
Diameter agents was Benoit's suggestion to make it explicit what is being referred to.  I don't see the need for hyphenation in this context.  I'm ok with moving the sentence.

-- section 3.1, paragraph 1: " This is made possible by adding overload control AVPs, the OC-OLR AVP and the OC- Supported-Features AVP, as optional AVPs into existing commands..."

I suggest "This is made possible by adding the optional overload control AVPs OC-OLR and OC-Supported-Features into existing commands."

SRD> OK.

-- section 3.1, 3rd paragraph: "Reporting nodes also include overload reports..."

"Reporting nodes _may_ also include overload reports..."

SRD> OK.

-- section 3.1, 4th paragraph: "Clients MAY report..."

Should not be normative in this section.

SRD> Agreed.

-- section 3.2, 6th paragraph: "The OC-Feature-Vector AVP will contain..."

"... will _always_ contain..."

SRD> Ok.

-- section 3.2, 7th paragraph: " ... all answer messages to requests ..."

suggest "... all answers to requests..."

SRD> Ok.

-- section 3.2, paragraph 9: "Reporting nodes are allowed to..."

"Reporting nodes can..."

SRD> Ok.

Also consider clarifying that they can change algorithms _between_transactions_, as long as there's no active overload condition.

-- section 3.2, paragraph 10 (starting with "The individual features..."

Consider moving this entire paragraph to earlier in the section.

-- section 3.2, paragraph 11: "The DCA mechanism must also allow..."

SRD> This paragraph looks redundant.  I suggest removing it.

--> "The DCA mechanism allows..."

"... the agent updates the OC-Supported-Features..." --> " ... the agent can update the OC-Supported-Features..."

SRD> Ok.

-- section 3.3, general:

Much of this section is redundant to stuff in the parent section. I 
suggest reducing the parent section detail, and keeping it here. (This 
may be true for subsequent children of section 3.)

SRD> Do you have specific suggestions?

-- 3.3, third paragraph:

s/ , / : /

SRD> I don't agree.  The commas are there because it is a list.

-- 3.3, paragraph 4:

In this overview, I suggest text saying that HOST_REPORT indicates a 
host report, and just using the term "host report" the rest of the 
time. (Same for realm report)

SRD> Why?

-- 3.3, para 7: "A host-report, for instance, will generally by generated by tracking utilization of resources..."

I suggest "A host-report might be generated by tracking use of resources..."

SRD> OK.

-- 3.3, para 9: " ... are responsible for applying the overload abatement algorithm..."

I suggest " ... apply the abatement algorithm..."

SRD> Ok.

-- 3.4, para 2: " ... the definition of new report types and the definition of new scopes ..."

Aren't these sort of the same thing? That is, you add new scopes by extending report type?

SRD> Can't you have a how report that applies only to sessions on that host?

-- 3.4, para 3:

First two sentences are a bit confusing. A new reader will likely think they contradict, without some explanation that OC-Feature-Vector is a child of OC-S-F.

SRD> They seam clear to me.  Do you have a suggested clarification?

-- 3.4, para 4:

First sentence has already been stated more than once. No need to repeat here.

SRD> The first sentence is there to provide context for the second
sentence.

-- 4.1.1, Para 1: "It MAY include the OC-Feature-Vector AVP."

consider adding  ", as a sub-avp of OC-Supported-Features."

SRD> OK

- 4.1.1, last paragraph: "This behavior is described in ..."

What is the antecedent to "this"? If it's "loss algorithm" behavior, then the reference to section 4.2 should not be needed.

SRD> Agreed.

-- 4.1.2, para 2:

It's probably worth reiterating that the reacting node may not be the server, and this requirement may mean inserting AVPS into answers that came from upstream.

SRD> I don't see the need.  Do you have suggested wording?

-- 4.1.2, para 3: "...response messages ... "

"... _answer_ messages ..."

SRD> OK.

-- 4.1.2, para 7: "If it selects a different algorithm, it MUST...:

This is also true if it needs to announce some other feature that needs to be indicated.

SRD> This paragraph is talking specifically about algorithms and is
needed because the AVP is optional.  Are you suggesting another sentence, another paragraph?  I'm guessing that the case you talk about is already covered elsewhere.

-- 4.1.3, para 3: "... Agent MUST include OC-Supported-Features in request messages it receives..."

I suspect this should say "... requests that it _forwards_" or "_relays_".

SRD> To differentiate between the requests that it rejects.  Ok, I think
relays is the better word.

-- 4.1.3, para 5 and 6:

Is the reporting node section limited to endpoints? If not, the these paragraphs effectively restate normative language about reporting node behavior from that section. Once we've said what a reporting node normatively has to do, we should just be able to say that an agent acting as a reporting node has all the responsibilities of a reporting node, and not restate the normative requirements.

SRD> I'm ok with this but it feels like more than an editorial change to me.

-- 4.1.3, para 7:

The first MAY is a consequence (the complement) of the 2nd MAY. It should at least not be 2119 language, and probably can be omitted entirely.

SRD> Do you have suggested wording?

-- 4.1.3, para 9, last sentence:

Does this mean an agent can only change OC-S-F in an answer if it changed it in the request? I don't think we want that restriction, but the context and "as such," seem to scope the MAY to that situation.

SRD> I don't read it that way.  The first sentence is describing one
reason why an agent might change OC-S-F.  It doesn't say it is the only reason.

-- 4.1.3, para 9: "ambiguity"

I'm not sure that's is the word we want here. An agent could muck things up without being ambiguous. Perhaps "inconsistency"?

SRD> The point is that the reacting nodes and reporting nodes must
unambiguously know what to do.  I think ambiguous is the right word.

-- 4.2.1.1, para 1:

Do I understand correctly that the reacting node only keeps OCS for those combinations that it has actually received an OLR for? If so, that's not clear from the wording.

SRD> Do you have suggested wording?

-- 4.2.1.2, para 1:

Likewise, the reporting node only keeps OCS for actual overload conditions where it sends OLRs?

SRD> Do you have suggested wording?

-- 4.2.1.3, para 2:

Should this combination include origin-host or origin-realm? App-Id?

SRD> I don't understand this.

-- 4.2.1.3,  para 3: ... a reporting node MUST process..."

Should that be "reacting node"?

SRD> Yes.

-- 4.2.1.3, para 4:

Paragraph does not make sense. (I think we've already discussed this one from Ulrich's comments).

SRD> Yes, this is addressed already.

-- 4.2.1.3, 3rd para from end: "... update the OCS entry as being expired."

I suggest language like " invalid" or "terminated". I take "expired" 
to mean "naturally expired", which is different from the case 
described here. There may be subtle behavior difference. (For example, 
a reacting node might choose to log "expirations" differently than 
"explicit terminations".)

SRD> For the context of this specification I think expired works.  
Implementations can differentiate types of expired if they have a reason.  Nothing here prevents that.

-- 4.2.1.4, para 9: "... including the reduction percentage..."

I suggest "... including, for example, the reduction percentage..."

SRD> OK.

-- 4.2.1.4, para 11: " ... MUST update the sequence number ..."

I suggest s / update / increment

SRD> OK.

-- 4.2.2, 2nd to last para:

  I think we need something a bit stronger here. The endpoint needs to take some action that makes sense for the application. The details of that are beyond our scope, but the general need is not.

SRD> We cannot enforce application behavior in a Diameter
specification.   I don't see the need for anything more .  Do you have 
suggested wording?

-- 4.2.3, para 2:

Doesn't this also need to match the scope for the request type? E.g. Destination realm or destination host? For example, a host report for host A would not match OCS for host B, even though both had the same report type and application id.

SRD> I guess this matters when an agent is the reporting node.

-- 4.2.3, paras 8 and 9:

We put the currently less favored approach first, with the favored approach in the following paragraph. I suggest we put the more favored approach first.

SRD> OK.


-- 4.2.3, last para:

An example of what we have in mind could be helpful here.

SRD> I'm open to suggested wording...


-- 4.3, para 4:

We should clarify that this is talking about mandatory to understand for DOIC, but not for the enclosing transaction.

SRD> i'm not clear on what you are suggesting.  Do you have suggested
wording?

-- 4.3, para 5:

Why is it different depending on whether the feature is an algorithm or not? Also, isn't this mostly redundant to the paragraph about new normative behavior?

SRD> I agree, this paragraph can be removed.

-- 4.3, para 6, last sentence

This is redundant to earlier normative language in the section 
(assuming a new report type will always involve new normative 
behavior.)

SRD> I agree, the last sentence can be removed.

-- 4.3, para 7, last sentence

Also redundant

SRD> Agreed.

-- 4.3, last para, last sentence:

It's not clear if this means section 8 of this doc, or 6733. I suggest putting this sentence before the subsequent one.

SRD> OK.

-- 5.1, para 4:

Convoluted paragraph. How about "How about "reporting nodes request the stateless reduction of the number of requests by an indicated percentage."

SRD> Ok.

We should also clarify that this reduction is in comparison to what the reacting node otherwise would have sent, rather than what it may have previously sent.

SRD> Isn't this already covered?  Do you have suggested wording?

-- 5.3, para 5:

Needs a sentence or paragraph to describe the 100% issue before describing how to back down from it.

SRD> It's discussed earlier in the document.  I'm ok with adding it
again.  Do you have suggested wording?

"... following concerns are RECOMMENDED ..."

following procedures...?

SRD> OK.

-- 5.3, para 6: "... does not receive an OLR in messages sent to the formerly overloaded node..."

Do we mean "... does not receive an OLR in answers received from the formerly overloaded node..."?

SRD> Agreed.

-- para 6, last paragraph

Paragraph is off topic for section. It probably belongs in the extensibility section, or at least somewhere other than here.

SRD> Do you mean section 6? This isn't about extensibility but about how
Diameter applications integrate DOIC.  It probably belongs in the intro or overview sections.

-- 6.1, last para:

I think we moved this to 6.2, but forgot to delete it here.

SRD> Yup, already addressed as part of Ulrich's comments.

-- 6.2:

Why did the AVP code jump to TBD6? (Also seems out of order in the 
table.)

SRD> Historical reasons.  Doesn't matter, the real values will be filled
in eventually.

Is it to late to rename the value to OLR_LOSS_ALGO?

SRD> Yes. :-)

-- 9.4, para 2: "A node MUST not..."

"A node MUST _NOT_ ..."

SRD> Ok.

-- References:

5905 and 5729 are not cited in the document.

SRD> Ok.

draft-ietf-dime-e2e-sec-req-00: Outdated version.

SRD> Ok.
























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--------------030308060304070008050806-- From nobody Wed Jan 7 08:51:31 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 08F141A00A3 for ; Wed, 7 Jan 2015 08:51:30 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.121 X-Spam-Level: X-Spam-Status: No, score=-1.121 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_NEUTRAL=0.779] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LOLdlEY5EWge for ; Wed, 7 Jan 2015 08:51:27 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 327E51A0069 for ; Wed, 7 Jan 2015 08:51:27 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:57101 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1Y8tpJ-0003Zw-1q; Wed, 07 Jan 2015 08:51:25 -0800 Message-ID: <54AD6408.6080607@usdonovans.com> Date: Wed, 07 Jan 2015 10:51:20 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: Ben Campbell References: <54912CBA.8080701@gmail.com> <549192FD.7060403@usdonovans.com> <5491BCB3.30608@usdonovans.com> <0EEB7B88-CEEF-4A33-BD61-E4378F0D054D@nostrum.com> <5491CCC9.3090809@usdonovans.com> <4586B22E-3CDD-462E-8246-D55F25F4365C@nostrum.com> <5491F723.6080203@usdonovans.com> <54920272.80508@usdonovans.com> <52901958-73B6-49FE-8DA4-A8D2F8276DD0@nostrum.com> <5BCBA1FC2B7F0B4C9D935572D900066815235CCD@DEMUMBX014.nsn-intra.net> <8FB9C2A7-7D61-4D46-9808-AD17DB61B8CE@nostrum.com> <54AD571C.7060608@usdonovans.com> <77254C21-850E-4169-8FFA-65F2A276D826@nostrum.com> In-Reply-To: <77254C21-850E-4169-8FFA-65F2A276D826@nostrum.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-OutGoing-Spam-Status: No, score=-0.6 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - biz131.inmotionhosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - usdonovans.com X-Get-Message-Sender-Via: biz131.inmotionhosting.com: authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: http://mailarchive.ietf.org/arch/msg/dime/PKms8wEaeP6RxUWNgWQWC4YDfnU Cc: "dime@ietf.org" Subject: Re: [Dime] DOIC WGLC: Changing Algorithms X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Jan 2015 16:51:30 -0000 Yes, reporting nodes cannot depend on consistent capabilities between requests. I don't find were we say that directly (in a very quick look) but it is implied by the fact that OC-S-F MUST be included in all requests and, as such, capabilities announcement does not span transactions. Maybe, in addition to the paragraph below that give guidance for agent based cases, we should add the following in Section 4.1.2 (5.1.2 in DOIC-06) after paragraph 2: "Note: Capability announcement is done per transaction. The reporting node cannot assume that the capabilities announced by a reacting node will be the same between transactions." Regards, Steve On 1/7/15 10:13 AM, Ben Campbell wrote: > I am almost okay with that. But on reflection, I think the issue is broader than described in the first sentence. > > For example (SE == supporting endpoint, NSE == non-supporting endpoint, etc.) > > SE ---- > \ > ----NSA ---- RepNode > SE ---- / > > ... and ... > > NSE ---- > \ > ----SA ---- RepNode > NSE ---- / > > These scenarios look exactly the same from the reporting node's perspective. That is, the Reporting Node cannot tell if it has multiple supporting endpoints with different features, or one supporting agent that is arbitrarily changing its advertised features. You can also run into the issue if all nodes support DOIC, if agents modify OC-S-F. > > So now (and admitting to opinion flapping), I wonder if the guidance should be that the Reporting Node cannot depend on consistent OC capabilities between requests, and must be prepared in general to deal with frequent changes in advertised features. > > >> On Jan 7, 2015, at 9:56 AM, Steve Donovan wrote: >> >> All, >> >> After further discussion with Ben, the recommendation is to NOT include the wording proposed in the attached email. Instead I propose to add the following wording in section 4.1.3 (section 5.1.3 in version -06) after the third paragraph: >> >> Note: When multiple agents are serving as the reacting node for a non supporting >> Diameter endpoint, each of those agents will be advertising capabilities for >> what looks to the reporting node like a single entity. Care should be taken >> to ensure that reporting node behavior is not adversely impacted in this scenario. >> For instance, if frequent changes in advertised features is a concern then >> care needs to be taken to ensure that all agents advertising capabilities for >> a single entity advertise the same DOIC features. >> >> Regards, >> >> Steve >> >> On 12/19/14 1:58 PM, Ben Campbell wrote: >>> Steve and I had an offline discussion, and I think we agree that the reporting node can be forced to change algorithms during an active overload condition, if it gets a request that doesn't advertise support for the active algorithm. >>> >>> We currently have text forbidding the reporting node from changing algorithms during an active overload condition, without making this exception. We assume that we still want to otherwise keep the limitation on algorithm changes during overload. Here's a concrete proposal: >>> >>> In 4.1.2: >>> >>> Old: >>> >>> For an ongoing overload condition, a reporting node MUST NOT change the selected algorithm during the period of time that it is in an overload condition and, as a result, is sending OC-OLR AVPs in answer messages. >>> >>> New: >>> >>> For an ongoing overload condition, a reporting node MUST NOT initiate a change to the selected algorithm during the period of time that it is in an overload condition and, as a result, is sending OC-OLR AVPs in answer messages. This rule does not affect the case where the OC-Supported-Features in a new request matching the OLR does not advertise support for the current algorithm, in which case the reporting node would be forced to change algorithms. However, this rule does constrain the reporting node from changing algorithms simply because the reacting node advertises other algorithms in addition to one currently in use. >>> >>> Added text in 4.1.1: >>> >>> If a reacting node is using an abatement algorithm to abate traffic due to an active OLR from a reporting node, the reacting node SHOULD continue to advertise support for that algorithm in future requests that match the OLR, until the overload condition is terminated. >>> >>> >>>> On Dec 18, 2014, at 11:46 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: >>>> >>>> Ben, Steve, >>>> >>>> Section 4.2.1.2 says: >>>> A reporting node SHOULD maintain OCS entries per supported Diameter >>>> application, per supported (and eventually selected) Abatement >>>> Algorithm and per report-type. >>>> >>>> For example, an HSS would maintain two OCSs for S6a host-type reports, one for loss and one for rate. When receiving a request that advertises only loss, the returned OLR would be the one according to the loss-OCS; When receiving a request that advertises loss and rate, the HSS has two returned OLR would be the one according to the rate-OCS. >>>> >>>> I don't see a problem when algorithm is changed at the reacting node. >>>> >>>> Ulrich >>>> >>>> >>>> >>>> -----Original Message----- >>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben Campbell >>>> Sent: Wednesday, December 17, 2014 11:39 PM >>>> To: Steve Donovan >>>> Cc: dime@ietf.org >>>> Subject: Re: [Dime] DOIC WGLC: Changing Algorithms >>>> >>>> >>>>> On Dec 17, 2014, at 4:23 PM, Steve Donovan wrote: >>>>> >>>>> >>>>> On 12/17/14 3:54 PM, Ben Campbell wrote: >>>>>>> On Dec 17, 2014, at 3:35 PM, Steve Donovan wrote: >>>>>>> >>>>>>> >>>>>>> On 12/17/14 1:00 PM, Ben Campbell wrote: >>>>>>>>> On Dec 17, 2014, at 12:34 PM, Steve Donovan wrote: >>>>>>>>> >>>>>>>>>> Okay, new picture: >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>> On Dec 17, 2014, at 11:26 AM, Steve Donovan >>>>>>>>>>> wrote: >>>>>>>>>>> >>>>>>>>>>> Ben, >>>>>>>>>>> >>>>>>>>>>> The value of the Origin-Host matters greatly here. In both cases, what S needs to know is if there is a reacting node for traffic coming from C1 and if there is a reacting node for traffic coming from C2. >>>>>>>>>>> >>>>>>>>>> There is no assumption in the draft right now that we have a correlation between reacting nodes and clients. That might be required for client-targed OLRs, but we don't have those yet. >>>>>>>>>> >>>>>>>>>> Consider a different picture. In this case, C never supports DOIC. the reacting node role happens either at A1/A2 or at A3, depending on which flow you look at. >>>>>>>>>> >>>>>>>>>> A1--- >>>>>>>>>> / \ >>>>>>>>>> C -- -------A3------S >>>>>>>>>> \ / >>>>>>>>>> A2--- >>>>>>>>>> >>>>>>>>>> Now, assume the same flows, but substitute A1 for C1, A2, for C2, and A3 for A. All requests now have the same origin-host. >>>>>>>>>> >>>>>>>>>> Before you say this is unrealistic: The issue is the same for any situation where one client can send traffic across multiple agents to the same destination. It doesn't matter if there is one or a million. >>>>>>>>>> >>>>>>>>> SRD> Yes, this is nasty. With attribution S can detect the scenario. I'm not sure what it does once it selects it. This can be addressed to some degree by adding a deployment recommendation that all agents taking on reacting node functionality for a single endpoint select the same algorithm. >>>>>>>> I think some sort of attribution is the long-term solution. Another option might be some sort of DCA state identifier, or a combination of the two. (e.g. multiple "virtual" reacting node at the same physical node.) The details will be non-trivial to figure out. >>>>>>>> >>>>>>>> But to close the loop, I think the _short_ term solution is to say that, while a reporting node should not _initiate_ a change in algorithms during an overload condition, it must still handle the situation where the reacting node forces a change. We could go further to say that reacting node also should not initiate such a change, but we would have to recognize that there are scenarios where that guidance cannot be enforced, and the reporting node still has to handle them. >>>>>>>> >>>>>>>> We might need to think about what it means from an OCS perspective for a reporting node to send OLRs with different algorithms (or potentially other capability parameters) for the "same" overload event. >>>>>>> SRD> I think it is a better solution to stay with what we have now. The reporting node MUST NOT change the algorithm during an active overload condition. If a reacting node advertises support for it, the reacting node is saying it will support that algorithm for the duration of any overload condition that happens prior to the reacting node changing the advertised algorithm. The change in advertised algorithm will take effect after the overload condition goes away. >>>>>>> >>>>>> I disagree. I don't think we want to allow the reporting node to ever indicate an algorithm that was not advertised in the request. That violates normative language earlier in the section that says the selected algorithm MUST be one of the ones advertised in the request. It can also cause problems for reacting nodes, where they get OLRs for an algorithm they don't understand. >>>>> SRD> They clearly do understand the algorithm. They advertised it before the overload report started. We can change the normative language to cover this exception. >>>> In my first scenario, this is not true. C2 (or A2) _never_ understood the rate algorithm, and never advertised support for it. >>>> >>>> The whole point of this exercise was to show that the reporting node cannot, in the general case, distinguish between multiple reacting nodes with different capabilities, and a single reacting node that changes capabilities. >>>> >>>> By "general case", I mean no assumption that the reacting nodes are peers with the reporting nodes, and no assumption that you can correlate origin-host values (in requests) to reacting-nodes. >>>> >>>> >>>>> I think the principle of minimizing work on an overloaded reporting node is the more important principle here. If the reacting node changes the advertised set of algorithms during an active overload condition then the overloaded reporting node will be required to send end-of-overload OLRs for the previous algorithm and then send start-of-overload OLRs for the new algorithm. This seems complex at a time the overloaded node should be focusing on getting out of the overload condition. >>>> Sending an OLR that the reacting node does not understand will not help you get out of overload. >>>> >>>> I don't see how this is any more complex that if you simply have multiple reacting nodes with different capabilities--and I don't see how to avoid supporting that case. >>>> >>>>>> I think that's considerably more important that restricting the reporting node from changing algorithms (Which, btw, does no harm with the only algorithms that we are seriously contemplating.We speculate that it might cause harm for some future algorithm.) >>>>> SRD> We already have the restriction on the reporting node. >>>> We already have both restrictions, and they contradict. I believe the _existing_ restriction to not select an algorithm that is not advertised in the request is more important than the _existing_ restriction to not change algorithms during an overload condition. >>>> >>>> >>>>>> Remember, this is not just about a single reacting node changing it's capabilities, it's also about multiple reacting nodes with different capabilities. We can't disallow one without disallowing the other. >>>>> SRD> Multiple reacting nodes with different capabilities is all the more reason to hold things constant during an overload condition. >>>> I don't follow that. You seem to be pushing towards using the same algorithm for all reacting nodes once an overload condition starts. Is that your intent? (Given the possibility that some future reacting node will only support "loss", that "same algorithm" would pretty much always need to be loss.) >>>> >>>>> I'm not proposing disallowing reacting nodes from changing the set of capabilities, I'm proposing that these changes don't take effect while there is an active overload condition. >>>> The problem exists even if no reacting node ever changes its capabilities. >>>> >>>>>>> SRD> I don't think we need to update the OCS in this document to handle multiple algorithms. This can be done in the extension drafts. We might want to make it clear, as it appears it isn't already, that a reacting node might need to support multiple algorithms at the same time. >>>>>> Do you mean reacting or reporting node in the last sentence? Assuming you mean it as written, the problem is not that a reacting node may need to support multiple algorithms at the same time. It's that it may get OLRs that it cannot act upon because it doesn't support the algorithm. >>>>> SRD> I meant reporting nodes. >>>>>> If, otoh, you meant reporting node, I don't understand how a reporting node can have multiple algorithms for the same overload event, without reflecting that possibility in the OCS. >>>>> SRD> Yes, it will need to be reflected in the OCS. We don't have multiple algorithms now so it isn't needed now. I'm saying we might want to say it might me needed in the future. >>>> I'd rather not make each new algorithm redefine the basic structure of OCS. >>>> >>>> But, if you recall, my point was to say we need to _think_ about how this impacts OCS, not that we necessarily need to change anything. Are you opposed to thinking about it? (And no, I don't think this short exchange quite counts as that.) >>>> >>>>>> >>>> _______________________________________________ >>>> DiME mailing list >>>> DiME@ietf.org >>>> https://www.ietf.org/mailman/listinfo/dime >>>> >>>> _______________________________________________ >>>> DiME mailing list >>>> DiME@ietf.org >>>> https://www.ietf.org/mailman/listinfo/dime > From nobody Wed Jan 7 10:47:22 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B85301A0242 for ; Wed, 7 Jan 2015 10:47:19 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.909 X-Spam-Level: X-Spam-Status: No, score=-1.909 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Mmmn_Y00v6_k for ; Wed, 7 Jan 2015 10:47:14 -0800 (PST) Received: from nostrum.com (raven-v6.nostrum.com [IPv6:2001:470:d:1130::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id EC31D1A014C for ; Wed, 7 Jan 2015 10:47:13 -0800 (PST) Received: from [10.0.1.23] (cpe-173-172-146-58.tx.res.rr.com [173.172.146.58]) (authenticated bits=0) by nostrum.com (8.14.9/8.14.7) with ESMTP id t07IlBDV038025 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 7 Jan 2015 12:47:12 -0600 (CST) (envelope-from ben@nostrum.com) X-Authentication-Warning: raven.nostrum.com: Host cpe-173-172-146-58.tx.res.rr.com [173.172.146.58] claimed to be [10.0.1.23] Content-Type: multipart/alternative; boundary="Apple-Mail=_64505CEC-24C0-4C71-996B-CEFB74E4BECD" Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) From: Ben Campbell In-Reply-To: <54AD6408.6080607@usdonovans.com> Date: Wed, 7 Jan 2015 12:47:11 -0600 X-Mao-Original-Outgoing-Id: 442349230.954534-7cf650061c64a161484b99028c454c65 Message-Id: <6BC4E2B9-5A37-495A-8557-F0ABE5857142@nostrum.com> References: <54912CBA.8080701@gmail.com> <549192FD.7060403@usdonovans.com> <5491BCB3.30608@usdonovans.com> <0EEB7B88-CEEF-4A33-BD61-E4378F0D054D@nostrum.com> <5491CCC9.3090809@usdonovans.com> <4586B22E-3CDD-462E-8246-D55F25F4365C@nostrum.com> <5491F723.6080203@usdonovans.com> <54920272.80508@usdonovans.com> <52901958-73B6-49FE-8DA4-A8D2F8276DD0@nostrum.com> <5BCBA1FC2B7F0B4C9D935572D900066815235CCD@DEMUMBX014.nsn-intra.net> <8FB9C2A7-7D61-4D46-9808-AD17DB61B8CE@nostrum.com> <54AD571C.7060608@usdonovans.com> <77254C21-850E-4169-8FFA-65F2A276D826@nostrum.com> <54AD6408.6080607@usdonovans.com> To: Steve Donovan X-Mailer: Apple Mail (2.1993) Archived-At: http://mailarchive.ietf.org/arch/msg/dime/VpnRXbWOmOR6ImWu0cPpA6iQE44 Cc: "dime@ietf.org" Subject: Re: [Dime] DOIC WGLC: Changing Algorithms X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Jan 2015 18:47:19 -0000 --Apple-Mail=_64505CEC-24C0-4C71-996B-CEFB74E4BECD Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 The note in 4.1.2 would be reasonable. Here's a proposed alternative for your previous suggested paragraph: Note: This specification assumes that changes in DOIC node capabilities = are relatively rare events that occur as a result of administrative = action. Reacting nodes ought to minimize changes that force the = reporting node to change the features being used, especially during = active overload conditions. But even if reacting nodes avoid such = changes, reporting nodes still have to be prepared for them to occur. = For example, differing capabilities between multiple reacting nodes may = still force a reporting node to select different features on a = per-transaction basis. If we accept this proposal, it probably should go in 4.1.1, since it=92s = no longer really about agents. > On Jan 7, 2015, at 10:51 AM, Steve Donovan = wrote: >=20 > Yes, reporting nodes cannot depend on consistent capabilities between = requests. I don't find were we say that directly (in a very quick look) = but it is implied by the fact that OC-S-F MUST be included in all = requests and, as such, capabilities announcement does not span = transactions. >=20 > Maybe, in addition to the paragraph below that give guidance for agent = based cases, we should add the following in Section 4.1.2 (5.1.2 in = DOIC-06) after paragraph 2: >=20 > "Note: Capability announcement is done per transaction. The = reporting node cannot assume that the capabilities announced by a = reacting node will be the same between transactions." >=20 > Regards, >=20 > Steve >=20 > On 1/7/15 10:13 AM, Ben Campbell wrote: >> I am almost okay with that. But on reflection, I think the issue is = broader than described in the first sentence. >>=20 >> For example (SE =3D=3D supporting endpoint, NSE =3D=3D non-supporting = endpoint, etc.) >>=20 >> SE ---- >> \ >> ----NSA ---- RepNode >> SE ---- / >>=20 >> ... and ... >>=20 >> NSE ---- >> \ >> ----SA ---- RepNode >> NSE ---- / >>=20 >> These scenarios look exactly the same from the reporting node's = perspective. That is, the Reporting Node cannot tell if it has multiple = supporting endpoints with different features, or one supporting agent = that is arbitrarily changing its advertised features. You can also run = into the issue if all nodes support DOIC, if agents modify OC-S-F. >>=20 >> So now (and admitting to opinion flapping), I wonder if the guidance = should be that the Reporting Node cannot depend on consistent OC = capabilities between requests, and must be prepared in general to deal = with frequent changes in advertised features. >>=20 >>=20 >>> On Jan 7, 2015, at 9:56 AM, Steve Donovan = wrote: >>>=20 >>> All, >>>=20 >>> After further discussion with Ben, the recommendation is to NOT = include the wording proposed in the attached email. Instead I propose = to add the following wording in section 4.1.3 (section 5.1.3 in version = -06) after the third paragraph: >>>=20 >>> Note: When multiple agents are serving as the reacting node = for a non supporting >>> Diameter endpoint, each of those agents will be advertising = capabilities for >>> what looks to the reporting node like a single entity. Care = should be taken >>> to ensure that reporting node behavior is not adversely = impacted in this scenario. >>> For instance, if frequent changes in advertised features is = a concern then >>> care needs to be taken to ensure that all agents = advertising capabilities for >>> a single entity advertise the same DOIC features. >>>=20 >>> Regards, >>>=20 >>> Steve >>>=20 >>> On 12/19/14 1:58 PM, Ben Campbell wrote: >>>> Steve and I had an offline discussion, and I think we agree that = the reporting node can be forced to change algorithms during an active = overload condition, if it gets a request that doesn't advertise support = for the active algorithm. >>>>=20 >>>> We currently have text forbidding the reporting node from changing = algorithms during an active overload condition, without making this = exception. We assume that we still want to otherwise keep the limitation = on algorithm changes during overload. Here's a concrete proposal: >>>>=20 >>>> In 4.1.2: >>>>=20 >>>> Old: >>>>=20 >>>> For an ongoing overload condition, a reporting node MUST NOT change = the selected algorithm during the period of time that it is in an = overload condition and, as a result, is sending OC-OLR AVPs in answer = messages. >>>>=20 >>>> New: >>>>=20 >>>> For an ongoing overload condition, a reporting node MUST NOT = initiate a change to the selected algorithm during the period of time = that it is in an overload condition and, as a result, is sending OC-OLR = AVPs in answer messages. This rule does not affect the case where the = OC-Supported-Features in a new request matching the OLR does not = advertise support for the current algorithm, in which case the reporting = node would be forced to change algorithms. However, this rule does = constrain the reporting node from changing algorithms simply because the = reacting node advertises other algorithms in addition to one currently = in use. >>>>=20 >>>> Added text in 4.1.1: >>>>=20 >>>> If a reacting node is using an abatement algorithm to abate traffic = due to an active OLR from a reporting node, the reacting node SHOULD = continue to advertise support for that algorithm in future requests that = match the OLR, until the overload condition is terminated. >>>>=20 >>>>=20 >>>>> On Dec 18, 2014, at 11:46 AM, Wiehe, Ulrich (NSN - DE/Munich) = wrote: >>>>>=20 >>>>> Ben, Steve, >>>>>=20 >>>>> Section 4.2.1.2 says: >>>>> A reporting node SHOULD maintain OCS entries per supported = Diameter >>>>> application, per supported (and eventually selected) Abatement >>>>> Algorithm and per report-type. >>>>>=20 >>>>> For example, an HSS would maintain two OCSs for S6a host-type = reports, one for loss and one for rate. When receiving a request that = advertises only loss, the returned OLR would be the one according to the = loss-OCS; When receiving a request that advertises loss and rate, the = HSS has two returned OLR would be the one according to the rate-OCS. >>>>>=20 >>>>> I don't see a problem when algorithm is changed at the reacting = node. >>>>>=20 >>>>> Ulrich >>>>>=20 >>>>>=20 >>>>>=20 >>>>> -----Original Message----- >>>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben = Campbell >>>>> Sent: Wednesday, December 17, 2014 11:39 PM >>>>> To: Steve Donovan >>>>> Cc: dime@ietf.org >>>>> Subject: Re: [Dime] DOIC WGLC: Changing Algorithms >>>>>=20 >>>>>=20 >>>>>> On Dec 17, 2014, at 4:23 PM, Steve Donovan = wrote: >>>>>>=20 >>>>>>=20 >>>>>> On 12/17/14 3:54 PM, Ben Campbell wrote: >>>>>>>> On Dec 17, 2014, at 3:35 PM, Steve Donovan = wrote: >>>>>>>>=20 >>>>>>>>=20 >>>>>>>> On 12/17/14 1:00 PM, Ben Campbell wrote: >>>>>>>>>> On Dec 17, 2014, at 12:34 PM, Steve Donovan = wrote: >>>>>>>>>>=20 >>>>>>>>>>> Okay, new picture: >>>>>>>>>>>=20 >>>>>>>>>>>=20 >>>>>>>>>>>> On Dec 17, 2014, at 11:26 AM, Steve Donovan = >>>>>>>>>>>> wrote: >>>>>>>>>>>>=20 >>>>>>>>>>>> Ben, >>>>>>>>>>>>=20 >>>>>>>>>>>> The value of the Origin-Host matters greatly here. In both = cases, what S needs to know is if there is a reacting node for traffic = coming from C1 and if there is a reacting node for traffic coming from = C2. >>>>>>>>>>>>=20 >>>>>>>>>>> There is no assumption in the draft right now that we have a = correlation between reacting nodes and clients. That might be required = for client-targed OLRs, but we don't have those yet. >>>>>>>>>>>=20 >>>>>>>>>>> Consider a different picture. In this case, C never supports = DOIC. the reacting node role happens either at A1/A2 or at A3, depending = on which flow you look at. >>>>>>>>>>>=20 >>>>>>>>>>> A1--- >>>>>>>>>>> / \ >>>>>>>>>>> C -- -------A3------S >>>>>>>>>>> \ / >>>>>>>>>>> A2--- >>>>>>>>>>>=20 >>>>>>>>>>> Now, assume the same flows, but substitute A1 for C1, A2, = for C2, and A3 for A. All requests now have the same origin-host. >>>>>>>>>>>=20 >>>>>>>>>>> Before you say this is unrealistic: The issue is the same = for any situation where one client can send traffic across multiple = agents to the same destination. It doesn't matter if there is one or a = million. >>>>>>>>>>>=20 >>>>>>>>>> SRD> Yes, this is nasty. With attribution S can detect the = scenario. I'm not sure what it does once it selects it. This can be = addressed to some degree by adding a deployment recommendation that all = agents taking on reacting node functionality for a single endpoint = select the same algorithm. >>>>>>>>> I think some sort of attribution is the long-term solution. = Another option might be some sort of DCA state identifier, or a = combination of the two. (e.g. multiple "virtual" reacting node at the = same physical node.) The details will be non-trivial to figure out. >>>>>>>>>=20 >>>>>>>>> But to close the loop, I think the _short_ term solution is to = say that, while a reporting node should not _initiate_ a change in = algorithms during an overload condition, it must still handle the = situation where the reacting node forces a change. We could go further = to say that reacting node also should not initiate such a change, but we = would have to recognize that there are scenarios where that guidance = cannot be enforced, and the reporting node still has to handle them. >>>>>>>>>=20 >>>>>>>>> We might need to think about what it means from an OCS = perspective for a reporting node to send OLRs with different algorithms = (or potentially other capability parameters) for the "same" overload = event. >>>>>>>> SRD> I think it is a better solution to stay with what we have = now. The reporting node MUST NOT change the algorithm during an active = overload condition. If a reacting node advertises support for it, the = reacting node is saying it will support that algorithm for the duration = of any overload condition that happens prior to the reacting node = changing the advertised algorithm. The change in advertised algorithm = will take effect after the overload condition goes away. >>>>>>>>=20 >>>>>>> I disagree. I don't think we want to allow the reporting node to = ever indicate an algorithm that was not advertised in the request. That = violates normative language earlier in the section that says the = selected algorithm MUST be one of the ones advertised in the request. It = can also cause problems for reacting nodes, where they get OLRs for an = algorithm they don't understand. >>>>>> SRD> They clearly do understand the algorithm. They advertised = it before the overload report started. We can change the normative = language to cover this exception. >>>>> In my first scenario, this is not true. C2 (or A2) _never_ = understood the rate algorithm, and never advertised support for it. >>>>>=20 >>>>> The whole point of this exercise was to show that the reporting = node cannot, in the general case, distinguish between multiple reacting = nodes with different capabilities, and a single reacting node that = changes capabilities. >>>>>=20 >>>>> By "general case", I mean no assumption that the reacting nodes = are peers with the reporting nodes, and no assumption that you can = correlate origin-host values (in requests) to reacting-nodes. >>>>>=20 >>>>>=20 >>>>>> I think the principle of minimizing work on an overloaded = reporting node is the more important principle here. If the reacting = node changes the advertised set of algorithms during an active overload = condition then the overloaded reporting node will be required to send = end-of-overload OLRs for the previous algorithm and then send = start-of-overload OLRs for the new algorithm. This seems complex at a = time the overloaded node should be focusing on getting out of the = overload condition. >>>>> Sending an OLR that the reacting node does not understand will not = help you get out of overload. >>>>>=20 >>>>> I don't see how this is any more complex that if you simply have = multiple reacting nodes with different capabilities--and I don't see how = to avoid supporting that case. >>>>>=20 >>>>>>> I think that's considerably more important that restricting the = reporting node from changing algorithms (Which, btw, does no harm with = the only algorithms that we are seriously contemplating.We speculate = that it might cause harm for some future algorithm.) >>>>>> SRD> We already have the restriction on the reporting node. >>>>> We already have both restrictions, and they contradict. I believe = the _existing_ restriction to not select an algorithm that is not = advertised in the request is more important than the _existing_ = restriction to not change algorithms during an overload condition. >>>>>=20 >>>>>=20 >>>>>>> Remember, this is not just about a single reacting node changing = it's capabilities, it's also about multiple reacting nodes with = different capabilities. We can't disallow one without disallowing the = other. >>>>>> SRD> Multiple reacting nodes with different capabilities is all = the more reason to hold things constant during an overload condition. >>>>> I don't follow that. You seem to be pushing towards using the same = algorithm for all reacting nodes once an overload condition starts. Is = that your intent? (Given the possibility that some future reacting node = will only support "loss", that "same algorithm" would pretty much always = need to be loss.) >>>>>=20 >>>>>> I'm not proposing disallowing reacting nodes from changing the = set of capabilities, I'm proposing that these changes don't take effect = while there is an active overload condition. >>>>> The problem exists even if no reacting node ever changes its = capabilities. >>>>>=20 >>>>>>>> SRD> I don't think we need to update the OCS in this document = to handle multiple algorithms. This can be done in the extension = drafts. We might want to make it clear, as it appears it isn't already, = that a reacting node might need to support multiple algorithms at the = same time. >>>>>>> Do you mean reacting or reporting node in the last sentence? = Assuming you mean it as written, the problem is not that a reacting node = may need to support multiple algorithms at the same time. It's that it = may get OLRs that it cannot act upon because it doesn't support the = algorithm. >>>>>> SRD> I meant reporting nodes. >>>>>>> If, otoh, you meant reporting node, I don't understand how a = reporting node can have multiple algorithms for the same overload event, = without reflecting that possibility in the OCS. >>>>>> SRD> Yes, it will need to be reflected in the OCS. We don't have = multiple algorithms now so it isn't needed now. I'm saying we might = want to say it might me needed in the future. >>>>> I'd rather not make each new algorithm redefine the basic = structure of OCS. >>>>>=20 >>>>> But, if you recall, my point was to say we need to _think_ about = how this impacts OCS, not that we necessarily need to change anything. = Are you opposed to thinking about it? (And no, I don't think this short = exchange quite counts as that.) >>>>>=20 >>>>>>>=20 >>>>> _______________________________________________ >>>>> DiME mailing list >>>>> DiME@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/dime >>>>>=20 >>>>> _______________________________________________ >>>>> DiME mailing list >>>>> DiME@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/dime >>=20 >=20 --Apple-Mail=_64505CEC-24C0-4C71-996B-CEFB74E4BECD Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252
The = note in 4.1.2 would be reasonable.

Here's a proposed alternative for your = previous suggested paragraph:

Note: This specification = assumes that changes in DOIC node capabilities are relatively rare = events that occur as a result of administrative action. Reacting nodes = ought to minimize changes that force the reporting node to change the = features being used, especially during active overload conditions. But = even if reacting nodes avoid such changes, reporting nodes still have to = be prepared for them to occur. For example, differing capabilities = between multiple reacting nodes may still force a reporting node to = select different features on a per-transaction = basis.

If we accept this proposal, it probably = should go in 4.1.1, since it=92s no longer really about = agents.


On Jan 7, 2015, at 10:51 = AM, Steve Donovan <srdonovan@usdonovans.com> wrote:

Yes, reporting nodes cannot depend on consistent capabilities = between requests.  I don't find were we say that directly (in a = very quick look) but it is implied by the fact that OC-S-F MUST be = included in all requests and, as such, capabilities announcement does = not span transactions.

Maybe, in addition = to the paragraph below that give guidance for agent based cases, we = should add the following in Section 4.1.2 (5.1.2 in DOIC-06) after = paragraph 2:

 "Note:  Capability = announcement is done per transaction.  The reporting node cannot = assume that the capabilities announced by a reacting node will be the = same between transactions."

Regards,

Steve

On 1/7/15 = 10:13 AM, Ben Campbell wrote:
I am almost okay with that. But on reflection, I think the = issue is broader than described in the first sentence.

For example (SE =3D=3D supporting endpoint, NSE =3D=3D = non-supporting endpoint, etc.)

SE ----
            \
              ----NSA ---- = RepNode
SE ---- /

... and = ...

NSE ----
    =           \
      =           ----SA ---- RepNode
NSE = ---- /

These scenarios look exactly the = same from the reporting node's perspective. That is, the Reporting Node = cannot tell if it has multiple supporting endpoints with different = features, or one supporting agent that is arbitrarily changing its = advertised features.  You can also run into the issue if all nodes = support DOIC, if agents modify OC-S-F.

So now (and admitting to opinion flapping), I wonder if the = guidance should be that the Reporting Node cannot depend on consistent = OC capabilities between requests, and must be prepared in general = to deal with frequent changes in advertised features.


On Jan 7, = 2015, at 9:56 AM, Steve Donovan <srdonovan@usdonovans.com> wrote:

All,

After further discussion = with Ben, the recommendation is to NOT include the wording proposed in = the attached email.  Instead I propose to add the following = wording in section 4.1.3 (section 5.1.3 in version -06) after the = third paragraph:

      =    Note: When multiple agents are serving as the reacting node = for a non supporting
        =  Diameter endpoint, each of those agents will be advertising = capabilities for
         what = looks to the reporting node like a single entity. Care should be = taken
         to ensure that = reporting node behavior is not adversely impacted in this scenario.
         For instance, if frequent = changes in advertised features is a concern then
  =        care needs to be taken to ensure that all = agents advertising capabilities for
      =    a single entity advertise the same DOIC features.

Regards,

Steve

On 12/19/14 1:58 PM, Ben Campbell wrote:
Steve and I had an = offline discussion, and I think we agree that the reporting node can be = forced to change algorithms during an active overload condition, if it = gets a request that doesn't advertise support for the active = algorithm.

We currently have text = forbidding the reporting node from changing algorithms during an active = overload condition, without making this exception. We assume = that we still want to otherwise keep the limitation on algorithm = changes during overload. Here's a concrete proposal:

In 4.1.2:

Old:

For an ongoing overload condition, a reporting node MUST NOT = change the selected algorithm during the period of time that it is in an = overload condition and, as a result, is sending OC-OLR AVPs in = answer messages.

New:

For an ongoing overload condition, a reporting node MUST NOT = initiate a change to the selected algorithm during the period of time = that it is in an overload condition and, as a result, is sending = OC-OLR AVPs in answer messages. This rule does not affect the case where = the OC-Supported-Features in a new request matching the OLR does = not advertise support for the current algorithm, in which case the = reporting node would be forced to change algorithms. However, this = rule does constrain the reporting node from changing algorithms = simply because the reacting node advertises other algorithms in addition = to one currently in use.

Added text in = 4.1.1:

If a reacting node is using an = abatement algorithm to abate traffic due to an active OLR from a = reporting node, the reacting node SHOULD continue to = advertise support for that algorithm in future requests that match = the OLR, until the overload condition is terminated.


On Dec = 18, 2014, at 11:46 AM, Wiehe, Ulrich (NSN - DE/Munich) <ulrich.wiehe@nsn.com> wrote:

Ben, Steve,

Section 4.2.1.2 = says:
  A reporting node SHOULD maintain OCS entries = per supported Diameter
  application, per supported = (and eventually selected) Abatement
  Algorithm and = per report-type.

For example, an HSS would = maintain two OCSs for S6a host-type reports, one for loss and one for = rate. When receiving a request that advertises only loss, = the returned OLR would be the one according to the loss-OCS; When = receiving a request that advertises loss and rate, the HSS has two = returned OLR would be the one according to the rate-OCS.

I don't see a problem when algorithm is = changed at the reacting node.

Ulrich



-----Original = Message-----
From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben = Campbell
Sent: Wednesday, December 17, 2014 11:39 PM
To: Steve Donovan
Cc: dime@ietf.org
Subject: Re: [Dime] DOIC WGLC: Changing Algorithms


On Dec 17, 2014, at 4:23 PM, Steve Donovan <srdonovan@usdonovans.com> wrote:


On 12/17/14 3:54 PM, Ben Campbell wrote:
On Dec 17, 2014, at 3:35 PM, Steve Donovan <srdonovan@usdonovans.com> wrote:


On 12/17/14 1:00 PM, Ben Campbell wrote:
On Dec 17, 2014, at 12:34 PM, Steve Donovan <srdonovan@usdonovans.com> wrote:

Okay, new picture:


On Dec 17, 2014, at 11:26 AM, Steve Donovan <srdonovan@usdonovans.com>
wrote:

Ben,

The value of = the Origin-Host matters greatly here.  In both cases, what S needs = to know is if there is a reacting node for traffic coming from C1 = and if there is a reacting node for traffic coming from C2.

There is no assumption in the = draft right now that we have a correlation between reacting nodes and = clients. That might be required for client-targed OLRs, but we = don't have those yet.

Consider a different = picture. In this case, C never supports DOIC. the reacting node role = happens either at A1/A2 or at A3, depending on which flow you look = at.

       A1---
      /         \
C --             = -------A3------S
      \     =     /
        A2---

Now, assume the same flows, but substitute A1 = for C1, A2, for C2, and A3 for A. All requests now have the same = origin-host.

Before you say this is = unrealistic: The issue is the same for any situation where one client = can send traffic across multiple agents to the same destination. It = doesn't matter if there is one or a million.

SRD> Yes, this is nasty.  With = attribution S can detect the scenario.  I'm not sure what it does = once it selects it.  This can be addressed to some degree by = adding a deployment recommendation that  all agents taking on = reacting node functionality for a single endpoint  select the same = algorithm.
I think some sort of attribution = is the long-term solution. Another option might be some sort of DCA = state identifier, or a combination of the two. (e.g. multiple = "virtual" reacting node at the same physical node.) The details will be = non-trivial to figure out.

But to close the = loop, I think the _short_ term solution is to say that, while a = reporting node should not _initiate_ a change in algorithms during an = overload condition, it must still handle the situation where the = reacting node forces a change. We could go further to say that reacting = node also should not initiate such a change, but we would have to = recognize that there are scenarios where that guidance cannot be = enforced, and the reporting node still has to handle them.

We might need to think about what it means = from an OCS perspective for a reporting node to send OLRs with different = algorithms (or potentially other capability parameters) for the = "same" overload event.
SRD> I think it is = a better solution to stay with what we have now.  The reporting = node MUST NOT change the algorithm during an active = overload condition.  If a reacting node advertises support for = it, the reacting node is saying it will support that algorithm for the = duration of any overload condition that happens prior to the = reacting node changing the advertised algorithm.  The change in = advertised algorithm will take effect after the overload condition = goes away.

I disagree. I = don't think we want to allow the reporting node to ever indicate an = algorithm that was not advertised in the request. That violates = normative language earlier in the section that says the selected = algorithm MUST be one of the ones advertised in the request. It can also = cause problems for reacting nodes, where they get OLRs for an = algorithm they don't understand.
SRD> They = clearly do understand the algorithm.  They advertised it before the = overload report started.  We can change the normative language to = cover this exception.
In my first = scenario, this is not true. C2 (or A2)  _never_ understood the rate = algorithm, and never advertised support for it.

The whole point of this exercise was to show that the = reporting node cannot, in the general case, distinguish between multiple = reacting nodes with different capabilities, and a single reacting = node that changes capabilities.

By "general = case", I mean no assumption that the reacting nodes are peers with the = reporting nodes, and no assumption that you can correlate origin-host = values (in requests) to reacting-nodes.


I think = the principle of minimizing work on an overloaded reporting node is the = more important principle here.  If the reacting node changes the = advertised set of algorithms during an active overload condition = then the overloaded reporting node will be required to send = end-of-overload OLRs for the previous algorithm and then send = start-of-overload OLRs for the new algorithm.  This seems complex = at a time the overloaded node should be focusing on getting out of the = overload condition.
Sending an OLR that = the reacting node does not understand will not help you get out of = overload.

I don't see how this is any more = complex that if you simply have multiple reacting nodes with different = capabilities--and I don't see how to avoid supporting that case.

I think that's considerably more important = that restricting the reporting node from changing algorithms (Which, = btw, does no harm with the only algorithms that we are seriously = contemplating.We speculate that it might cause harm for some future = algorithm.)
SRD> We already have the = restriction on the reporting node.
We already = have both restrictions, and they contradict. I believe the _existing_ = restriction to not select an algorithm that is not advertised in the = request is more important than the _existing_ restriction to not = change algorithms during an overload condition.


Remember, this is not just about a single = reacting node changing it's capabilities, it's also about multiple = reacting nodes with different capabilities. We can't disallow one = without disallowing the other.
SRD> = Multiple reacting nodes with different capabilities is all the more = reason to hold things constant during an overload condition.
I don't follow that. You seem to be pushing = towards using the same algorithm for all reacting nodes once an overload = condition starts. Is that your intent?  (Given the possibility = that some future reacting node will only support "loss", that "same = algorithm" would pretty much always need to be loss.)

I'm not proposing = disallowing reacting nodes from changing the set of capabilities, I'm = proposing that these changes don't take effect while there is an = active overload condition.
The problem = exists even if no reacting node ever changes its capabilities.

SRD> I = don't think we need to update the OCS in this document to handle = multiple algorithms.  This can be done in the extension drafts. =  We might want to make it clear, as it appears it isn't = already, that a reacting node might need to support multiple algorithms = at the same time.
Do you mean reacting or = reporting node in the last sentence? Assuming you mean it as written, = the problem is not that a reacting node may need to = support multiple algorithms at the same time. It's that it may get = OLRs that it cannot act upon because it doesn't support the = algorithm.
SRD> I meant reporting = nodes.
If, otoh, you = meant reporting node, I don't understand how a reporting node can have = multiple algorithms for the same overload event, without reflecting = that possibility in the OCS.
SRD> = Yes, it will need to be reflected in the OCS.  We don't have = multiple algorithms now so it isn't needed now.  I'm saying we = might want to say it might me needed in the future.
I'd rather not make each new algorithm redefine = the basic structure of OCS.

But, if you = recall, my point was to say we need to _think_ about how this impacts = OCS, not that we necessarily need to change anything. Are you opposed = to thinking about it? (And no, I don't think this short exchange = quite counts as that.)


_____________________________________= __________
DiME mailing list
DiME@ietf.org
https://www.ietf.org/mailman/listinfo/dime

_______________________________________________
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https://www.ietf.org/mailman/listinfo/dime



= --Apple-Mail=_64505CEC-24C0-4C71-996B-CEFB74E4BECD-- From nobody Wed Jan 7 11:57:34 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id EDB3E1A1AA2 for ; Wed, 7 Jan 2015 11:57:32 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.91 X-Spam-Level: X-Spam-Status: No, score=-1.91 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HZS9Se4f_Oj1 for ; Wed, 7 Jan 2015 11:57:30 -0800 (PST) Received: from nostrum.com (raven-v6.nostrum.com [IPv6:2001:470:d:1130::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9C7A51A1AA4 for ; Wed, 7 Jan 2015 11:57:30 -0800 (PST) Received: from [10.0.1.23] (cpe-173-172-146-58.tx.res.rr.com [173.172.146.58]) (authenticated bits=0) by nostrum.com (8.14.9/8.14.7) with ESMTP id t07JvSqm044064 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 7 Jan 2015 13:57:30 -0600 (CST) (envelope-from ben@nostrum.com) X-Authentication-Warning: raven.nostrum.com: Host cpe-173-172-146-58.tx.res.rr.com [173.172.146.58] claimed to be [10.0.1.23] Content-Type: text/plain; charset=windows-1252 Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) From: Ben Campbell In-Reply-To: <54AD53B3.3060902@usdonovans.com> Date: Wed, 7 Jan 2015 13:57:28 -0600 X-Mao-Original-Outgoing-Id: 442353448.687288-c8972802d9da4f2b6c028b9ff325a897 Content-Transfer-Encoding: quoted-printable Message-Id: <79A41609-512F-4F54-9812-E6B5DA8DC1FD@nostrum.com> References: <0AF415BD-4AA8-4A4F-942B-29DA6C9E417B@nostrum.com> <549193B8.6000603@usdonovans.com> <5491B2BB.30709@usdonovans.com> <3543DB65-DFC1-4ADE-8808-7B931F325F92@nostrum.com> <5491CE28.2020205@usdonovans.com> <0E11AEDD-6E90-4D61-8759-557B8596BAFB@nostrum.com> <54920B37.4060201@gmail.com> <2BE199F8-262D-40AB-A567-A857E94B3A6A@nostrum.com> <5BCBA1FC2B7F0B4C9D935572D900066815235C94@DEMUMBX014.nsn-intra.net> <54A1840D.5050403@usdonovans.com> <54AD53B3.3060902@usdonovans.com> To: Steve Donovan X-Mailer: Apple Mail (2.1993) Archived-At: http://mailarchive.ietf.org/arch/msg/dime/xUwl5eo5M2xDq24RiG1R2vGoVGY Cc: dime@ietf.org Subject: Re: [Dime] DOIC WGLC: duration unit X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Jan 2015 19:57:33 -0000 Oops, I missed your original call for objections in the post-holiday = deluge. For the record, I agree with both the unit and the limit. > On Jan 7, 2015, at 9:41 AM, Steve Donovan = wrote: >=20 > I am making these changes in DOIC-06. >=20 > We will need another WGLC. If there are objections to this it can be = addressed during that WGLC. >=20 > Steve >=20 > On 12/29/14 10:40 AM, Steve Donovan wrote: >> It appears that we are moving toward consensus to move back to = seconds. If we do then I agree that a 24 hour maximum is reasonable. >>=20 >> Does anyone object to moving back to seconds with a 24 hour maximum? >>=20 >> Regards, >>=20 >> Steve >>=20 >> On 12/22/14 3:59 PM, TROTTIN, JEAN-JACQUES (JEAN-JACQUES) wrote: >>> Dear all >>>=20 >>> I am also ,in favor to take the second as unit (according to Ben 's = arguments), and also to have a upper limit. The limit that Ben gives is = about 50 days. Is 24 hours too short? >>>=20 >>> Best regards >>>=20 >>> JJacques >>>=20 >>> -----Message d'origine----- >>> De : DiME [mailto:dime-bounces@ietf.org] De la part de Ben Campbell >>> Envoy=E9 : vendredi 19 d=E9cembre 2014 00:47 >>> =C0 : Wiehe, Ulrich (NSN - DE/Munich) >>> Cc : dime@ietf.org >>> Objet : Re: [Dime] DOIC WGLC: duration unit >>>=20 >>> Hi Ulrich, >>>=20 >>> You bring up a good point that we need to document the limits, or at = least describe the implications of choosing to long or short of a = duration either way. I suspect 1s is still too short for most = situations, and ( 2^32 - 1 / 1000 )s is probably still too long. >>>=20 >>> (Don't get me wrong; I still think millisecond resolution for this = is silly.) >>>=20 >>> Thanks! >>>=20 >>> Ben. >>>=20 >>>> On Dec 18, 2014, at 11:11 AM, Wiehe, Ulrich (NSN - DE/Munich) = wrote: >>>>=20 >>>> Ben, >>>>=20 >>>> my inclination is to change back to seconds. However, seconds allow = a maximum value that is 1000 times higher and may be regarded = unreasonably high. In a previous version of the draft we had an upper = limit, and maybe when going back to seconds we should re-introduce an = upper limit so that the protocol does not allow unreasonably long = durations. >>>>=20 >>>> Ulrich >>>>=20 >>>>=20 >>>> -----Original Message----- >>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben = Campbell >>>> Sent: Thursday, December 18, 2014 12:08 AM >>>> To: Jouni Korhonen >>>> Cc: dime@ietf.org >>>> Subject: Re: [Dime] DOIC WGLC: duration unit >>>>=20 >>>>=20 >>>>> On Dec 17, 2014, at 5:01 PM, Jouni Korhonen = wrote: >>>>>=20 >>>>> [snip] >>>>>=20 >>>>>>> I'll step out of the argument and let someone else be champion = for millisecond granularity. >>>>>> Any other takers? Are there real use cases for sub-second = precision? >>>>> I do not really care. We changed that from seconds to milliseconds = for some reason.. but no not see a reason to change it back either. >>>> I'd argue that we should make it the "right thing", regardless of = whether we changed it before. (Although remembering why might go far to = answering my last question below.) >>>>=20 >>>> I've describe why I think it is false precision, and can become = harmful. To rephrase it, choosing too small of durations will cause harm = by forcing rapid OLR updates (as in many per second.) These updates = cause work for both reporting nodes and reacting nodes. >>>>=20 >>>> We could offer guidance of how to avoid that harm. Or we could = choose a resolution that makes it harder to cause such harm in the first = place. I think good protocol design favors the later. >>>>=20 >>>> Do you disagree with the potential for harm? Or do you see some use = case for sub-second precision that I've missed? >>>>=20 >>>>=20 >>>> _______________________________________________ >>>> DiME mailing list >>>> DiME@ietf.org >>>> https://www.ietf.org/mailman/listinfo/dime >>> _______________________________________________ >>> DiME mailing list >>> DiME@ietf.org >>> https://www.ietf.org/mailman/listinfo/dime >>>=20 >>> _______________________________________________ >>> DiME mailing list >>> DiME@ietf.org >>> https://www.ietf.org/mailman/listinfo/dime >>>=20 >>=20 >> _______________________________________________ >> DiME mailing list >> DiME@ietf.org >> https://www.ietf.org/mailman/listinfo/dime >>=20 >=20 > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime From nobody Wed Jan 7 12:54:55 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4E0CA1A1B75 for ; Wed, 7 Jan 2015 12:54:54 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.91 X-Spam-Level: X-Spam-Status: No, score=-1.91 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3KP7SZwqe1zH for ; Wed, 7 Jan 2015 12:54:51 -0800 (PST) Received: from nostrum.com (raven-v6.nostrum.com [IPv6:2001:470:d:1130::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id AEA3E1A1B64 for ; Wed, 7 Jan 2015 12:54:51 -0800 (PST) Received: from [10.0.1.23] (cpe-173-172-146-58.tx.res.rr.com [173.172.146.58]) (authenticated bits=0) by nostrum.com (8.14.9/8.14.7) with ESMTP id t07KsoKA048715 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 7 Jan 2015 14:54:51 -0600 (CST) (envelope-from ben@nostrum.com) X-Authentication-Warning: raven.nostrum.com: Host cpe-173-172-146-58.tx.res.rr.com [173.172.146.58] claimed to be [10.0.1.23] Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) From: Ben Campbell In-Reply-To: <087A34937E64E74E848732CFF8354B92098808EC@ESESSMB101.ericsson.se> Date: Wed, 7 Jan 2015 14:54:49 -0600 X-Mao-Original-Outgoing-Id: 442356889.656898-a5a31f34e4a912ce3e070998336fa6f6 Content-Transfer-Encoding: quoted-printable Message-Id: <08B99F05-1FF9-45D8-8979-879FACA25C53@nostrum.com> References: <46C8B155-A8B0-41F6-A8A5-6F21D61ADE9E@nostrum.com> <087A34937E64E74E848732CFF8354B920987F783@ESESSMB101.ericsson.se> <767BF9E5-A72B-44B5-A324-A0CF74F70A69@nostrum.com> <087A34937E64E74E848732CFF8354B92098808EC@ESESSMB101.ericsson.se> To: "dime@ietf.org list" X-Mailer: Apple Mail (2.1993) Archived-At: http://mailarchive.ietf.org/arch/msg/dime/x_71wllt4pD2dWzI59eT0MC30Gw Subject: Re: [Dime] Updated DOIC Requirements Analysis X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Jan 2015 20:54:54 -0000 (Catching up on older stuff) Comments inline. But keep in mind that the detailed requirements are to = be removed from the RFC, so I'm not sure we need to spend too much time = on them. (Only the first discussion point addresses text that is to = remain in the RFC.) Thanks! Ben. > On Dec 12, 2014, at 2:24 AM, Maria Cruz Bartolome = wrote: >=20 > Hello Ben, >=20 > See comments below > Thanks > /MCruz >=20 >>=20 >> C.2. Detection of non-supporting Intermediaries >>=20 >> The DOIC mechanism as currently defined does not allow supporting >> nodes to automatically determine whether OC-Supported-Features or = OC- >> OLR AVPs are originated by a peer node, or by a non-peer node and >> sent across a non-supporting peer. This makes it impossible to >> detect the presence of non-supporting nodes between supporting = nodes, >> except by configuration. The working group determined that such a >> configuration requirement is acceptable. >>=20 >> This limits full compliance with certain requirements related to = the >> limitation of new configuration, deployment in environments with >> mixed support, operating across non-supporting agents, and >> authorization. >> [MCruz] I think this paragraph should state what are the limitations=20= >> (generally, like you did for rest of them) Morever, since detailed = descriptions will be deleted. >>=20 >=20 > The limitations are discussed in the security consideration section. = Basically if a node expects an agent to enforce any DOIC related policy = (e.g. making sure DOIC avps do not leak to unauthorized nodes), it has = to know that the agent itself supports DOIC. Right now it can only know = that by having an administrator tell it that (violating the limitation = on new configuration), by knowing that all agents in the network support = DOIC (violating the mixed support and non-supporting agent = requirements.) > [MCruz] Please, include text accordingly then. The text now "certain = requirements related to" does not provide an information that anyone = could trace easily. I was explicitly asked by other people (e.g. Lionel) to list the = impacted requirements descriptively, rather than by reference, in this = section. The "certain requirements related to" are described by the = words immediately after that phrase. That is, the requirement to limit = new configuration, the requirement to allow deployments with mixed = support, and the requirements to authorize who can send and receive = overload information. >=20 >>=20 >>=20 >>=20 >> REQ 6: The solution designers SHOULD seek to minimize the amount = of >> new configuration required in order to work. For example, = it >> is better to allow peers to advertise or negotiate support >> for the solution, rather than to require that this = knowledge >> to be configured at each node. >>=20 >> *Partially Compliant*. Most DOIC parameters are advertised >> using the DOIC capability announcement mechanism. However, >> there are some situations where configuration is required. >> For example, a DOIC node detect the fact that a peer may = not >> support DOIC when nodes on the other side of the non- >> supporting node do support DOIC without configuration. >>=20 >> [MCruz] Could you clarify last example? =E2=80=9Cwithoug = configuration=E2=80=9D? I do not understand what you meant. >=20 > Here's an example: >=20 > C ------ A ------ S >=20 > If both C and S support DOIC, there is no way for them to tell whether = A supports DOIC. Consider two cases: >=20 > 1) A supports DOIC. But since C already inserts OC-S-F in all = requests, and S inserts it in all answers, A passes them through = unchanged. > 2) A does not support DOIC, but passes through unknown AVPs. Since = OC-S-F will be unknown to it, it passes it through unchanged. >=20 > =46rom the perspective of C and S, the requests and answers look = identical for both cases. Even if A actually changes the content of an = OC-S-F avp, neither endpoint can tell if the resulting AVP came from A = or the opposite endpoint. >=20 > Personally, I think this is a showstopper. But the working group = consensus did not agree. >=20 > [MCruz] Several comments: > a) Then you consider this requirement as "partly compliant" since you = consider configuration is required in a node to identify whether or not = its adjacent peers support DOIC, right? If so, could you explain why a = node needs to know whether or not the peer support DOIC, a part from = what is included in the advertisement mechanism we defined? If you do not know that a peer supports DOIC, you cannot assume that it = will enforce DOIC related policies (I believe that is sufficiently = described in the security configurations.) > b) What do you think is a "show stopper"? The need for configuration?=20= Explicitly, the need to configure whether you can trust a peer to = enforce DOIC related polices. I believe this is an important security = issue, and that being unable to determine it automatically is a real = problem. Requiring this sort of configuration doesn't scale well, and = has the potential of creating real management and operations problems. = (Note the IETF area that DIME is in.) But, as I said, the working group seems to have chosen to move forward = without an automatic way to do this. Perhaps it can be improved in a = future extension. >=20 >=20 >=20 >>=20 >> REQ 23: The solution MUST provide sufficient information to enable = a >> load-balancing node to divert messages that are rejected or >> otherwise throttled by an overloaded upstream node to other >> upstream nodes that are the most likely to have sufficient >> capacity to process them. >>=20 >> *Not Compliant*. DOIC provides no built in mechanism to >> determine the best place to divert messages that would >> otherwise be throttled. This can be accomplished with a >> future "load" extension, or with proprietary load balancing >> mechanisms. >>=20 >> [MCruz] Partly Compliant. DOIC Overload information can be used = already by proprietary load-balancing implementations. >>=20 >> Load information will be a plus to this. >>=20 >=20 > I disagree, or at least think that would be _very_ partial. You won't = have any overload information unless the potential diversion targets are = also overloaded. > [MCruz] In case servers in the pools are DOIC enabled the Overload = information is provided by all of them, under overload occurrences, then = this information is valid (maybe not sufficient in all cases, I agree, = but valid in most of them) to divert. > In case we have mixed servers (DOIC-supporting and non-DOIC) we have = some limitations as well. The purpose behind this requirement was to allow load balancing of = requests that are diverted to (hopefully) non-overloaded servers, in a = way that reduces the chance of causing those servers to also become = overloaded. Those servers will not be providing OLRs. I still do not agree that the corner case of diverting request to = _overloaded_ servers is big enough to consider this partially compliant. >=20 >=20 >>=20 >>=20 >> REQ 30: The solution MUST NOT interfere with any Diameter-compliant >> method that a node may use to protect itself from overload >> from non-supporting nodes or from denial-of-service = attacks. >>=20 >> *Compliant*. The specification recommends that any such >> protection mechanism needed without DOIC should continue to >> be employed with DOIC. >> [MCruz] Could you point our where in the draft it is described? >=20 > 9.3 > [MCruz] I do not think 9.3 says what you mentioned here. > It says "In the absence of an overload control mechanism...". It is = not said the DOIC shall not interfere with any other Diameter method for = protection, we may need to add this information to the draft in fact. > A part from that, I think 9.3. should say "for non-DOIC supporting = nodes/networks..." not just "in the absence of _an_ overload control = mechanism"... The "absence of an OC strategy" part is there to provide the context = that these protection mechanisms existed, or needed to exist, prior to = the availability of DOIC. The section goes on to say that, even with = DOIC, these protections are still needed to deal with non-compliant = nodes. Are you arguing that we don't comply with Req 30? (Keeping in mind that = this text is to be removed from the RFC.) >=20 >=20 >=20 >=20 >=20 > /Ben. >=20 > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime From nobody Wed Jan 7 12:54:56 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E15D11A1B64 for ; Wed, 7 Jan 2015 12:54:54 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.91 X-Spam-Level: X-Spam-Status: No, score=-1.91 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id L6nw4joI_7Xm for ; Wed, 7 Jan 2015 12:54:52 -0800 (PST) Received: from nostrum.com (raven-v6.nostrum.com [IPv6:2001:470:d:1130::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2B4101A1B72 for ; Wed, 7 Jan 2015 12:54:52 -0800 (PST) Received: from [10.0.1.23] (cpe-173-172-146-58.tx.res.rr.com [173.172.146.58]) (authenticated bits=0) by nostrum.com (8.14.9/8.14.7) with ESMTP id t07KsoKB048715 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 7 Jan 2015 14:54:51 -0600 (CST) (envelope-from ben@nostrum.com) X-Authentication-Warning: raven.nostrum.com: Host cpe-173-172-146-58.tx.res.rr.com [173.172.146.58] claimed to be [10.0.1.23] Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) From: Ben Campbell In-Reply-To: <087A34937E64E74E848732CFF8354B92098808EC@ESESSMB101.ericsson.se> Date: Wed, 7 Jan 2015 14:54:51 -0600 X-Mao-Original-Outgoing-Id: 442356889.740782-765234c883600a5cd672c629db9e09f9 Content-Transfer-Encoding: quoted-printable Message-Id: <3E51B540-A69F-44EA-A35B-DC1A4AC3A9E5@nostrum.com> References: <46C8B155-A8B0-41F6-A8A5-6F21D61ADE9E@nostrum.com> <087A34937E64E74E848732CFF8354B920987F783@ESESSMB101.ericsson.se> <767BF9E5-A72B-44B5-A324-A0CF74F70A69@nostrum.com> <087A34937E64E74E848732CFF8354B92098808EC@ESESSMB101.ericsson.se> To: "dime@ietf.org list" X-Mailer: Apple Mail (2.1993) Archived-At: http://mailarchive.ietf.org/arch/msg/dime/7ok7McvY2FD8Izp0L68gvg_Nv0I Subject: Re: [Dime] Updated DOIC Requirements Analysis X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Jan 2015 20:54:55 -0000 (Catching up on older stuff) Comments inline. But keep in mind that the detailed requirements are to = be removed from the RFC, so I'm not sure we need to spend too much time = on them. (Only the first discussion point addresses text that is to = remain in the RFC.) Thanks! Ben. > On Dec 12, 2014, at 2:24 AM, Maria Cruz Bartolome = wrote: >=20 > Hello Ben, >=20 > See comments below > Thanks > /MCruz >=20 >>=20 >> C.2. Detection of non-supporting Intermediaries >>=20 >> The DOIC mechanism as currently defined does not allow supporting >> nodes to automatically determine whether OC-Supported-Features or = OC- >> OLR AVPs are originated by a peer node, or by a non-peer node and >> sent across a non-supporting peer. This makes it impossible to >> detect the presence of non-supporting nodes between supporting = nodes, >> except by configuration. The working group determined that such a >> configuration requirement is acceptable. >>=20 >> This limits full compliance with certain requirements related to = the >> limitation of new configuration, deployment in environments with >> mixed support, operating across non-supporting agents, and >> authorization. >> [MCruz] I think this paragraph should state what are the limitations=20= >> (generally, like you did for rest of them) Morever, since detailed = descriptions will be deleted. >>=20 >=20 > The limitations are discussed in the security consideration section. = Basically if a node expects an agent to enforce any DOIC related policy = (e.g. making sure DOIC avps do not leak to unauthorized nodes), it has = to know that the agent itself supports DOIC. Right now it can only know = that by having an administrator tell it that (violating the limitation = on new configuration), by knowing that all agents in the network support = DOIC (violating the mixed support and non-supporting agent = requirements.) > [MCruz] Please, include text accordingly then. The text now "certain = requirements related to" does not provide an information that anyone = could trace easily. I was explicitly asked by other people (e.g. Lionel) to list the = impacted requirements descriptively, rather than by reference, in this = section. The "certain requirements related to" are described by the = words immediately after that phrase. That is, the requirement to limit = new configuration, the requirement to allow deployments with mixed = support, and the requirements to authorize who can send and receive = overload information. >=20 >>=20 >>=20 >>=20 >> REQ 6: The solution designers SHOULD seek to minimize the amount = of >> new configuration required in order to work. For example, = it >> is better to allow peers to advertise or negotiate support >> for the solution, rather than to require that this = knowledge >> to be configured at each node. >>=20 >> *Partially Compliant*. Most DOIC parameters are advertised >> using the DOIC capability announcement mechanism. However, >> there are some situations where configuration is required. >> For example, a DOIC node detect the fact that a peer may = not >> support DOIC when nodes on the other side of the non- >> supporting node do support DOIC without configuration. >>=20 >> [MCruz] Could you clarify last example? =E2=80=9Cwithoug = configuration=E2=80=9D? I do not understand what you meant. >=20 > Here's an example: >=20 > C ------ A ------ S >=20 > If both C and S support DOIC, there is no way for them to tell whether = A supports DOIC. Consider two cases: >=20 > 1) A supports DOIC. But since C already inserts OC-S-F in all = requests, and S inserts it in all answers, A passes them through = unchanged. > 2) A does not support DOIC, but passes through unknown AVPs. Since = OC-S-F will be unknown to it, it passes it through unchanged. >=20 > =46rom the perspective of C and S, the requests and answers look = identical for both cases. Even if A actually changes the content of an = OC-S-F avp, neither endpoint can tell if the resulting AVP came from A = or the opposite endpoint. >=20 > Personally, I think this is a showstopper. But the working group = consensus did not agree. >=20 > [MCruz] Several comments: > a) Then you consider this requirement as "partly compliant" since you = consider configuration is required in a node to identify whether or not = its adjacent peers support DOIC, right? If so, could you explain why a = node needs to know whether or not the peer support DOIC, a part from = what is included in the advertisement mechanism we defined? If you do not know that a peer supports DOIC, you cannot assume that it = will enforce DOIC related policies (I believe that is sufficiently = described in the security configurations.) > b) What do you think is a "show stopper"? The need for configuration?=20= Explicitly, the need to configure whether you can trust a peer to = enforce DOIC related polices. I believe this is an important security = issue, and that being unable to determine it automatically is a real = problem. Requiring this sort of configuration doesn't scale well, and = has the potential of creating real management and operations problems. = (Note the IETF area that DIME is in.) But, as I said, the working group seems to have chosen to move forward = without an automatic way to do this. Perhaps it can be improved in a = future extension. >=20 >=20 >=20 >>=20 >> REQ 23: The solution MUST provide sufficient information to enable = a >> load-balancing node to divert messages that are rejected or >> otherwise throttled by an overloaded upstream node to other >> upstream nodes that are the most likely to have sufficient >> capacity to process them. >>=20 >> *Not Compliant*. DOIC provides no built in mechanism to >> determine the best place to divert messages that would >> otherwise be throttled. This can be accomplished with a >> future "load" extension, or with proprietary load balancing >> mechanisms. >>=20 >> [MCruz] Partly Compliant. DOIC Overload information can be used = already by proprietary load-balancing implementations. >>=20 >> Load information will be a plus to this. >>=20 >=20 > I disagree, or at least think that would be _very_ partial. You won't = have any overload information unless the potential diversion targets are = also overloaded. > [MCruz] In case servers in the pools are DOIC enabled the Overload = information is provided by all of them, under overload occurrences, then = this information is valid (maybe not sufficient in all cases, I agree, = but valid in most of them) to divert. > In case we have mixed servers (DOIC-supporting and non-DOIC) we have = some limitations as well. The purpose behind this requirement was to allow load balancing of = requests that are diverted to (hopefully) non-overloaded servers, in a = way that reduces the chance of causing those servers to also become = overloaded. Those servers will not be providing OLRs. I still do not agree that the corner case of diverting request to = _overloaded_ servers is big enough to consider this partially compliant. >=20 >=20 >>=20 >>=20 >> REQ 30: The solution MUST NOT interfere with any Diameter-compliant >> method that a node may use to protect itself from overload >> from non-supporting nodes or from denial-of-service = attacks. >>=20 >> *Compliant*. The specification recommends that any such >> protection mechanism needed without DOIC should continue to >> be employed with DOIC. >> [MCruz] Could you point our where in the draft it is described? >=20 > 9.3 > [MCruz] I do not think 9.3 says what you mentioned here. > It says "In the absence of an overload control mechanism...". It is = not said the DOIC shall not interfere with any other Diameter method for = protection, we may need to add this information to the draft in fact. > A part from that, I think 9.3. should say "for non-DOIC supporting = nodes/networks..." not just "in the absence of _an_ overload control = mechanism"... The "absence of an OC strategy" part is there to provide the context = that these protection mechanisms existed, or needed to exist, prior to = the availability of DOIC. The section goes on to say that, even with = DOIC, these protections are still needed to deal with non-compliant = nodes. Are you arguing that we don't comply with Req 30? (Keeping in mind that = this text is to be removed from the RFC.) >=20 >=20 >=20 >=20 >=20 > /Ben. >=20 > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime From nobody Wed Jan 7 14:36:35 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ABA191A1BB1 for ; Wed, 7 Jan 2015 14:36:31 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.12 X-Spam-Level: X-Spam-Status: No, score=-1.12 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, SPF_NEUTRAL=0.779] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Y-nbAnnEnQPs for ; Wed, 7 Jan 2015 14:36:26 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7B6611A1B93 for ; Wed, 7 Jan 2015 14:36:26 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:53835 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1Y8zD9-0007NC-Rf; Wed, 07 Jan 2015 14:36:24 -0800 Message-ID: <54ADB4E3.4070902@usdonovans.com> Date: Wed, 07 Jan 2015 16:36:19 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: Ben Campbell References: <54912CBA.8080701@gmail.com> <549192FD.7060403@usdonovans.com> <5491BCB3.30608@usdonovans.com> <0EEB7B88-CEEF-4A33-BD61-E4378F0D054D@nostrum.com> <5491CCC9.3090809@usdonovans.com> <4586B22E-3CDD-462E-8246-D55F25F4365C@nostrum.com> <5491F723.6080203@usdonovans.com> <54920272.80508@usdonovans.com> <52901958-73B6-49FE-8DA4-A8D2F8276DD0@nostrum.com> <5BCBA1FC2B7F0B4C9D935572D900066815235CCD@DEMUMBX014.nsn-intra.net> <8FB9C2A7-7D61-4D46-9808-AD17DB61B8CE@nostrum.com> <54AD571C.7060608@usdonovans.com> <77254C21-850E-4169-8FFA-65F2A276D826@nostrum.com> <54AD6408.6080607@usdonovans.com> <6BC4E2B9-5A37-495A-8557-F0ABE5857142@nostrum.com> In-Reply-To: <6BC4E2B9-5A37-495A-8557-F0ABE5857142@nostrum.com> Content-Type: multipart/alternative; boundary="------------010509040004030903070901" X-OutGoing-Spam-Status: No, score=-0.6 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - biz131.inmotionhosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - usdonovans.com X-Get-Message-Sender-Via: biz131.inmotionhosting.com: authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: http://mailarchive.ietf.org/arch/msg/dime/PkkUvzXVmP0C_ox58H66njyemFE Cc: "dime@ietf.org" Subject: Re: [Dime] DOIC WGLC: Changing Algorithms X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Jan 2015 22:36:32 -0000 This is a multi-part message in MIME format. --------------010509040004030903070901 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit I'm good with this. Steve On 1/7/15 12:47 PM, Ben Campbell wrote: > The note in 4.1.2 would be reasonable. > > Here's a proposed alternative for your previous suggested paragraph: > > Note: This specification assumes that changes in DOIC node > capabilities are relatively rare events that occur as a result of > administrative action. Reacting nodes ought to minimize changes > that force the reporting node to change the features being used, > especially during active overload conditions. But even if reacting > nodes avoid such changes, reporting nodes still have to be > prepared for them to occur. For example, differing capabilities > between multiple reacting nodes may still force a reporting node > to select different features on a per-transaction basis. > > > If we accept this proposal, it probably should go in 4.1.1, since it’s > no longer really about agents. > > >> On Jan 7, 2015, at 10:51 AM, Steve Donovan > > wrote: >> >> Yes, reporting nodes cannot depend on consistent capabilities between >> requests. I don't find were we say that directly (in a very quick >> look) but it is implied by the fact that OC-S-F MUST be included in >> all requests and, as such, capabilities announcement does not span >> transactions. >> >> Maybe, in addition to the paragraph below that give guidance for >> agent based cases, we should add the following in Section 4.1.2 >> (5.1.2 in DOIC-06) after paragraph 2: >> >> "Note: Capability announcement is done per transaction. The >> reporting node cannot assume that the capabilities announced by a >> reacting node will be the same between transactions." >> >> Regards, >> >> Steve >> >> On 1/7/15 10:13 AM, Ben Campbell wrote: >>> I am almost okay with that. But on reflection, I think the issue is >>> broader than described in the first sentence. >>> >>> For example (SE == supporting endpoint, NSE == non-supporting >>> endpoint, etc.) >>> >>> SE ---- >>> \ >>> ----NSA ---- RepNode >>> SE ---- / >>> >>> ... and ... >>> >>> NSE ---- >>> \ >>> ----SA ---- RepNode >>> NSE ---- / >>> >>> These scenarios look exactly the same from the reporting node's >>> perspective. That is, the Reporting Node cannot tell if it has >>> multiple supporting endpoints with different features, or one >>> supporting agent that is arbitrarily changing its advertised >>> features. You can also run into the issue if all nodes support >>> DOIC, if agents modify OC-S-F. >>> >>> So now (and admitting to opinion flapping), I wonder if the guidance >>> should be that the Reporting Node cannot depend on consistent OC >>> capabilities between requests, and must be prepared in general to >>> deal with frequent changes in advertised features. >>> >>> >>>> On Jan 7, 2015, at 9:56 AM, Steve Donovan >>> > wrote: >>>> >>>> All, >>>> >>>> After further discussion with Ben, the recommendation is to NOT >>>> include the wording proposed in the attached email. Instead I >>>> propose to add the following wording in section 4.1.3 (section >>>> 5.1.3 in version -06) after the third paragraph: >>>> >>>> Note: When multiple agents are serving as the reacting >>>> node for a non supporting >>>> Diameter endpoint, each of those agents will be >>>> advertising capabilities for >>>> what looks to the reporting node like a single entity. >>>> Care should be taken >>>> to ensure that reporting node behavior is not adversely >>>> impacted in this scenario. >>>> For instance, if frequent changes in advertised features >>>> is a concern then >>>> care needs to be taken to ensure that all agents >>>> advertising capabilities for >>>> a single entity advertise the same DOIC features. >>>> >>>> Regards, >>>> >>>> Steve >>>> >>>> On 12/19/14 1:58 PM, Ben Campbell wrote: >>>>> Steve and I had an offline discussion, and I think we agree that >>>>> the reporting node can be forced to change algorithms during an >>>>> active overload condition, if it gets a request that doesn't >>>>> advertise support for the active algorithm. >>>>> >>>>> We currently have text forbidding the reporting node from changing >>>>> algorithms during an active overload condition, without making >>>>> this exception. We assume that we still want to otherwise keep the >>>>> limitation on algorithm changes during overload. Here's a concrete >>>>> proposal: >>>>> >>>>> In 4.1.2: >>>>> >>>>> Old: >>>>> >>>>> For an ongoing overload condition, a reporting node MUST NOT >>>>> change the selected algorithm during the period of time that it is >>>>> in an overload condition and, as a result, is sending OC-OLR AVPs >>>>> in answer messages. >>>>> >>>>> New: >>>>> >>>>> For an ongoing overload condition, a reporting node MUST NOT >>>>> initiate a change to the selected algorithm during the period of >>>>> time that it is in an overload condition and, as a result, is >>>>> sending OC-OLR AVPs in answer messages. This rule does not affect >>>>> the case where the OC-Supported-Features in a new request matching >>>>> the OLR does not advertise support for the current algorithm, in >>>>> which case the reporting node would be forced to change >>>>> algorithms. However, this rule does constrain the reporting node >>>>> from changing algorithms simply because the reacting node >>>>> advertises other algorithms in addition to one currently in use. >>>>> >>>>> Added text in 4.1.1: >>>>> >>>>> If a reacting node is using an abatement algorithm to abate >>>>> traffic due to an active OLR from a reporting node, the reacting >>>>> node SHOULD continue to advertise support for that algorithm in >>>>> future requests that match the OLR, until the overload condition >>>>> is terminated. >>>>> >>>>> >>>>>> On Dec 18, 2014, at 11:46 AM, Wiehe, Ulrich (NSN - DE/Munich) >>>>>> > wrote: >>>>>> >>>>>> Ben, Steve, >>>>>> >>>>>> Section 4.2.1.2 says: >>>>>> A reporting node SHOULD maintain OCS entries per supported Diameter >>>>>> application, per supported (and eventually selected) Abatement >>>>>> Algorithm and per report-type. >>>>>> >>>>>> For example, an HSS would maintain two OCSs for S6a host-type >>>>>> reports, one for loss and one for rate. When receiving a request >>>>>> that advertises only loss, the returned OLR would be the one >>>>>> according to the loss-OCS; When receiving a request that >>>>>> advertises loss and rate, the HSS has two returned OLR would be >>>>>> the one according to the rate-OCS. >>>>>> >>>>>> I don't see a problem when algorithm is changed at the reacting node. >>>>>> >>>>>> Ulrich >>>>>> >>>>>> >>>>>> >>>>>> -----Original Message----- >>>>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben >>>>>> Campbell >>>>>> Sent: Wednesday, December 17, 2014 11:39 PM >>>>>> To: Steve Donovan >>>>>> Cc: dime@ietf.org >>>>>> Subject: Re: [Dime] DOIC WGLC: Changing Algorithms >>>>>> >>>>>> >>>>>>> On Dec 17, 2014, at 4:23 PM, Steve Donovan >>>>>>> > wrote: >>>>>>> >>>>>>> >>>>>>> On 12/17/14 3:54 PM, Ben Campbell wrote: >>>>>>>>> On Dec 17, 2014, at 3:35 PM, Steve Donovan >>>>>>>>> > >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>> >>>>>>>>> On 12/17/14 1:00 PM, Ben Campbell wrote: >>>>>>>>>>> On Dec 17, 2014, at 12:34 PM, Steve Donovan >>>>>>>>>>> > >>>>>>>>>>> wrote: >>>>>>>>>>> >>>>>>>>>>>> Okay, new picture: >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>>> On Dec 17, 2014, at 11:26 AM, Steve Donovan >>>>>>>>>>>>> > >>>>>>>>>>>>> wrote: >>>>>>>>>>>>> >>>>>>>>>>>>> Ben, >>>>>>>>>>>>> >>>>>>>>>>>>> The value of the Origin-Host matters greatly here. In >>>>>>>>>>>>> both cases, what S needs to know is if there is a reacting >>>>>>>>>>>>> node for traffic coming from C1 and if there is a reacting >>>>>>>>>>>>> node for traffic coming from C2. >>>>>>>>>>>>> >>>>>>>>>>>> There is no assumption in the draft right now that we have >>>>>>>>>>>> a correlation between reacting nodes and clients. That >>>>>>>>>>>> might be required for client-targed OLRs, but we don't have >>>>>>>>>>>> those yet. >>>>>>>>>>>> >>>>>>>>>>>> Consider a different picture. In this case, C never >>>>>>>>>>>> supports DOIC. the reacting node role happens either at >>>>>>>>>>>> A1/A2 or at A3, depending on which flow you look at. >>>>>>>>>>>> >>>>>>>>>>>> A1--- >>>>>>>>>>>> / \ >>>>>>>>>>>> C -- -------A3------S >>>>>>>>>>>> \ / >>>>>>>>>>>> A2--- >>>>>>>>>>>> >>>>>>>>>>>> Now, assume the same flows, but substitute A1 for C1, A2, >>>>>>>>>>>> for C2, and A3 for A. All requests now have the same >>>>>>>>>>>> origin-host. >>>>>>>>>>>> >>>>>>>>>>>> Before you say this is unrealistic: The issue is the same >>>>>>>>>>>> for any situation where one client can send traffic across >>>>>>>>>>>> multiple agents to the same destination. It doesn't matter >>>>>>>>>>>> if there is one or a million. >>>>>>>>>>>> >>>>>>>>>>> SRD> Yes, this is nasty. With attribution S can detect the >>>>>>>>>>> scenario. I'm not sure what it does once it selects it. >>>>>>>>>>> This can be addressed to some degree by adding a deployment >>>>>>>>>>> recommendation that all agents taking on reacting node >>>>>>>>>>> functionality for a single endpoint select the same algorithm. >>>>>>>>>> I think some sort of attribution is the long-term solution. >>>>>>>>>> Another option might be some sort of DCA state identifier, or >>>>>>>>>> a combination of the two. (e.g. multiple "virtual" reacting >>>>>>>>>> node at the same physical node.) The details will be >>>>>>>>>> non-trivial to figure out. >>>>>>>>>> >>>>>>>>>> But to close the loop, I think the _short_ term solution is >>>>>>>>>> to say that, while a reporting node should not _initiate_ a >>>>>>>>>> change in algorithms during an overload condition, it must >>>>>>>>>> still handle the situation where the reacting node forces a >>>>>>>>>> change. We could go further to say that reacting node also >>>>>>>>>> should not initiate such a change, but we would have to >>>>>>>>>> recognize that there are scenarios where that guidance cannot >>>>>>>>>> be enforced, and the reporting node still has to handle them. >>>>>>>>>> >>>>>>>>>> We might need to think about what it means from an OCS >>>>>>>>>> perspective for a reporting node to send OLRs with different >>>>>>>>>> algorithms (or potentially other capability parameters) for >>>>>>>>>> the "same" overload event. >>>>>>>>> SRD> I think it is a better solution to stay with what we have >>>>>>>>> now. The reporting node MUST NOT change the algorithm during >>>>>>>>> an active overload condition. If a reacting node advertises >>>>>>>>> support for it, the reacting node is saying it will support >>>>>>>>> that algorithm for the duration of any overload condition >>>>>>>>> that happens prior to the reacting node changing the >>>>>>>>> advertised algorithm. The change in advertised algorithm will >>>>>>>>> take effect after the overload condition goes away. >>>>>>>>> >>>>>>>> I disagree. I don't think we want to allow the reporting node >>>>>>>> to ever indicate an algorithm that was not advertised in the >>>>>>>> request. That violates normative language earlier in the >>>>>>>> section that says the selected algorithm MUST be one of the >>>>>>>> ones advertised in the request. It can also cause problems for >>>>>>>> reacting nodes, where they get OLRs for an algorithm they don't >>>>>>>> understand. >>>>>>> SRD> They clearly do understand the algorithm. They advertised >>>>>>> it before the overload report started. We can change the >>>>>>> normative language to cover this exception. >>>>>> In my first scenario, this is not true. C2 (or A2) _never_ >>>>>> understood the rate algorithm, and never advertised support for it. >>>>>> >>>>>> The whole point of this exercise was to show that the reporting >>>>>> node cannot, in the general case, distinguish between multiple >>>>>> reacting nodes with different capabilities, and a single reacting >>>>>> node that changes capabilities. >>>>>> >>>>>> By "general case", I mean no assumption that the reacting nodes >>>>>> are peers with the reporting nodes, and no assumption that you >>>>>> can correlate origin-host values (in requests) to reacting-nodes. >>>>>> >>>>>> >>>>>>> I think the principle of minimizing work on an overloaded >>>>>>> reporting node is the more important principle here. If the >>>>>>> reacting node changes the advertised set of algorithms during an >>>>>>> active overload condition then the overloaded reporting node >>>>>>> will be required to send end-of-overload OLRs for the previous >>>>>>> algorithm and then send start-of-overload OLRs for the new >>>>>>> algorithm. This seems complex at a time the overloaded node >>>>>>> should be focusing on getting out of the overload condition. >>>>>> Sending an OLR that the reacting node does not understand will >>>>>> not help you get out of overload. >>>>>> >>>>>> I don't see how this is any more complex that if you simply have >>>>>> multiple reacting nodes with different capabilities--and I don't >>>>>> see how to avoid supporting that case. >>>>>> >>>>>>>> I think that's considerably more important that restricting the >>>>>>>> reporting node from changing algorithms (Which, btw, does no >>>>>>>> harm with the only algorithms that we are seriously >>>>>>>> contemplating.We speculate that it might cause harm for some >>>>>>>> future algorithm.) >>>>>>> SRD> We already have the restriction on the reporting node. >>>>>> We already have both restrictions, and they contradict. I believe >>>>>> the _existing_ restriction to not select an algorithm that is not >>>>>> advertised in the request is more important than the _existing_ >>>>>> restriction to not change algorithms during an overload condition. >>>>>> >>>>>> >>>>>>>> Remember, this is not just about a single reacting node >>>>>>>> changing it's capabilities, it's also about multiple reacting >>>>>>>> nodes with different capabilities. We can't disallow one >>>>>>>> without disallowing the other. >>>>>>> SRD> Multiple reacting nodes with different capabilities is all >>>>>>> the more reason to hold things constant during an overload >>>>>>> condition. >>>>>> I don't follow that. You seem to be pushing towards using the >>>>>> same algorithm for all reacting nodes once an overload condition >>>>>> starts. Is that your intent? (Given the possibility that some >>>>>> future reacting node will only support "loss", that "same >>>>>> algorithm" would pretty much always need to be loss.) >>>>>> >>>>>>> I'm not proposing disallowing reacting nodes from changing the >>>>>>> set of capabilities, I'm proposing that these changes don't take >>>>>>> effect while there is an active overload condition. >>>>>> The problem exists even if no reacting node ever changes its >>>>>> capabilities. >>>>>> >>>>>>>>> SRD> I don't think we need to update the OCS in this document >>>>>>>>> to handle multiple algorithms. This can be done in the >>>>>>>>> extension drafts. We might want to make it clear, as it >>>>>>>>> appears it isn't already, that a reacting node might need to >>>>>>>>> support multiple algorithms at the same time. >>>>>>>> Do you mean reacting or reporting node in the last sentence? >>>>>>>> Assuming you mean it as written, the problem is not that a >>>>>>>> reacting node may need to support multiple algorithms at the >>>>>>>> same time. It's that it may get OLRs that it cannot act upon >>>>>>>> because it doesn't support the algorithm. >>>>>>> SRD> I meant reporting nodes. >>>>>>>> If, otoh, you meant reporting node, I don't understand how a >>>>>>>> reporting node can have multiple algorithms for the same >>>>>>>> overload event, without reflecting that possibility in the OCS. >>>>>>> SRD> Yes, it will need to be reflected in the OCS. We don't >>>>>>> have multiple algorithms now so it isn't needed now. I'm saying >>>>>>> we might want to say it might me needed in the future. >>>>>> I'd rather not make each new algorithm redefine the basic >>>>>> structure of OCS. >>>>>> >>>>>> But, if you recall, my point was to say we need to _think_ about >>>>>> how this impacts OCS, not that we necessarily need to change >>>>>> anything. Are you opposed to thinking about it? (And no, I don't >>>>>> think this short exchange quite counts as that.) >>>>>> >>>>>>>> >>>>>> _______________________________________________ >>>>>> DiME mailing list >>>>>> DiME@ietf.org >>>>>> https://www.ietf.org/mailman/listinfo/dime >>>>>> >>>>>> _______________________________________________ >>>>>> DiME mailing list >>>>>> DiME@ietf.org >>>>>> https://www.ietf.org/mailman/listinfo/dime >>> >> > --------------010509040004030903070901 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit I'm good with this.

Steve

On 1/7/15 12:47 PM, Ben Campbell wrote:
The note in 4.1.2 would be reasonable.

Here's a proposed alternative for your previous suggested paragraph:

Note: This specification assumes that changes in DOIC node capabilities are relatively rare events that occur as a result of administrative action. Reacting nodes ought to minimize changes that force the reporting node to change the features being used, especially during active overload conditions. But even if reacting nodes avoid such changes, reporting nodes still have to be prepared for them to occur. For example, differing capabilities between multiple reacting nodes may still force a reporting node to select different features on a per-transaction basis.

If we accept this proposal, it probably should go in 4.1.1, since it’s no longer really about agents.


On Jan 7, 2015, at 10:51 AM, Steve Donovan <srdonovan@usdonovans.com> wrote:

Yes, reporting nodes cannot depend on consistent capabilities between requests.  I don't find were we say that directly (in a very quick look) but it is implied by the fact that OC-S-F MUST be included in all requests and, as such, capabilities announcement does not span transactions.

Maybe, in addition to the paragraph below that give guidance for agent based cases, we should add the following in Section 4.1.2 (5.1.2 in DOIC-06) after paragraph 2:

 "Note:  Capability announcement is done per transaction.  The reporting node cannot assume that the capabilities announced by a reacting node will be the same between transactions."

Regards,

Steve

On 1/7/15 10:13 AM, Ben Campbell wrote:
I am almost okay with that. But on reflection, I think the issue is broader than described in the first sentence.

For example (SE == supporting endpoint, NSE == non-supporting endpoint, etc.)

SE ----
            \
              ----NSA ---- RepNode
SE ---- /

... and ...

NSE ----
              \
                ----SA ---- RepNode
NSE ---- /

These scenarios look exactly the same from the reporting node's perspective. That is, the Reporting Node cannot tell if it has multiple supporting endpoints with different features, or one supporting agent that is arbitrarily changing its advertised features.  You can also run into the issue if all nodes support DOIC, if agents modify OC-S-F.

So now (and admitting to opinion flapping), I wonder if the guidance should be that the Reporting Node cannot depend on consistent OC capabilities between requests, and must be prepared in general to deal with frequent changes in advertised features.


On Jan 7, 2015, at 9:56 AM, Steve Donovan <srdonovan@usdonovans.com> wrote:

All,

After further discussion with Ben, the recommendation is to NOT include the wording proposed in the attached email.  Instead I propose to add the following wording in section 4.1.3 (section 5.1.3 in version -06) after the third paragraph:

         Note: When multiple agents are serving as the reacting node for a non supporting
         Diameter endpoint, each of those agents will be advertising capabilities for
         what looks to the reporting node like a single entity. Care should be taken
         to ensure that reporting node behavior is not adversely impacted in this scenario.
         For instance, if frequent changes in advertised features is a concern then
         care needs to be taken to ensure that all agents advertising capabilities for
         a single entity advertise the same DOIC features.

Regards,

Steve

On 12/19/14 1:58 PM, Ben Campbell wrote:
Steve and I had an offline discussion, and I think we agree that the reporting node can be forced to change algorithms during an active overload condition, if it gets a request that doesn't advertise support for the active algorithm.

We currently have text forbidding the reporting node from changing algorithms during an active overload condition, without making this exception. We assume that we still want to otherwise keep the limitation on algorithm changes during overload. Here's a concrete proposal:

In 4.1.2:

Old:

For an ongoing overload condition, a reporting node MUST NOT change the selected algorithm during the period of time that it is in an overload condition and, as a result, is sending OC-OLR AVPs in answer messages.

New:

For an ongoing overload condition, a reporting node MUST NOT initiate a change to the selected algorithm during the period of time that it is in an overload condition and, as a result, is sending OC-OLR AVPs in answer messages. This rule does not affect the case where the OC-Supported-Features in a new request matching the OLR does not advertise support for the current algorithm, in which case the reporting node would be forced to change algorithms. However, this rule does constrain the reporting node from changing algorithms simply because the reacting node advertises other algorithms in addition to one currently in use.

Added text in 4.1.1:

If a reacting node is using an abatement algorithm to abate traffic due to an active OLR from a reporting node, the reacting node SHOULD continue to advertise support for that algorithm in future requests that match the OLR, until the overload condition is terminated.


On Dec 18, 2014, at 11:46 AM, Wiehe, Ulrich (NSN - DE/Munich) <ulrich.wiehe@nsn.com> wrote:

Ben, Steve,

Section 4.2.1.2 says:
  A reporting node SHOULD maintain OCS entries per supported Diameter
  application, per supported (and eventually selected) Abatement
  Algorithm and per report-type.

For example, an HSS would maintain two OCSs for S6a host-type reports, one for loss and one for rate. When receiving a request that advertises only loss, the returned OLR would be the one according to the loss-OCS; When receiving a request that advertises loss and rate, the HSS has two returned OLR would be the one according to the rate-OCS.

I don't see a problem when algorithm is changed at the reacting node.

Ulrich



-----Original Message-----
From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben Campbell
Sent: Wednesday, December 17, 2014 11:39 PM
To: Steve Donovan
Cc: dime@ietf.org
Subject: Re: [Dime] DOIC WGLC: Changing Algorithms


On Dec 17, 2014, at 4:23 PM, Steve Donovan <srdonovan@usdonovans.com> wrote:


On 12/17/14 3:54 PM, Ben Campbell wrote:
On Dec 17, 2014, at 3:35 PM, Steve Donovan <srdonovan@usdonovans.com> wrote:


On 12/17/14 1:00 PM, Ben Campbell wrote:
On Dec 17, 2014, at 12:34 PM, Steve Donovan <srdonovan@usdonovans.com> wrote:

Okay, new picture:


On Dec 17, 2014, at 11:26 AM, Steve Donovan <srdonovan@usdonovans.com>
wrote:

Ben,

The value of the Origin-Host matters greatly here.  In both cases, what S needs to know is if there is a reacting node for traffic coming from C1 and if there is a reacting node for traffic coming from C2.

There is no assumption in the draft right now that we have a correlation between reacting nodes and clients. That might be required for client-targed OLRs, but we don't have those yet.

Consider a different picture. In this case, C never supports DOIC. the reacting node role happens either at A1/A2 or at A3, depending on which flow you look at.

       A1---
      /         \
C --             -------A3------S
      \         /
        A2---

Now, assume the same flows, but substitute A1 for C1, A2, for C2, and A3 for A. All requests now have the same origin-host.

Before you say this is unrealistic: The issue is the same for any situation where one client can send traffic across multiple agents to the same destination. It doesn't matter if there is one or a million.

SRD> Yes, this is nasty.  With attribution S can detect the scenario.  I'm not sure what it does once it selects it.  This can be addressed to some degree by adding a deployment recommendation that  all agents taking on reacting node functionality for a single endpoint  select the same algorithm.
I think some sort of attribution is the long-term solution. Another option might be some sort of DCA state identifier, or a combination of the two. (e.g. multiple "virtual" reacting node at the same physical node.) The details will be non-trivial to figure out.

But to close the loop, I think the _short_ term solution is to say that, while a reporting node should not _initiate_ a change in algorithms during an overload condition, it must still handle the situation where the reacting node forces a change. We could go further to say that reacting node also should not initiate such a change, but we would have to recognize that there are scenarios where that guidance cannot be enforced, and the reporting node still has to handle them.

We might need to think about what it means from an OCS perspective for a reporting node to send OLRs with different algorithms (or potentially other capability parameters) for the "same" overload event.
SRD> I think it is a better solution to stay with what we have now.  The reporting node MUST NOT change the algorithm during an active overload condition.  If a reacting node advertises support for it, the reacting node is saying it will support that algorithm for the duration of any overload condition that happens prior to the reacting node changing the advertised algorithm.  The change in advertised algorithm will take effect after the overload condition goes away.

I disagree. I don't think we want to allow the reporting node to ever indicate an algorithm that was not advertised in the request. That violates normative language earlier in the section that says the selected algorithm MUST be one of the ones advertised in the request. It can also cause problems for reacting nodes, where they get OLRs for an algorithm they don't understand.
SRD> They clearly do understand the algorithm.  They advertised it before the overload report started.  We can change the normative language to cover this exception.
In my first scenario, this is not true. C2 (or A2)  _never_ understood the rate algorithm, and never advertised support for it.

The whole point of this exercise was to show that the reporting node cannot, in the general case, distinguish between multiple reacting nodes with different capabilities, and a single reacting node that changes capabilities.

By "general case", I mean no assumption that the reacting nodes are peers with the reporting nodes, and no assumption that you can correlate origin-host values (in requests) to reacting-nodes.


I think the principle of minimizing work on an overloaded reporting node is the more important principle here.  If the reacting node changes the advertised set of algorithms during an active overload condition then the overloaded reporting node will be required to send end-of-overload OLRs for the previous algorithm and then send start-of-overload OLRs for the new algorithm.  This seems complex at a time the overloaded node should be focusing on getting out of the overload condition.
Sending an OLR that the reacting node does not understand will not help you get out of overload.

I don't see how this is any more complex that if you simply have multiple reacting nodes with different capabilities--and I don't see how to avoid supporting that case.

I think that's considerably more important that restricting the reporting node from changing algorithms (Which, btw, does no harm with the only algorithms that we are seriously contemplating.We speculate that it might cause harm for some future algorithm.)
SRD> We already have the restriction on the reporting node.
We already have both restrictions, and they contradict. I believe the _existing_ restriction to not select an algorithm that is not advertised in the request is more important than the _existing_ restriction to not change algorithms during an overload condition.


Remember, this is not just about a single reacting node changing it's capabilities, it's also about multiple reacting nodes with different capabilities. We can't disallow one without disallowing the other.
SRD> Multiple reacting nodes with different capabilities is all the more reason to hold things constant during an overload condition.
I don't follow that. You seem to be pushing towards using the same algorithm for all reacting nodes once an overload condition starts. Is that your intent?  (Given the possibility that some future reacting node will only support "loss", that "same algorithm" would pretty much always need to be loss.)

I'm not proposing disallowing reacting nodes from changing the set of capabilities, I'm proposing that these changes don't take effect while there is an active overload condition.
The problem exists even if no reacting node ever changes its capabilities.

SRD> I don't think we need to update the OCS in this document to handle multiple algorithms.  This can be done in the extension drafts.  We might want to make it clear, as it appears it isn't already, that a reacting node might need to support multiple algorithms at the same time.
Do you mean reacting or reporting node in the last sentence? Assuming you mean it as written, the problem is not that a reacting node may need to support multiple algorithms at the same time. It's that it may get OLRs that it cannot act upon because it doesn't support the algorithm.
SRD> I meant reporting nodes.
If, otoh, you meant reporting node, I don't understand how a reporting node can have multiple algorithms for the same overload event, without reflecting that possibility in the OCS.
SRD> Yes, it will need to be reflected in the OCS.  We don't have multiple algorithms now so it isn't needed now.  I'm saying we might want to say it might me needed in the future.
I'd rather not make each new algorithm redefine the basic structure of OCS.

But, if you recall, my point was to say we need to _think_ about how this impacts OCS, not that we necessarily need to change anything. Are you opposed to thinking about it? (And no, I don't think this short exchange quite counts as that.)


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--------------010509040004030903070901-- From nobody Thu Jan 8 03:57:33 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 841AC1A1BDD for ; Thu, 8 Jan 2015 03:57:31 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.511 X-Spam-Level: X-Spam-Status: No, score=-14.511 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id EBOfJPcgumpJ for ; Thu, 8 Jan 2015 03:57:29 -0800 (PST) Received: from aer-iport-1.cisco.com (aer-iport-1.cisco.com [173.38.203.51]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C1C151ACD24 for ; Thu, 8 Jan 2015 03:57:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=957; q=dns/txt; s=iport; t=1420718248; x=1421927848; h=message-id:date:from:mime-version:to:cc:subject: content-transfer-encoding; bh=D9Df02Cs1smtdY3db+eQLXOuiRVrVKOb+brLCh160do=; b=NhpfJq2Tndwwk2oKSriCFa3AZFAhvK/lZHhVAkn7DgMd8ftX01XKGYOL r9b7pgg6YJXR1QiNmsVqMLHZmlU+YidNpE2OyGHASU9W6LuhZF/3bC1cR sBZgkNDJQBnLIGUo7qCytPhHIW5Fw90nSYe5Mj2Tjmm5Oni85Fa3jzBwD k=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AswEAHpvrlStJssW/2dsb2JhbABcg1hYxgKFc4FWAQEBAQF9hEtAATwWGAMCAQIBSw0BBwEBiCgNxi8BAQEBAQEBAwEBAQEBAQEXBI8oAQFPhDABBJN5g0GBDoJxgheIH4M5IoNvPTEBgQuBNwEBAQ X-IronPort-AV: E=Sophos;i="5.07,722,1413244800"; d="scan'208";a="304331825" Received: from aer-iport-nat.cisco.com (HELO aer-core-2.cisco.com) ([173.38.203.22]) by aer-iport-1.cisco.com with ESMTP; 08 Jan 2015 11:57:26 +0000 Received: from [10.60.67.84] (ams-bclaise-8913.cisco.com [10.60.67.84]) by aer-core-2.cisco.com (8.14.5/8.14.5) with ESMTP id t08BvQl7008607; Thu, 8 Jan 2015 11:57:26 GMT Message-ID: <54AE70A5.6070407@cisco.com> Date: Thu, 08 Jan 2015 12:57:25 +0100 From: Benoit Claise User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.7.0 MIME-Version: 1.0 To: dime mailing list Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Archived-At: Subject: [Dime] DIME WG transition to Kathleen as Responsible AD X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Jan 2015 11:57:31 -0000 Dear all, In order to execute the IESG YANG Model Work Redistribution plan (see https://www.ietf.org/mail-archive/web/ietf/current/msg90926.html) and in accordance with the IETF areas re-organisation steps (see https://www.ietf.org/mail-archive/web/ietf/current/msg91015.html), Kathleen Moriarty will become the DIME responsible AD. You will be in good hands with Kathleen. Note that DIME WG will remain in the OPS area. While Kathleen will be the responsible starting now, this change will only appear on the charter page in a little bit (we're targeting mid February). Indeed, the tooling aspects will have to checked: we might face a few issues when a non-OPS AD is responsible for an OPS WG. I don't disappear from the IESG and I'm always available if you require my help, but Kathleen is now your responsible AD. It was a pleasure being your AD for the last 3 years. Please continue the good work. Regards, Benoit From nobody Thu Jan 8 04:44:14 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 909EC1ACD3E for ; Thu, 8 Jan 2015 04:44:10 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.909 X-Spam-Level: X-Spam-Status: No, score=-6.909 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id nPaGD63V666i for ; Thu, 8 Jan 2015 04:44:04 -0800 (PST) Received: from smtp-fr.alcatel-lucent.com (fr-hpgre-esg-01.alcatel-lucent.com [135.245.210.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9FDAB1A3BA7 for ; Thu, 8 Jan 2015 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[127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A9EF71A8AA9 for ; Thu, 8 Jan 2015 07:47:18 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.121 X-Spam-Level: X-Spam-Status: No, score=-1.121 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_NEUTRAL=0.779] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PuNjLXc3fjgH for ; Thu, 8 Jan 2015 07:47:16 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 730B31A8AA2 for ; Thu, 8 Jan 2015 07:47:16 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:63815 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1Y9FIk-0008k2-BI for dime@ietf.org; Thu, 08 Jan 2015 07:47:15 -0800 Message-ID: <54AEA67E.5090601@usdonovans.com> Date: Thu, 08 Jan 2015 09:47:10 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: dime@ietf.org References: <46C8B155-A8B0-41F6-A8A5-6F21D61ADE9E@nostrum.com> <087A34937E64E74E848732CFF8354B920987F783@ESESSMB101.ericsson.se> <767BF9E5-A72B-44B5-A324-A0CF74F70A69@nostrum.com> <087A34937E64E74E848732CFF8354B92098808EC@ESESSMB101.ericsson.se> <08B99F05-1FF9-45D8-8979-879FACA25C53@nostrum.com> In-Reply-To: <08B99F05-1FF9-45D8-8979-879FACA25C53@nostrum.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-OutGoing-Spam-Status: No, score=-0.6 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - biz131.inmotionhosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - usdonovans.com X-Get-Message-Sender-Via: biz131.inmotionhosting.com: authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: Subject: Re: [Dime] Updated DOIC Requirements Analysis X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Jan 2015 15:47:19 -0000 All, I plan to leave the text as is in DOIC-06. We can update it in the next WGLC if needed. Steve On 1/7/15 2:54 PM, Ben Campbell wrote: > (Catching up on older stuff) > > Comments inline. But keep in mind that the detailed requirements are to be removed from the RFC, so I'm not sure we need to spend too much time on them. (Only the first discussion point addresses text that is to remain in the RFC.) > > Thanks! > > Ben. > >> On Dec 12, 2014, at 2:24 AM, Maria Cruz Bartolome wrote: >> >> Hello Ben, >> >> See comments below >> Thanks >> /MCruz >> >>> C.2. Detection of non-supporting Intermediaries >>> >>> The DOIC mechanism as currently defined does not allow supporting >>> nodes to automatically determine whether OC-Supported-Features or OC- >>> OLR AVPs are originated by a peer node, or by a non-peer node and >>> sent across a non-supporting peer. This makes it impossible to >>> detect the presence of non-supporting nodes between supporting nodes, >>> except by configuration. The working group determined that such a >>> configuration requirement is acceptable. >>> >>> This limits full compliance with certain requirements related to the >>> limitation of new configuration, deployment in environments with >>> mixed support, operating across non-supporting agents, and >>> authorization. >>> [MCruz] I think this paragraph should state what are the limitations >>> (generally, like you did for rest of them) Morever, since detailed descriptions will be deleted. >>> >> The limitations are discussed in the security consideration section. Basically if a node expects an agent to enforce any DOIC related policy (e.g. making sure DOIC avps do not leak to unauthorized nodes), it has to know that the agent itself supports DOIC. Right now it can only know that by having an administrator tell it that (violating the limitation on new configuration), by knowing that all agents in the network support DOIC (violating the mixed support and non-supporting agent requirements.) >> [MCruz] Please, include text accordingly then. The text now "certain requirements related to" does not provide an information that anyone could trace easily. > I was explicitly asked by other people (e.g. Lionel) to list the impacted requirements descriptively, rather than by reference, in this section. The "certain requirements related to" are described by the words immediately after that phrase. That is, the requirement to limit new configuration, the requirement to allow deployments with mixed support, and the requirements to authorize who can send and receive overload information. > >>> >>> >>> REQ 6: The solution designers SHOULD seek to minimize the amount of >>> new configuration required in order to work. For example, it >>> is better to allow peers to advertise or negotiate support >>> for the solution, rather than to require that this knowledge >>> to be configured at each node. >>> >>> *Partially Compliant*. Most DOIC parameters are advertised >>> using the DOIC capability announcement mechanism. However, >>> there are some situations where configuration is required. >>> For example, a DOIC node detect the fact that a peer may not >>> support DOIC when nodes on the other side of the non- >>> supporting node do support DOIC without configuration. >>> >>> [MCruz] Could you clarify last example? “withoug configuration� I do not understand what you meant. >> Here's an example: >> >> C ------ A ------ S >> >> If both C and S support DOIC, there is no way for them to tell whether A supports DOIC. Consider two cases: >> >> 1) A supports DOIC. But since C already inserts OC-S-F in all requests, and S inserts it in all answers, A passes them through unchanged. >> 2) A does not support DOIC, but passes through unknown AVPs. Since OC-S-F will be unknown to it, it passes it through unchanged. >> >> From the perspective of C and S, the requests and answers look identical for both cases. Even if A actually changes the content of an OC-S-F avp, neither endpoint can tell if the resulting AVP came from A or the opposite endpoint. >> >> Personally, I think this is a showstopper. But the working group consensus did not agree. >> >> [MCruz] Several comments: >> a) Then you consider this requirement as "partly compliant" since you consider configuration is required in a node to identify whether or not its adjacent peers support DOIC, right? If so, could you explain why a node needs to know whether or not the peer support DOIC, a part from what is included in the advertisement mechanism we defined? > If you do not know that a peer supports DOIC, you cannot assume that it will enforce DOIC related policies (I believe that is sufficiently described in the security configurations.) > >> b) What do you think is a "show stopper"? The need for configuration? > Explicitly, the need to configure whether you can trust a peer to enforce DOIC related polices. I believe this is an important security issue, and that being unable to determine it automatically is a real problem. Requiring this sort of configuration doesn't scale well, and has the potential of creating real management and operations problems. (Note the IETF area that DIME is in.) > > But, as I said, the working group seems to have chosen to move forward without an automatic way to do this. Perhaps it can be improved in a future extension. > >> >> >>> REQ 23: The solution MUST provide sufficient information to enable a >>> load-balancing node to divert messages that are rejected or >>> otherwise throttled by an overloaded upstream node to other >>> upstream nodes that are the most likely to have sufficient >>> capacity to process them. >>> >>> *Not Compliant*. DOIC provides no built in mechanism to >>> determine the best place to divert messages that would >>> otherwise be throttled. This can be accomplished with a >>> future "load" extension, or with proprietary load balancing >>> mechanisms. >>> >>> [MCruz] Partly Compliant. DOIC Overload information can be used already by proprietary load-balancing implementations. >>> >>> Load information will be a plus to this. >>> >> I disagree, or at least think that would be _very_ partial. You won't have any overload information unless the potential diversion targets are also overloaded. >> [MCruz] In case servers in the pools are DOIC enabled the Overload information is provided by all of them, under overload occurrences, then this information is valid (maybe not sufficient in all cases, I agree, but valid in most of them) to divert. >> In case we have mixed servers (DOIC-supporting and non-DOIC) we have some limitations as well. > The purpose behind this requirement was to allow load balancing of requests that are diverted to (hopefully) non-overloaded servers, in a way that reduces the chance of causing those servers to also become overloaded. Those servers will not be providing OLRs. > > I still do not agree that the corner case of diverting request to _overloaded_ servers is big enough to consider this partially compliant. > >> >>> >>> REQ 30: The solution MUST NOT interfere with any Diameter-compliant >>> method that a node may use to protect itself from overload >>> from non-supporting nodes or from denial-of-service attacks. >>> >>> *Compliant*. The specification recommends that any such >>> protection mechanism needed without DOIC should continue to >>> be employed with DOIC. >>> [MCruz] Could you point our where in the draft it is described? >> 9.3 >> [MCruz] I do not think 9.3 says what you mentioned here. >> It says "In the absence of an overload control mechanism...". It is not said the DOIC shall not interfere with any other Diameter method for protection, we may need to add this information to the draft in fact. >> A part from that, I think 9.3. should say "for non-DOIC supporting nodes/networks..." not just "in the absence of _an_ overload control mechanism"... > The "absence of an OC strategy" part is there to provide the context that these protection mechanisms existed, or needed to exist, prior to the availability of DOIC. The section goes on to say that, even with DOIC, these protections are still needed to deal with non-compliant nodes. > > Are you arguing that we don't comply with Req 30? (Keeping in mind that this text is to be removed from the RFC.) > >> >> >> >> >> /Ben. >> >> _______________________________________________ >> DiME mailing list >> DiME@ietf.org >> https://www.ietf.org/mailman/listinfo/dime > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime From nobody Thu Jan 8 09:35:28 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1B0D61A8F40 for ; Thu, 8 Jan 2015 09:35:25 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.31 X-Spam-Level: X-Spam-Status: No, score=-6.31 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, J_CHICKENPOX_47=0.6, RCVD_IN_DNSWL_HI=-5, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with 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+0100 From: "TROTTIN, JEAN-JACQUES (JEAN-JACQUES)" To: Steve Donovan , "dime@ietf.org" Thread-Topic: [Dime] Updated DOIC Requirements Analysis Thread-Index: AQHQCFYt6tScBxBsq0iC3L6bres0LpyIv54AgADMHwCAAihrkIAposKAgAE8XwCAACwScA== Date: Thu, 8 Jan 2015 17:35:18 +0000 Message-ID: References: <46C8B155-A8B0-41F6-A8A5-6F21D61ADE9E@nostrum.com> <087A34937E64E74E848732CFF8354B920987F783@ESESSMB101.ericsson.se> <767BF9E5-A72B-44B5-A324-A0CF74F70A69@nostrum.com> <087A34937E64E74E848732CFF8354B92098808EC@ESESSMB101.ericsson.se> <08B99F05-1FF9-45D8-8979-879FACA25C53@nostrum.com> <54AEA67E.5090601@usdonovans.com> In-Reply-To: <54AEA67E.5090601@usdonovans.com> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [135.239.27.41] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Subject: Re: [Dime] Updated DOIC Requirements Analysis X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Jan 2015 17:35:25 -0000 SGkgDQoNCkRPSUMtdjA2IGN1cnJlbnRseSBjb250YWlucyAgdGhlIGFuYWx5c2lzIG9uIHRoZSBk ZXRhaWxlZCAgbGlzdCBvZiByZXF1aXJlbWVudHMgaW4gYW5uZXggQzYuDQpUbyBjb21lIGJhY2sg b24gQmVuJ3MgcmVtYXJrLCBJIHVuZGVyc3Rvb2QgdGhhdCBkZWNpc2lvbiB3YXMgdGFrZW4gdG8g cmVtb3ZlIGl0LiBDYW5ub3QgaXQgYmUgbm93ICBkb25lIGluIHRoZSBET0lDIFYwNiAod2hpY2gg aXMgbm90IHlldCBwdWJsaXNoZWQgb24gdGhlIElFVEYpLiBPciBpcyBpdCBuZWVkZWQgdG8gd2Fp dCBmb3IgdGhlIG5leHQgV0dMQyhiZWNhdXNlIGxhY2tpbmcgdGltZT8pLg0KDQpCZXN0IHJlZ2Fy ZHMNCg0KSkphY3F1ZXMgIA0KDQpSZWdhcmRzDQoNCkpKYWNxdWVzIA0KDQotLS0tLU1lc3NhZ2Ug ZCdvcmlnaW5lLS0tLS0NCkRlwqA6IERpTUUgW21haWx0bzpkaW1lLWJvdW5jZXNAaWV0Zi5vcmdd IERlIGxhIHBhcnQgZGUgU3RldmUgRG9ub3Zhbg0KRW52b3nDqcKgOiBqZXVkaSA4IGphbnZpZXIg MjAxNSAxNjo0Nw0Kw4DCoDogZGltZUBpZXRmLm9yZw0KT2JqZXTCoDogUmU6IFtEaW1lXSBVcGRh 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X19fX19fX19fX19fX19fX19fX18NCj4+IERpTUUgbWFpbGluZyBsaXN0DQo+PiBEaU1FQGlldGYu b3JnDQo+PiBodHRwczovL3d3dy5pZXRmLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RpbWUNCj4gX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18NCj4gRGlNRSBtYWls aW5nIGxpc3QNCj4gRGlNRUBpZXRmLm9yZw0KPiBodHRwczovL3d3dy5pZXRmLm9yZy9tYWlsbWFu L2xpc3RpbmZvL2RpbWUNCg0KX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX18NCkRpTUUgbWFpbGluZyBsaXN0DQpEaU1FQGlldGYub3JnDQpodHRwczovL3d3dy5p ZXRmLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RpbWUNCg== From nobody Thu Jan 8 12:00:44 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 858031A8AAC for ; Thu, 8 Jan 2015 07:57:27 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.11 X-Spam-Level: X-Spam-Status: No, score=-1.11 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, SPF_NEUTRAL=0.779, T_HTML_ATTACH=0.01] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id gQjTsc45tPTT for ; Thu, 8 Jan 2015 07:57:20 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 81C201A8ABC for ; Thu, 8 Jan 2015 07:57:20 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:63838 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1Y9FSY-0008tM-3Y for dime@ietf.org; Thu, 08 Jan 2015 07:57:19 -0800 Message-ID: <54AEA8DE.4080006@usdonovans.com> Date: Thu, 08 Jan 2015 09:57:18 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: "dime@ietf.org" Content-Type: multipart/mixed; boundary="------------000305010604010803070402" X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - biz131.inmotionhosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - usdonovans.com X-Get-Message-Sender-Via: biz131.inmotionhosting.com: authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: X-Mailman-Approved-At: Thu, 08 Jan 2015 12:00:41 -0800 Subject: [Dime] DOIC-06 X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Jan 2015 15:57:28 -0000 This is a multi-part message in MIME format. --------------000305010604010803070402 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit All, I have updated github with the latest DOIC-06 version. I plan to submit this version later today. I would expect that, given the scope of the changes made in the WGLC, we will require a second WGLC, hopefully a short one. I've attached the diff from the last version of DOIC-06. I'll send a diff from DOIC-05 after I submit the draft. 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Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CCCE01A8A9A; Fri, 9 Jan 2015 06:33:58 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.9 X-Spam-Level: X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id d3Tn3rpIshbs; Fri, 9 Jan 2015 06:33:54 -0800 (PST) Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 3FC421A1B63; Fri, 9 Jan 2015 06:33:54 -0800 (PST) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: i-d-announce@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 5.10.0.p8 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <20150109143354.10495.9011.idtracker@ietfa.amsl.com> Date: Fri, 09 Jan 2015 06:33:54 -0800 Archived-At: Cc: dime@ietf.org Subject: [Dime] I-D Action: draft-ietf-dime-ovli-06.txt X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Jan 2015 14:33:59 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Diameter Maintenance and Extensions Working Group of the IETF. Title : Diameter Overload Indication Conveyance Authors : Jouni Korhonen Steve Donovan Ben Campbell Lionel Morand Filename : draft-ietf-dime-ovli-06.txt Pages : 51 Date : 2015-01-09 Abstract: This specification defines a base solution for Diameter overload control, referred to as Diameter Overload Indication Conveyance (DOIC). The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-dime-ovli/ There's also a htmlized version available at: http://tools.ietf.org/html/draft-ietf-dime-ovli-06 A diff from the previous version is available at: http://www.ietf.org/rfcdiff?url2=draft-ietf-dime-ovli-06 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Fri Jan 9 06:34:08 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DA2021A8A9A for ; Fri, 9 Jan 2015 06:34:00 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.9 X-Spam-Level: X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FXLIV3xGAbtF; Fri, 9 Jan 2015 06:33:58 -0800 (PST) Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 7BAC11A8972; Fri, 9 Jan 2015 06:33:55 -0800 (PST) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: draft-ietf-dime-ovli.all@tools.ietf.org, dime@ietf.org, dime-chairs@tools.ietf.org, aland@deployingradius.com X-Test-IDTracker: no X-IETF-IDTracker: 5.10.0.p8 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <20150109143355.10495.13376.idtracker@ietfa.amsl.com> Date: Fri, 09 Jan 2015 06:33:55 -0800 Archived-At: Subject: [Dime] New Version Notification - draft-ietf-dime-ovli-06.txt X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Jan 2015 14:34:01 -0000 A new version (-06) has been submitted for draft-ietf-dime-ovli: http://www.ietf.org/internet-drafts/draft-ietf-dime-ovli-06.txt The IETF datatracker page for this Internet-Draft is: https://datatracker.ietf.org/doc/draft-ietf-dime-ovli/ Diff from previous version: http://www.ietf.org/rfcdiff?url2=draft-ietf-dime-ovli-06 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. IETF Secretariat. From nobody Fri Jan 9 09:50:14 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E93141A87BB for ; Fri, 9 Jan 2015 09:50:07 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.279 X-Spam-Level: X-Spam-Status: No, score=0.279 tagged_above=-999 required=5 tests=[BAYES_05=-0.5, SPF_NEUTRAL=0.779] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id XYEivLKsuv_O for ; Fri, 9 Jan 2015 09:50:06 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D51EC1A875D for ; Fri, 9 Jan 2015 09:50:06 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:65048 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1Y9dh6-0007Wc-CT for dime@ietf.org; Fri, 09 Jan 2015 09:50:01 -0800 Message-ID: <54B014C4.2090300@usdonovans.com> Date: Fri, 09 Jan 2015 11:49:56 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: "dime@ietf.org" Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-OutGoing-Spam-Status: No, score=-0.6 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - biz131.inmotionhosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - usdonovans.com X-Get-Message-Sender-Via: biz131.inmotionhosting.com: authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: Subject: [Dime] DOIC-06 X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Jan 2015 17:50:13 -0000 All, As you can see, I submitted DOIC-06. You can find a link to the diffs file here: http://datatracker.ietf.org/doc/draft-ietf-dime-ovli/history/ Regards, Steve From nobody Fri Jan 9 23:30:05 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B1FF81A8A91 for ; Fri, 9 Jan 2015 23:30:03 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.31 X-Spam-Level: X-Spam-Status: No, score=-1.31 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, J_CHICKENPOX_47=0.6, T_RP_MATCHES_RCVD=-0.01] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id hcYd-lTruItr for ; Fri, 9 Jan 2015 23:30:01 -0800 (PST) Received: from nostrum.com (raven-v6.nostrum.com [IPv6:2001:470:d:1130::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0A34A1A8875 for ; Fri, 9 Jan 2015 23:30:00 -0800 (PST) Received: from [10.0.1.23] (cpe-173-172-146-58.tx.res.rr.com [173.172.146.58]) (authenticated bits=0) by nostrum.com (8.14.9/8.14.7) with ESMTP id t0A7Tvfd042588 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 10 Jan 2015 01:29:58 -0600 (CST) (envelope-from ben@nostrum.com) X-Authentication-Warning: raven.nostrum.com: Host cpe-173-172-146-58.tx.res.rr.com [173.172.146.58] claimed to be [10.0.1.23] Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) From: Ben Campbell In-Reply-To: Date: Sat, 10 Jan 2015 01:29:56 -0600 X-Mao-Original-Outgoing-Id: 442567796.711116-a278deec7c519fb66269dec45906f858 Content-Transfer-Encoding: quoted-printable Message-Id: References: <46C8B155-A8B0-41F6-A8A5-6F21D61ADE9E@nostrum.com> <087A34937E64E74E848732CFF8354B920987F783@ESESSMB101.ericsson.se> <767BF9E5-A72B-44B5-A324-A0CF74F70A69@nostrum.com> <087A34937E64E74E848732CFF8354B92098808EC@ESESSMB101.ericsson.se> <08B99F05-1FF9-45D8-8979-879FACA25C53@nostrum.com> <54AEA67E.5090601@usdonovans.com> To: "TROTTIN, JEAN-JACQUES (JEAN-JACQUES)" X-Mailer: Apple Mail (2.1993) Archived-At: Cc: "dime@ietf.org" Subject: Re: [Dime] Updated DOIC Requirements Analysis X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 10 Jan 2015 07:30:03 -0000 The section is marked for removal by the RFC editor prior to final = publication. Thanks! Ben. > On Jan 8, 2015, at 11:35 AM, TROTTIN, JEAN-JACQUES (JEAN-JACQUES) = wrote: >=20 > Hi=20 >=20 > DOIC-v06 currently contains the analysis on the detailed list of = requirements in annex C6. > To come back on Ben's remark, I understood that decision was taken to = remove it. Cannot it be now done in the DOIC V06 (which is not yet = published on the IETF). Or is it needed to wait for the next = WGLC(because lacking time?). >=20 > Best regards >=20 > JJacques =20 >=20 > Regards >=20 > JJacques=20 >=20 > -----Message d'origine----- > De : DiME [mailto:dime-bounces@ietf.org] De la part de Steve Donovan > Envoy=C3=A9 : jeudi 8 janvier 2015 16:47 > =C3=80 : dime@ietf.org > Objet : Re: [Dime] Updated DOIC Requirements Analysis >=20 > All, >=20 > I plan to leave the text as is in DOIC-06. We can update it in the = next WGLC if needed. >=20 > Steve >=20 > On 1/7/15 2:54 PM, Ben Campbell wrote: >> (Catching up on older stuff) >>=20 >> Comments inline. But keep in mind that the detailed requirements are=20= >> to be removed from the RFC, so I'm not sure we need to spend too much=20= >> time on them. (Only the first discussion point addresses text that is=20= >> to remain in the RFC.) >>=20 >> Thanks! >>=20 >> Ben. >>=20 >>> On Dec 12, 2014, at 2:24 AM, Maria Cruz Bartolome = wrote: >>>=20 >>> Hello Ben, >>>=20 >>> See comments below >>> Thanks >>> /MCruz >>>=20 >>>> C.2. Detection of non-supporting Intermediaries >>>>=20 >>>> The DOIC mechanism as currently defined does not allow supporting >>>> nodes to automatically determine whether OC-Supported-Features or = OC- >>>> OLR AVPs are originated by a peer node, or by a non-peer node and >>>> sent across a non-supporting peer. This makes it impossible to >>>> detect the presence of non-supporting nodes between supporting = nodes, >>>> except by configuration. The working group determined that such = a >>>> configuration requirement is acceptable. >>>>=20 >>>> This limits full compliance with certain requirements related to = the >>>> limitation of new configuration, deployment in environments with >>>> mixed support, operating across non-supporting agents, and >>>> authorization. >>>> [MCruz] I think this paragraph should state what are the = limitations=20 >>>> (generally, like you did for rest of them) Morever, since detailed = descriptions will be deleted. >>>>=20 >>> The limitations are discussed in the security consideration section.=20= >>> Basically if a node expects an agent to enforce any DOIC related = policy (e.g. making sure DOIC avps do not leak to unauthorized nodes), = it has to know that the agent itself supports DOIC. Right now it can = only know that by having an administrator tell it that (violating the = limitation on new configuration), by knowing that all agents in the = network support DOIC (violating the mixed support and non-supporting = agent requirements.) [MCruz] Please, include text accordingly then. The = text now "certain requirements related to" does not provide an = information that anyone could trace easily. >> I was explicitly asked by other people (e.g. Lionel) to list the = impacted requirements descriptively, rather than by reference, in this = section. The "certain requirements related to" are described by the = words immediately after that phrase. That is, the requirement to limit = new configuration, the requirement to allow deployments with mixed = support, and the requirements to authorize who can send and receive = overload information. >>=20 >>>>=20 >>>>=20 >>>> REQ 6: The solution designers SHOULD seek to minimize the amount = of >>>> new configuration required in order to work. For = example, it >>>> is better to allow peers to advertise or negotiate = support >>>> for the solution, rather than to require that this = knowledge >>>> to be configured at each node. >>>>=20 >>>> *Partially Compliant*. Most DOIC parameters are = advertised >>>> using the DOIC capability announcement mechanism. = However, >>>> there are some situations where configuration is = required. >>>> For example, a DOIC node detect the fact that a peer may = not >>>> support DOIC when nodes on the other side of the non- >>>> supporting node do support DOIC without configuration. >>>>=20 >>>> [MCruz] Could you clarify last example? =E2=80=9Cwithoug = configuration=E2=80=9D? I do not understand what you meant. >>> Here's an example: >>>=20 >>> C ------ A ------ S >>>=20 >>> If both C and S support DOIC, there is no way for them to tell = whether A supports DOIC. Consider two cases: >>>=20 >>> 1) A supports DOIC. But since C already inserts OC-S-F in all = requests, and S inserts it in all answers, A passes them through = unchanged. >>> 2) A does not support DOIC, but passes through unknown AVPs. Since = OC-S-F will be unknown to it, it passes it through unchanged. >>>=20 >>> =46rom the perspective of C and S, the requests and answers look = identical for both cases. Even if A actually changes the content of an = OC-S-F avp, neither endpoint can tell if the resulting AVP came from A = or the opposite endpoint. >>>=20 >>> Personally, I think this is a showstopper. But the working group = consensus did not agree. >>>=20 >>> [MCruz] Several comments: >>> a) Then you consider this requirement as "partly compliant" since = you consider configuration is required in a node to identify whether or = not its adjacent peers support DOIC, right? If so, could you explain why = a node needs to know whether or not the peer support DOIC, a part from = what is included in the advertisement mechanism we defined? >> If you do not know that a peer supports DOIC, you cannot assume that=20= >> it will enforce DOIC related policies (I believe that is sufficiently=20= >> described in the security configurations.) >>=20 >>> b) What do you think is a "show stopper"? The need for = configuration? >> Explicitly, the need to configure whether you can trust a peer to=20 >> enforce DOIC related polices. I believe this is an important security=20= >> issue, and that being unable to determine it automatically is a real=20= >> problem. Requiring this sort of configuration doesn't scale well, and=20= >> has the potential of creating real management and operations = problems.=20 >> (Note the IETF area that DIME is in.) >>=20 >> But, as I said, the working group seems to have chosen to move = forward without an automatic way to do this. Perhaps it can be improved = in a future extension. >>=20 >>>=20 >>>=20 >>>> REQ 23: The solution MUST provide sufficient information to = enable a >>>> load-balancing node to divert messages that are rejected = or >>>> otherwise throttled by an overloaded upstream node to = other >>>> upstream nodes that are the most likely to have = sufficient >>>> capacity to process them. >>>>=20 >>>> *Not Compliant*. DOIC provides no built in mechanism to >>>> determine the best place to divert messages that would >>>> otherwise be throttled. This can be accomplished with a >>>> future "load" extension, or with proprietary load = balancing >>>> mechanisms. >>>>=20 >>>> [MCruz] Partly Compliant. DOIC Overload information can be used = already by proprietary load-balancing implementations. >>>>=20 >>>> Load information will be a plus to this. >>>>=20 >>> I disagree, or at least think that would be _very_ partial. You = won't have any overload information unless the potential diversion = targets are also overloaded. >>> [MCruz] In case servers in the pools are DOIC enabled the Overload = information is provided by all of them, under overload occurrences, then = this information is valid (maybe not sufficient in all cases, I agree, = but valid in most of them) to divert. >>> In case we have mixed servers (DOIC-supporting and non-DOIC) we have = some limitations as well. >> The purpose behind this requirement was to allow load balancing of = requests that are diverted to (hopefully) non-overloaded servers, in a = way that reduces the chance of causing those servers to also become = overloaded. Those servers will not be providing OLRs. >>=20 >> I still do not agree that the corner case of diverting request to = _overloaded_ servers is big enough to consider this partially compliant. >>=20 >>>=20 >>>>=20 >>>> REQ 30: The solution MUST NOT interfere with any = Diameter-compliant >>>> method that a node may use to protect itself from = overload >>>> from non-supporting nodes or from denial-of-service = attacks. >>>>=20 >>>> *Compliant*. The specification recommends that any such >>>> protection mechanism needed without DOIC should continue = to >>>> be employed with DOIC. >>>> [MCruz] Could you point our where in the draft it is described? >>> 9.3 >>> [MCruz] I do not think 9.3 says what you mentioned here. >>> It says "In the absence of an overload control mechanism...". It is = not said the DOIC shall not interfere with any other Diameter method for = protection, we may need to add this information to the draft in fact. >>> A part from that, I think 9.3. should say "for non-DOIC supporting = nodes/networks..." not just "in the absence of _an_ overload control = mechanism"... >> The "absence of an OC strategy" part is there to provide the context = that these protection mechanisms existed, or needed to exist, prior to = the availability of DOIC. The section goes on to say that, even with = DOIC, these protections are still needed to deal with non-compliant = nodes. >>=20 >> Are you arguing that we don't comply with Req 30? (Keeping in mind=20 >> that this text is to be removed from the RFC.) >>=20 >>>=20 >>>=20 >>>=20 >>>=20 >>> /Ben. >>>=20 >>> _______________________________________________ >>> DiME mailing list >>> DiME@ietf.org >>> https://www.ietf.org/mailman/listinfo/dime >> _______________________________________________ >> DiME mailing list >> DiME@ietf.org >> https://www.ietf.org/mailman/listinfo/dime >=20 > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime From nobody Tue Jan 13 05:17:32 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AEAE91A8AD0 for ; Tue, 13 Jan 2015 05:17:29 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.91 X-Spam-Level: X-Spam-Status: No, score=-1.91 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id uyIFBZibMEFm for ; Tue, 13 Jan 2015 05:17:27 -0800 (PST) Received: from zinfandel.tools.ietf.org (zinfandel.tools.ietf.org [IPv6:2001:1890:123a::1:2a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E86DE1A8AC6 for ; Tue, 13 Jan 2015 05:17:27 -0800 (PST) Received: from localhost ([::1]:42986 helo=zinfandel.tools.ietf.org) by zinfandel.tools.ietf.org with esmtp (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1YB1Lb-0003Ko-Eb; Tue, 13 Jan 2015 05:17:27 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: "dime issue tracker" X-Trac-Version: 0.12.3 Precedence: bulk Auto-Submitted: auto-generated X-Mailer: Trac 0.12.3, by Edgewall Software To: jouni.nospam@gmail.com X-Trac-Project: dime Date: Tue, 13 Jan 2015 13:17:27 -0000 X-URL: http://tools.ietf.org/wg/dime/ X-Trac-Ticket-URL: https://tools.ietf.org/wg/dime/trac/ticket/88#comment:1 Message-ID: <079.f7e3cff0405a27773a314ec569297559@trac.tools.ietf.org> References: <064.69cb533e2dbb732d0731c1452d36605e@trac.tools.ietf.org> X-Trac-Ticket-ID: 88 In-Reply-To: <064.69cb533e2dbb732d0731c1452d36605e@trac.tools.ietf.org> X-SA-Exim-Connect-IP: ::1 X-SA-Exim-Rcpt-To: jouni.nospam@gmail.com, dime@ietf.org X-SA-Exim-Mail-From: trac+dime@trac.tools.ietf.org X-SA-Exim-Scanned: No (on zinfandel.tools.ietf.org); SAEximRunCond expanded to false Archived-At: Cc: dime@ietf.org Subject: Re: [Dime] [dime] #88 (draft-ietf-dime-ovli): Editorials X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Reply-To: dime@ietf.org List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Jan 2015 13:17:29 -0000 #88: Editorials Changes (by jouni.nospam@gmail.com): * status: new => closed * resolution: => fixed Comment: -06 fixed the editorial. -- ------------------------------------+------------------------------------- Reporter: jouni.nospam@gmail.com | Owner: jouni.nospam@gmail.com Type: defect | Status: closed Priority: trivial | Milestone: Component: draft-ietf-dime-ovli | Version: Severity: In WG Last Call | Resolution: fixed Keywords: | ------------------------------------+------------------------------------- Ticket URL: dime From nobody Tue Jan 13 07:28:38 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9003E1A1EF2 for ; Tue, 13 Jan 2015 07:28:35 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.23 X-Spam-Level: X-Spam-Status: No, score=-1.23 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_SORBS_WEB=0.77, SPF_PASS=-0.001] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id N6T0-cZTBtZf for ; Tue, 13 Jan 2015 07:28:34 -0800 (PST) Received: from mail-qg0-x230.google.com (mail-qg0-x230.google.com [IPv6:2607:f8b0:400d:c04::230]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 77A771A1B80 for ; Tue, 13 Jan 2015 07:28:34 -0800 (PST) Received: by mail-qg0-f48.google.com with SMTP id j5so2603584qga.7 for ; Tue, 13 Jan 2015 07:28:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject :content-type:content-transfer-encoding; bh=57tP9V9Eo6kW9Ut2KXkyf7r2Y6KXJ9e4WR6Y8O3xgtQ=; b=cE2oooiXnesXydSkONY/KbEZCtd0Gkp1lu//mTYbaLGU9tIh6bPCs5C0Zun4+29NtZ 7HqzohrSFfLKgcW02fY77VrLLVcZxPh6SOdrLNBJj0QGgLcO8TYJS6g5m0bDgD9d0ffa oQ156nguXFkb8OhhjjE03m8WGDoR96LNwFTHjYMAJf+sAhIOseALUno0f0X28vpNGIJ1 kZ4+1sxSyLxgPoubFVoRHOXMQ3V66mWbFWW3pzOhbgVRLAEnwSTMkx4bkHCauiOe1bB1 OhGG62F3OkHswvONFvwsLalOoYZa0etE02UTBToFQ9oLLFM1wkZ+T9QTZ1XqVtwyi2Bg 7fHA== X-Received: by 10.140.98.168 with SMTP id o37mr57180698qge.39.1421162913676; Tue, 13 Jan 2015 07:28:33 -0800 (PST) Received: from [10.2.5.195] ([63.133.138.10]) by mx.google.com with ESMTPSA id r7sm1370830qat.22.2015.01.13.07.28.32 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 13 Jan 2015 07:28:32 -0800 (PST) Message-ID: <54B5399D.3020600@gmail.com> Date: Tue, 13 Jan 2015 07:28:29 -0800 From: Jouni Korhonen User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: "dime@ietf.org" , draft-ietf-dime-ovli@tools.ietf.org Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Archived-At: Subject: [Dime] WLGC #2 for draft-ietf-dime-ovli-06 X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Jan 2015 15:28:35 -0000 Folks, Thanks for the hard work on the -06 revision. Since the changes from -05 to -06 were many, chairs decided to run another short WGLC for the WG to verify all changes and discussions are implemented correctly. This email starts a one week WGLC #2 for draft-ietf-dime-ovli-06. The WGLC ends 20th Jan 2015 EOB (PST). Post your review comments and concerns to the mailinglist. Also make use of the issue tracker (remember to select "severity" as "in WG last call"). Lionel & Jouni From nobody Tue Jan 13 08:18:14 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DD5881A8F43 for ; Tue, 13 Jan 2015 08:18:12 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.598 X-Spam-Level: X-Spam-Status: No, score=-2.598 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id V4JwN_yvLSLH for ; Tue, 13 Jan 2015 08:18:10 -0800 (PST) Received: from relais-inet.francetelecom.com (relais-ias91.francetelecom.com [193.251.215.91]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 466321A8BBD for ; Tue, 13 Jan 2015 08:18:06 -0800 (PST) Received: from omfedm08.si.francetelecom.fr (unknown [xx.xx.xx.4]) by omfedm12.si.francetelecom.fr (ESMTP service) with ESMTP id D09BB18C6C1; Tue, 13 Jan 2015 17:18:04 +0100 (CET) Received: from Exchangemail-eme1.itn.ftgroup (unknown [10.114.1.186]) by omfedm08.si.francetelecom.fr (ESMTP service) with ESMTP id B0C2D238075; Tue, 13 Jan 2015 17:18:04 +0100 (CET) Received: from PEXCVZYM13.corporate.adroot.infra.ftgroup ([fe80::cc7e:e40b:42ef:164e]) by PEXCVZYH01.corporate.adroot.infra.ftgroup ([::1]) with mapi id 14.03.0224.002; Tue, 13 Jan 2015 17:18:04 +0100 From: To: "dime@ietf.org" Thread-Topic: Call for WG adoption: draft-zhou-dime-4over6-provisioning Thread-Index: AdAvS9l1tdi+TFbqRGW1EQiL3sUgVg== Date: Tue, 13 Jan 2015 16:18:03 +0000 Message-ID: <8849_1421165884_54B5453C_8849_19891_1_6B7134B31289DC4FAF731D844122B36EB00A1D@PEXCVZYM13.corporate.adroot.infra.ftgroup> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [10.197.38.6] Content-Type: multipart/related; boundary="_004_6B7134B31289DC4FAF731D844122B36EB00A1DPEXCVZYM13corpora_"; type="multipart/alternative" MIME-Version: 1.0 X-PMX-Version: 6.0.3.2322014, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2014.12.22.190922 Archived-At: Cc: "dime-chairs@tools.ietf.org" Subject: [Dime] Call for WG adoption: draft-zhou-dime-4over6-provisioning X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Jan 2015 16:18:13 -0000 --_004_6B7134B31289DC4FAF731D844122B36EB00A1DPEXCVZYM13corpora_ Content-Type: multipart/alternative; boundary="_000_6B7134B31289DC4FAF731D844122B36EB00A1DPEXCVZYM13corpora_" --_000_6B7134B31289DC4FAF731D844122B36EB00A1DPEXCVZYM13corpora_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Folks, As we discussed and agreed during the last IETF meeting, we ask for the WG = adoption for draft-zhou-dime-4over6-provisioning, which was considered as s= table enough to become a WG document and almost ready for a WGLC. This mail officially starts a two week adoption call for draft-zhou-dime-4o= ver6-provisioning as a WG Item. Express your support or disagreement on the mailing list. The call will end= on January, 27th EOB (CET). - Jouni & Lionel ________________________________ [http://www.orange.com/sirius/logos_mail/orange_logo.gif] Lionel Morand Orange/IMT/OLN/CNC/NCA/A2M Senior Architect IMS/4G core network and Diameter expert t=E9l. +33 1 45 29 62 57 mob. +33 6 07 75 89 36 lionel.morand@orange.com ___________________________________________________________________________= ______________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confiden= tielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu= ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el= ectroniques etant susceptibles d'alteration, Orange decline toute responsabilite si ce message a ete altere, deforme ou = falsifie. Merci. This message and its attachments may contain confidential or privileged inf= ormation that may be protected by law; they should not be distributed, used or copied without authorisation. If you have received this email in error, please notify the sender and dele= te this message and its attachments. As emails may be altered, Orange is not liable for messages that have been = modified, changed or falsified. Thank you. --_000_6B7134B31289DC4FAF731D844122B36EB00A1DPEXCVZYM13corpora_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Folks,

 

As we discussed and agreed d= uring the last IETF meeting, we ask for the WG adoption for draft-zhou-dime= -4over6-provisioning, which was considered as stable enough to become a WG = document and almost ready for a WGLC.

 

This mail officially starts = a two week adoption call for draft-zhou-dime-4over6-provisioning as a WG It= em.

 

Express your support or disa= greement on the mailing list. The call will end on January, 27th= EOB (CET).

 

- Jouni & Lionel

 

 

3D"==

Lion= el Morand
Orange/IMT/OLN/CNC/NCA/A2M
Senior Architect IMS/4G core network and Diameter expert =

t=E9l. +33 1 45 29 62 57
mob. +33 6 07 75 89 36
lionel.morand@orange.com

 

______________________________________________________________________=
___________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.
Thank you.
--_000_6B7134B31289DC4FAF731D844122B36EB00A1DPEXCVZYM13corpora_-- --_004_6B7134B31289DC4FAF731D844122B36EB00A1DPEXCVZYM13corpora_ Content-Type: image/gif; name="image001.gif" Content-Description: image001.gif Content-Disposition: inline; filename="image001.gif"; size=1264; creation-date="Tue, 13 Jan 2015 16:18:03 GMT"; modification-date="Tue, 13 Jan 2015 16:18:03 GMT" Content-ID: Content-Transfer-Encoding: base64 R0lGODlhKAAoAPcAAP9mAP9lAP////9jAP9kAP9gAP9eAP9dAP9iAP9fAP/x5/9cAP9YAP9ZAP/6 9v+3i/9yGf9lBP+ygv/n1/+IQf/Xvf/fyf+kbP+3if/LrP9jAv9oBv+7kP9oCP91Hf/UuP9xF/+/ lv/awP9mB/+JPf+XV/+EPP+KPf/y6f+HQf+HQv9pC/+PRf/s4f/59f9/Mv9kAv9lAv+cXf/IpP/8 +v/8+P+4jf/Stf9VAP/Ttv/Bmf/Lq/9sDv9vEP9sC/+JPv+2hv9xFv+VUP+ALf9zGv+1h//w5v/u 4v9kBf/JqP/Vuv+3h/+KQv+IQv+2h/9kC/+9k//t4v92G//dyf9bAP9vEv+zhf9aAP91JP/07P/D nf/awf+UT/9pCP/dxv/Nrv+pc//p2v9hAP+GPf9pBv+GP/9iA/9iCv+ocv+QSv/Zwv/AmP+8j/+d Xv/Mqv+lbf/Psf+IOv/7+P/Orv9nCP+SU/96Lv96J//j0f9nA/9eBP/bw//aw//k1P+STf/r3f/n 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10:39:56 +0100 From: "Wiehe, Ulrich (NSN - DE/Munich)" To: "Wiehe, Ulrich (NSN - DE/Munich)" , ext Ben Campbell Thread-Topic: [Dime] Ulrich's suggested change #15 Thread-Index: AQHQE7dJhQB5e1nbwEev114RSsJu35yHeSWggAL2Z7uAAD8mAIAACZWAgAY/jwCAAU9ggIABPegggAglTQCAAYF28IAAH80AgAAaZ9CAAAAWgIAAFGEAgAAhJyCAIfS8IA== Date: Wed, 14 Jan 2015 09:39:55 +0000 Message-ID: <5BCBA1FC2B7F0B4C9D935572D90006681523EEF1@DEMUMBX014.nsn-intra.net> References: <5486FE71.70205@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D900066815235215@DEMUMBX014.nsn-intra.net> <54884137.4050209@usdonovans.com> <5AB8BAC5-3CBD-432E-9631-74DF40795844@nostrum.com> <5489A498.5070203@usdonovans.com> <5489EFAF.8010702@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D9000668152358E0@DEMUMBX014.nsn-intra.net> <549046D3.3090104@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D900066815235AB9@DEMUMBX014.nsn-intra.net> <549826C8.1090809@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D900066815239CB6@DEMUMBX014.nsn-intra.net> <1FC86658-AB09-4C11-9ED1-0C7FAFC542BE@nostrum.com> <5BCBA1FC2B7F0B4C9D935572D90006681523ACF5@DEMUMBX014.nsn-intra.net> <5BCBA1FC2B7F0B4C9D935572D90006681523AD21@DEMUMBX014.nsn-intra.net> <5BCBA1FC2B7F0B4C9D935572D90006681523AD55@DEMUMBX014.nsn-intra.net> In-Reply-To: <5BCBA1FC2B7F0B4C9D935572D90006681523AD55@DEMUMBX014.nsn-intra.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.159.42.109] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-purgate-type: clean X-purgate-Ad: Categorized by eleven eXpurgate (R) http://www.eleven.de X-purgate: clean X-purgate: This mail is considered clean (visit http://www.eleven.de for further information) X-purgate-size: 15228 X-purgate-ID: 151667::1421228400-00002DC5-E9885BA0/0/0 Archived-At: Cc: "dime@ietf.org" Subject: Re: [Dime] Ulrich's suggested change #15 X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: 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Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RpbWUNCj4+IA0KPj4gDQo+PiANCj4+IA0KPiANCg0KX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18NCkRpTUUgbWFpbGlu ZyBsaXN0DQpEaU1FQGlldGYub3JnDQpodHRwczovL3d3dy5pZXRmLm9yZy9tYWlsbWFuL2xpc3Rp bmZvL2RpbWUNCg== From nobody Wed Jan 14 02:38:58 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D10B61A8A78 for ; Wed, 14 Jan 2015 02:38:57 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.9 X-Spam-Level: X-Spam-Status: No, score=-6.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3WOPlpPLWRKR for ; Wed, 14 Jan 2015 02:38:51 -0800 (PST) Received: from demumfd002.nsn-inter.net 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id 14.03.0195.001; Wed, 14 Jan 2015 11:38:39 +0100 From: "Wiehe, Ulrich (NSN - DE/Munich)" To: "ext TROTTIN, JEAN-JACQUES (JEAN-JACQUES)" , Ben Campbell Thread-Topic: [Dime] Diameter load control inputs Thread-Index: AdAoRTX1mtXcCV8gROKEYHqQd0nf8gBv2auAAEZezgABMPpVgA== Date: Wed, 14 Jan 2015 10:38:38 +0000 Message-ID: <5BCBA1FC2B7F0B4C9D935572D90006681523EF2A@DEMUMBX014.nsn-intra.net> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.159.42.109] Content-Type: multipart/alternative; boundary="_000_5BCBA1FC2B7F0B4C9D935572D90006681523EF2ADEMUMBX014nsnin_" MIME-Version: 1.0 X-purgate-type: clean X-purgate-Ad: Categorized by eleven eXpurgate (R) http://www.eleven.de X-purgate: clean X-purgate: This mail is considered clean (visit http://www.eleven.de for further information) X-purgate-size: 74330 X-purgate-ID: 151667::1421231925-00001177-AA8CA044/0/0 Archived-At: Cc: "dime@ietf.org" Subject: Re: [Dime] Diameter load control inputs X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Jan 2015 10:38:58 -0000 --_000_5BCBA1FC2B7F0B4C9D935572D90006681523EF2ADEMUMBX014nsnin_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 SGkgSmVhbi1KYWNxdWVzLA0KDQpJIHdvdWxkIGxpa2UgdG8gbGltaXQgRGlhbWV0ZXIgbG9hZCBj b250cm9sIHRvIHNlcnZlciAgKGhvc3QpIGxvYWQgYW5kIHJlYWxtIGxvYWQgaW4gYSBmaXJzdCBz dGVwIGFuZCBsZWF2ZSBhZ2VudCBsb2FkIGZvciBhIHNlY29uZCBzdGVwLg0KV2UgbmVhcmx5IGhh dmUgY29tcGxldGVkIERpYW1ldGVyIE92ZXJsb2FkIGNvbnRyb2wgd2hpY2ggaXMgbGltaXRlZCB0 byBzZXJ2ZXIgKGhvc3QpIG92ZXJsb2FkIGFuZCByZWFsbSBvdmVybG9hZCwgd2hpbGUgdGhlIGFn ZW50IG92ZXJsb2FkIGRyYWZ0ICBpcyBub3QgY29tcGxldGUuDQoNCk9uY2UgQWdlbnQgT3Zlcmxv YWQgY29udHJvbCBpcyBzdGFibGUgd2UgbWF5IGNvbnNpZGVyIGV4dGVuZGluZyBpdCB3aXRoIGFn 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X-Spam-Level: X-Spam-Status: No, score=-14.511 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id jwfTXxbyf4Nm for ; Wed, 14 Jan 2015 03:08:35 -0800 (PST) Received: from aer-iport-2.cisco.com (aer-iport-2.cisco.com [173.38.203.52]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 185A11ACE53 for ; Wed, 14 Jan 2015 03:08:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=2331; q=dns/txt; s=iport; t=1421233715; x=1422443315; h=message-id:date:from:mime-version:to:cc:subject: references:in-reply-to:content-transfer-encoding; bh=+7wSGFMGFkQv1jDxEYYsPd9Id7twwr23SsuuY6whoys=; b=X/BDJgmTwWrPeZC86hsYQgAR0R/b8a14rBKqi8JYuvlYVhJMalNCugn/ MhPBBYA7bnjoJxo6H/uM4iRi9kN68N4g+ReWSYr7d1AwI31sjE/wJZK6R 7gdPa6S5Z6YmsK9EsSGG+JlHTpmMYesm00zPAzGPTlpV1rX3PEWBFGGe+ w=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AicFAF9NtlStJssW/2dsb2JhbABBGoNYWMYFhXECgVgBAQEBAX2EDQEBBDIBBUABEAshFg8JAwIBAgFFBwwBBQIBAYgoDTfPXAEBAQEBAQEBAgEBAQEBAQEBGoxJgkNtB4QpAQSFNpIZgQ+CcoIZi2Iigg+BYD0xARKCMAEBAQ X-IronPort-AV: E=Sophos;i="5.07,755,1413244800"; d="scan'208";a="311389586" Received: from aer-iport-nat.cisco.com (HELO aer-core-3.cisco.com) ([173.38.203.22]) by aer-iport-2.cisco.com with ESMTP; 14 Jan 2015 11:08:32 +0000 Received: from [10.60.67.85] (ams-bclaise-8914.cisco.com [10.60.67.85]) by aer-core-3.cisco.com (8.14.5/8.14.5) with ESMTP id t0EB8Vk8014041; Wed, 14 Jan 2015 11:08:31 GMT Message-ID: <54B64E2E.1080908@cisco.com> Date: Wed, 14 Jan 2015 12:08:30 +0100 From: Benoit Claise User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.7.0 MIME-Version: 1.0 To: vf0213@gmail.com, jari.arkko@ericsson.com, john.loughney@nokia.com, glenzorn@gmail.com, joelja@bogus.com, jouni.nospam@gmail.com, lionel.morand@orange.com References: <20141226060357.493B018008C@rfc-editor.org> In-Reply-To: <20141226060357.493B018008C@rfc-editor.org> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Archived-At: Cc: dime@ietf.org, Hans.Liu@alcatel-lucent.com Subject: Re: [Dime] [Technical Errata Reported] RFC6733 (4209) X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Jan 2015 11:08:38 -0000 Document authors, DIME participants, Can we please have a discussion on this errata validity. Regards, Benoit > The following errata report has been submitted for RFC6733, > "Diameter Base Protocol". > > -------------------------------------- > You may review the report below and at: > http://www.rfc-editor.org/errata_search.php?rfc=6733&eid=4209 > > -------------------------------------- > Type: Technical > Reported by: Hans Liu > > Section: 5.4.3 > > Original Text > ------------- > BUSY 1 > The peer’s internal resources are constrained, and it has > determined that the transport connection needs to be closed. > A receiver of a DPR with above result code SHOULD NOT attempt > reconnection. > > Corrected Text > -------------- > BUSY 1 > The peer’s internal resources are constrained, and it has > determined that the transport connection needs to be closed. > A receiver of a DPR with above result code SHOULD either > connect to an alternate node, or attempt reconnection > after a time period. > > Notes > ----- > In most implementations, the Diameter node will continue to serve its peer after the resources recover and expect reconnection. If the Diameter node won't like reconnection from peer, DO_NOT_WANT_TO_TALK_TO_YOU can be used instead of BUSY. > > Instructions: > ------------- > This erratum is currently posted as "Reported". If necessary, please > use "Reply All" to discuss whether it should be verified or > rejected. When a decision is reached, the verifying party (IESG) > can log in to change the status and edit the report, if necessary. > > -------------------------------------- > RFC6733 (draft-ietf-dime-rfc3588bis-33) > -------------------------------------- > Title : Diameter Base Protocol > Publication Date : October 2012 > Author(s) : V. Fajardo, Ed., J. Arkko, J. Loughney, G. Zorn, Ed. > Category : PROPOSED STANDARD > Source : Diameter Maintenance and Extensions > Area : Operations and Management > Stream : IETF > Verifying Party : IESG > > . > From nobody Wed Jan 14 05:02:30 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8C42F1B2C95 for ; Wed, 14 Jan 2015 04:57:34 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.599 X-Spam-Level: X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 4kUlQTNKaMrw for ; Wed, 14 Jan 2015 04:57:31 -0800 (PST) Received: from relais-inet.francetelecom.com (relais-ias92.francetelecom.com [193.251.215.92]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id EEAA11B2C83 for ; Wed, 14 Jan 2015 04:57:30 -0800 (PST) Received: from omfedm08.si.francetelecom.fr (unknown [xx.xx.xx.4]) by omfedm13.si.francetelecom.fr (ESMTP service) with ESMTP id 5947A32423D; Wed, 14 Jan 2015 13:57:29 +0100 (CET) Received: from Exchangemail-eme1.itn.ftgroup (unknown [10.114.1.186]) by omfedm08.si.francetelecom.fr (ESMTP service) with ESMTP id 2E44B238072; Wed, 14 Jan 2015 13:57:29 +0100 (CET) Received: from PEXCVZYM13.corporate.adroot.infra.ftgroup ([fe80::cc7e:e40b:42ef:164e]) by PEXCVZYH01.corporate.adroot.infra.ftgroup ([::1]) with mapi id 14.03.0224.002; Wed, 14 Jan 2015 13:57:27 +0100 From: To: MORAND Lionel IMT/OLN , RFC Errata System , "vf0213@gmail.com" , "jari.arkko@ericsson.com" , "john.loughney@nokia.com" , "glenzorn@gmail.com" , "bclaise@cisco.com" , "joelja@bogus.com" , "jouni.nospam@gmail.com" Thread-Topic: [Editorial Errata Reported] RFC6733 (4210) Thread-Index: AQHQINLSBW5CLwQOE0muYZ1BflrdvJyiIc9ggB2PWDA= Date: Wed, 14 Jan 2015 12:57:26 +0000 Message-ID: <21181_1421240249_54B667B9_21181_2808_1_89b0938a-8687-47a5-9c8e-eeabbf73245d@PEXCVZYH01.corporate.adroot.infra.ftgroup> References: <20141226061052.C99B318008C@rfc-editor.org> <19574_1419615292_549D9C3C_19574_2784_1_6B7134B31289DC4FAF731D844122B36EA6E945@PEXCVZYM13.corporate.adroot.infra.ftgroup> In-Reply-To: <19574_1419615292_549D9C3C_19574_2784_1_6B7134B31289DC4FAF731D844122B36EA6E945@PEXCVZYM13.corporate.adroot.infra.ftgroup> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.197.38.4] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-PMX-Version: 6.0.3.2322014, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2014.12.22.190922 Archived-At: X-Mailman-Approved-At: Wed, 14 Jan 2015 05:02:29 -0800 Cc: "dime@ietf.org" , "Hans.Liu@alcatel-lucent.com" Subject: Re: [Dime] [Editorial Errata Reported] RFC6733 (4210) X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Jan 2015 12:57:34 -0000 SGkgQmVub2l0LA0KDQpJIGhhdmUgYWxyZWFkeSBnaXZlbiBteSB2aWV3IG9uIHRoaXMgZXJyYXRh IHJlcG9ydGVkLg0KQnV0IEkgbGV0IG90aGVycyBwcm92aWRlIGFkZGl0aW9uYWwgZmVlZGJhY2sg aWYgcmVxdWlyZWQuDQoNCkxpb25lbA0KDQotLS0tLU1lc3NhZ2UgZCdvcmlnaW5lLS0tLS0NCkRl wqA6IERpTUUgW21haWx0bzpkaW1lLWJvdW5jZXNAaWV0Zi5vcmddIERlIGxhIHBhcnQgZGUgbGlv bmVsLm1vcmFuZEBvcmFuZ2UuY29tDQpFbnZvecOpwqA6IHZlbmRyZWRpIDI2IGTDqWNlbWJyZSAy MDE0IDE4OjM1DQrDgMKgOiBSRkMgRXJyYXRhIFN5c3RlbTsgdmYwMjEzQGdtYWlsLmNvbTsgamFy aS5hcmtrb0Blcmljc3Nvbi5jb207IGpvaG4ubG91Z2huZXlAbm9raWEuY29tOyBnbGVuem9ybkBn bWFpbC5jb207IGJjbGFpc2VAY2lzY28uY29tOyBqb2VsamFAYm9ndXMuY29tOyBqb3VuaS5ub3Nw 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ZXJhdGlvbiwKT3JhbmdlIGRlY2xpbmUgdG91dGUgcmVzcG9uc2FiaWxpdGUgc2kgY2UgbWVzc2Fn ZSBhIGV0ZSBhbHRlcmUsIGRlZm9ybWUgb3UgZmFsc2lmaWUuIE1lcmNpLgoKVGhpcyBtZXNzYWdl IGFuZCBpdHMgYXR0YWNobWVudHMgbWF5IGNvbnRhaW4gY29uZmlkZW50aWFsIG9yIHByaXZpbGVn ZWQgaW5mb3JtYXRpb24gdGhhdCBtYXkgYmUgcHJvdGVjdGVkIGJ5IGxhdzsKdGhleSBzaG91bGQg bm90IGJlIGRpc3RyaWJ1dGVkLCB1c2VkIG9yIGNvcGllZCB3aXRob3V0IGF1dGhvcmlzYXRpb24u CklmIHlvdSBoYXZlIHJlY2VpdmVkIHRoaXMgZW1haWwgaW4gZXJyb3IsIHBsZWFzZSBub3RpZnkg dGhlIHNlbmRlciBhbmQgZGVsZXRlIHRoaXMgbWVzc2FnZSBhbmQgaXRzIGF0dGFjaG1lbnRzLgpB cyBlbWFpbHMgbWF5IGJlIGFsdGVyZWQsIE9yYW5nZSBpcyBub3QgbGlhYmxlIGZvciBtZXNzYWdl cyB0aGF0IGhhdmUgYmVlbiBtb2RpZmllZCwgY2hhbmdlZCBvciBmYWxzaWZpZWQuClRoYW5rIHlv dS4KCg== From nobody Wed Jan 14 05:06:18 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8D2E41B2C95 for ; Wed, 14 Jan 2015 05:05:43 -0800 (PST) X-Virus-Scanned: 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+0100 From: Benoit Claise User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.7.0 MIME-Version: 1.0 To: lionel.morand@orange.com, RFC Errata System , "vf0213@gmail.com" , "jari.arkko@ericsson.com" , "john.loughney@nokia.com" , "glenzorn@gmail.com" , "joelja@bogus.com" , "jouni.nospam@gmail.com" References: <20141226061052.C99B318008C@rfc-editor.org> <19574_1419615292_549D9C3C_19574_2784_1_6B7134B31289DC4FAF731D844122B36EA6E945@PEXCVZYM13.corporate.adroot.infra.ftgroup> <21181_1421240249_54B667B9_21181_2808_1_89b0938a-8687-47a5-9c8e-eeabbf73245d@PEXCVZYH01.corporate.adroot.infra.ftgroup> In-Reply-To: <21181_1421240249_54B667B9_21181_2808_1_89b0938a-8687-47a5-9c8e-eeabbf73245d@PEXCVZYH01.corporate.adroot.infra.ftgroup> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Archived-At: X-Mailman-Approved-At: Wed, 14 Jan 2015 05:06:16 -0800 Cc: "dime@ietf.org" , "Hans.Liu@alcatel-lucent.com" Subject: Re: [Dime] [Editorial Errata Reported] RFC6733 (4210) X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Jan 2015 13:05:43 -0000 Hi Lionel, I mixed up 2 erratum: 4210 and 4209. 4210 has already been treated. Sorry for the confusion Regards, Benoit > Hi Benoit, > > I have already given my view on this errata reported. > But I let others provide additional feedback if required. > > Lionel > > -----Message d'origine----- > De : DiME [mailto:dime-bounces@ietf.org] De la part de lionel.morand@orange.com > Envoyé : vendredi 26 décembre 2014 18:35 > À : RFC Errata System; vf0213@gmail.com; jari.arkko@ericsson.com; john.loughney@nokia.com; glenzorn@gmail.com; bclaise@cisco.com; joelja@bogus.com; jouni.nospam@gmail.com > Cc : dime@ietf.org; Hans.Liu@alcatel-lucent.com > Objet : Re: [Dime] [Editorial Errata Reported] RFC6733 (4210) > > Diameter is a peer-to-peer protocol and peers are Diameter nodes sharing a Diameter transport connection. Therefore, a "peer" can be either the sender or the receiver of the request, depending on the context. > I don't think that the proposed correction is justified. > > regards, > > Lionel > > -----Message d'origine----- > De : RFC Errata System [mailto:rfc-editor@rfc-editor.org] > Envoyé : vendredi 26 décembre 2014 07:11 À : vf0213@gmail.com; jari.arkko@ericsson.com; john.loughney@nokia.com; glenzorn@gmail.com; bclaise@cisco.com; joelja@bogus.com; jouni.nospam@gmail.com; MORAND Lionel IMT/OLN Cc : Hans.Liu@alcatel-lucent.com; dime@ietf.org; rfc-editor@rfc-editor.org Objet : [Editorial Errata Reported] RFC6733 (4210) > > The following errata report has been submitted for RFC6733, "Diameter Base Protocol". > > -------------------------------------- > You may review the report below and at: > http://www.rfc-editor.org/errata_search.php?rfc=6733&eid=4210 > > -------------------------------------- > Type: Editorial > Reported by: Hans Liu > > Section: 5.4.3 > > Original Text > ------------- > The Disconnect-Cause AVP (AVP Code 273) is of type Enumerated. A > Diameter node MUST include this AVP in the Disconnect-Peer-Request > message to inform the peer of the reason for its intention to shut > down the transport connection. The following values are supported: > REBOOTING 0 > A scheduled reboot is imminent. A receiver of a DPR with > above result code MAY attempt reconnection. > BUSY 1 > The peer’s internal resources are constrained, and it has > determined that the transport connection needs to be closed. > A receiver of a DPR with above result code SHOULD NOT attempt > reconnection. > DO_NOT_WANT_TO_TALK_TO_YOU 2 > The peer has determined that it does not see a need for the > transport connection to exist, since it does not expect any > messages to be exchanged in the near future. A receiver of a > DPR with above result code SHOULD NOT attempt reconnection. > > Corrected Text > -------------- > The Disconnect-Cause AVP (AVP Code 273) is of type Enumerated. A > Diameter node MUST include this AVP in the Disconnect-Peer-Request > message to inform the peer of the reason for its intention to shut > down the transport connection. The following values are supported: > REBOOTING 0 > A scheduled reboot is imminent. A receiver of a DPR with > above result code MAY attempt reconnection. > BUSY 1 > The internal resources are constrained, and it has > determined that the transport connection needs to be closed. > A receiver of a DPR with above result code SHOULD NOT attempt > reconnection. > DO_NOT_WANT_TO_TALK_TO_YOU 2 > The node has determined that it does not see a need for the > transport connection to exist, since it does not expect any > messages to be exchanged in the near future. A receiver of a > DPR with above result code SHOULD NOT attempt reconnection. > > Notes > ----- > The "peer" in 1st paragraph represents the receiver. However in the descriptions for cause values the "peer" represents the sender. > > Instructions: > ------------- > This erratum is currently posted as "Reported". If necessary, please use "Reply All" to discuss whether it should be verified or rejected. When a decision is reached, the verifying party (IESG) can log in to change the status and edit the report, if necessary. > > -------------------------------------- > RFC6733 (draft-ietf-dime-rfc3588bis-33) > -------------------------------------- > Title : Diameter Base Protocol > Publication Date : October 2012 > Author(s) : V. Fajardo, Ed., J. Arkko, J. Loughney, G. Zorn, Ed. > Category : PROPOSED STANDARD > Source : Diameter Maintenance and Extensions > Area : Operations and Management > Stream : IETF > Verifying Party : IESG > > > _________________________________________________________________________________________________________________________ > > Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration, Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. > > This message and its attachments may contain confidential or privileged information that may be protected by law; they should not be distributed, used or copied without authorisation. > If you have received this email in error, please notify the sender and delete this message and its attachments. > As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified. > Thank you. > > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime > > _________________________________________________________________________________________________________________________ > > Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc > pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler > a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration, > Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. > > This message and its attachments may contain confidential or privileged information that may be protected by law; > they should not be distributed, used or copied without authorisation. > If you have received this email in error, please notify the sender and delete this message and its attachments. > As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified. > Thank you. > From nobody Wed Jan 14 07:20:34 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D08331A6F32 for ; Wed, 14 Jan 2015 07:20:32 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.599 X-Spam-Level: X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id kS7X2lGbfZRE for ; Wed, 14 Jan 2015 07:20:30 -0800 (PST) Received: from relais-inet.francetelecom.com (relais-ias91.francetelecom.com [193.251.215.91]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7B5901A1B91 for ; Wed, 14 Jan 2015 07:20:29 -0800 (PST) Received: from omfedm06.si.francetelecom.fr (unknown [xx.xx.xx.2]) by omfedm12.si.francetelecom.fr (ESMTP service) with ESMTP id B67B418C547; Wed, 14 Jan 2015 16:20:27 +0100 (CET) Received: from Exchangemail-eme1.itn.ftgroup (unknown [10.114.1.186]) by omfedm06.si.francetelecom.fr (ESMTP service) with ESMTP id 872F927C0D6; Wed, 14 Jan 2015 16:20:27 +0100 (CET) Received: from PEXCVZYM13.corporate.adroot.infra.ftgroup ([fe80::cc7e:e40b:42ef:164e]) by PEXCVZYH01.corporate.adroot.infra.ftgroup ([::1]) with mapi id 14.03.0224.002; Wed, 14 Jan 2015 16:20:27 +0100 From: To: Benoit Claise , "vf0213@gmail.com" , "jari.arkko@ericsson.com" , "john.loughney@nokia.com" , "glenzorn@gmail.com" , "joelja@bogus.com" , "jouni.nospam@gmail.com" Thread-Topic: [Technical Errata Reported] RFC6733 (4209) Thread-Index: AQHQL+px6w7vD76z7E2n/BIi+JbfkJy/svSQ Date: Wed, 14 Jan 2015 15:20:26 +0000 Message-ID: <22101_1421248827_54B6893B_22101_5524_1_6B7134B31289DC4FAF731D844122B36EB0A6AB@PEXCVZYM13.corporate.adroot.infra.ftgroup> References: <20141226060357.493B018008C@rfc-editor.org> <54B64E2E.1080908@cisco.com> In-Reply-To: <54B64E2E.1080908@cisco.com> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.197.38.4] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-PMX-Version: 6.0.3.2322014, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2014.12.22.202419 Archived-At: Cc: "dime@ietf.org" , "Hans.Liu@alcatel-lucent.com" Subject: Re: [Dime] [Technical Errata Reported] RFC6733 (4209) X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Jan 2015 15:20:33 -0000 SGVyZSBpcyBteSB2aWV3IG9uIHRoaXMgZXJyYXR1bToNCg0KVGhlIHRleHQgZGVzY3JpYmluZyB0 aGUgIkJVU1kiIGFuZCAiRE9fTk9UX1dBTlRfVE9fVEFMS19UT19ZT1UiIGNhc2VzIGlzIGNvbnNp c3RlbnQgd2l0aCB0aGUgdGV4dCBmb3VuZCBpbiB0aGUgaW50cm9kdWN0aW9uIG9mIHRoZSBzZWN0 aW9uIDUuNC4NCg0KICAiSW4gdGhlIGV2ZW50IHRoYXQgdGhlDQogICBkaXNjb25uZWN0IHdhcyBh IHJlc3VsdCBvZiBlaXRoZXIgYSBzaG9ydGFnZSBvZiBpbnRlcm5hbCByZXNvdXJjZXMgb3INCiAg IHNpbXBseSB0aGF0IHRoZSBub2RlIGluIHF1ZXN0aW9uIGhhcyBubyBpbnRlbnRpb25zIG9mIGZv cndhcmRpbmcgYW55DQogICBEaWFtZXRlciBtZXNzYWdlcyB0byB0aGUgcGVlciBpbiB0aGUgZm9y ZXNlZWFibGUgZnV0dXJlLCBhIHBlcmlvZGljDQogICBjb25uZWN0aW9uIHJlcXVlc3Qgd291bGQg bm90IGJlIHdlbGNvbWVkLiAgVGhlIERpc2Nvbm5lY3Rpb24tUmVhc29uDQogICBBVlAgY29udGFp 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cyB0aGF0IGhhdmUgYmVlbiBtb2RpZmllZCwgY2hhbmdlZCBvciBmYWxzaWZpZWQuClRoYW5rIHlv dS4KCg== From nobody Wed Jan 14 08:10:49 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D70ED1A8AF8 for ; Wed, 14 Jan 2015 08:10:46 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.121 X-Spam-Level: X-Spam-Status: No, score=-1.121 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_NEUTRAL=0.779] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id iUK7C4L1WeLZ for ; Wed, 14 Jan 2015 08:10:43 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 65B691A8AAE for ; Wed, 14 Jan 2015 08:10:43 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:57841 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1YBQWl-0009mT-Nw for dime@ietf.org; Wed, 14 Jan 2015 08:10:42 -0800 Message-ID: <54B694FF.9010000@usdonovans.com> Date: Wed, 14 Jan 2015 10:10:39 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: dime@ietf.org References: <5486FE71.70205@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D900066815235215@DEMUMBX014.nsn-intra.net> <54884137.4050209@usdonovans.com> <5AB8BAC5-3CBD-432E-9631-74DF40795844@nostrum.com> <5489A498.5070203@usdonovans.com> <5489EFAF.8010702@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D9000668152358E0@DEMUMBX014.nsn-intra.net> <549046D3.3090104@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D900066815235AB9@DEMUMBX014.nsn-intra.net> 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authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: Subject: Re: [Dime] Ulrich's suggested change #15 X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Jan 2015 16:10:47 -0000 Agreed, these paragraphs can be removed. Steve On 1/14/15 3:39 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: > Steve, > > the -06 draft still has the paragraphs in section 5.2.1.3: > > When receiving an answer message with multiple OLRs and multiple of > the OLRs are of the same supported report types, a reacting node > SHOULD ignore the duplicated OLRs. > > A reacting node SHOULD ignore an OC-OLR with a OC-Report-Type AVP > that contains an unrecognized value. > > This text is specifying behaviour on what you do when the peer violates the protocol. > Ben pointed out that > > ------- > "we don't need to specify behavior on what you do when the peer violates the protocol. If a reacting node receives an answer with two OLRs of the same type, or with an OLR of a type it doesn't recognize, what it does is local policy. It could ignore all further DOIC information from that reacting node, and treat it like a non-supporting node. It could ignore all the OLRs in the message, but continue to exchange OC-S-Fs. It could process some (or one) of the OLRs and ignore the rest. It's up to the implementors to decide. > > BTW, we don't need text to say that, unless we want to actually favor one strategy over another." > ------- > > My understanding was that we agreed to delete these two paragraphs as we did not agree on a favoured strategy. > > Regards > Ulrich > > > > -----Original Message----- > From: Wiehe, Ulrich (NSN - DE/Munich) > Sent: Tuesday, December 23, 2014 7:55 PM > To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell > Cc: dime@ietf.org > Subject: RE: [Dime] Ulrich's suggested change #15 > > With this clarification I withdraw my request for explicit statements; simply deleting the paragraph is sufficient. > Ulrich > > -----Original Message----- > From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Wiehe, Ulrich (NSN - DE/Munich) > Sent: Tuesday, December 23, 2014 5:54 PM > To: ext Ben Campbell > Cc: dime@ietf.org > Subject: Re: [Dime] Ulrich's suggested change #15 > > Thank you for the clarification. > > -----Original Message----- > From: ext Ben Campbell [mailto:ben@nostrum.com] > Sent: Tuesday, December 23, 2014 5:41 PM > To: Wiehe, Ulrich (NSN - DE/Munich) > Cc: ext Steve Donovan; dime@ietf.org > Subject: Re: [Dime] Ulrich's suggested change #15 > > >> On Dec 23, 2014, at 9:55 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: >> >> When the reporting node is doing things wrong, i.e. sends an OLR of a type that was not advertized (implicitly or explicitly), or sends two OLRs of same type, although the spec says "MUST NOT do so", we cannot expect the reacting node to sort things out. > Given the current MUST NOT, I agree. As I've mentioned in the past, we don't need to specify behavior on what you do when the peer violates the protocol. If a reacting node receives an answer with two OLRs of the same type, or with an OLR of a type it doesn't recognize, what it does is local policy. It could ignore all further DOIC information from that reacting node, and treat it like a non-supporting node. It could ignore all the OLRs in the message, but continue to exchange OC-S-Fs. It could process some (or one) of the OLRs and ignore the rest. It's up to the implementors to decide. > > BTW, we don't need text to say that, unless we want to actually favor one strategy over another. > >> I do not agree to relax the "MUST NOT do so" requirement for the reporting node. >> > I did not seriously expect us to. I just tossed it out as something to think about. > >> -----Original Message----- >> From: ext Ben Campbell [mailto:ben@nostrum.com] >> Sent: Tuesday, December 23, 2014 4:06 PM >> To: Wiehe, Ulrich (NSN - DE/Munich) >> Cc: ext Steve Donovan; dime@ietf.org >> Subject: Re: [Dime] Ulrich's suggested change #15 >> >> I don't object to allowing that behavior. But thinking of a less extreme case, where you have two OC-OLRs and only recognize one, I think it would be poor design to ignore the one you do recognize. OTOH, it's not the IETF's job to prevent bad design, as long as it's interoperable and doesn't break everyone else (and the network.) >> >> But we might want to consider the fact that this puts the work upon the overloaded reporting node to make things right, rather than on the reacting node to figure it out. For example, the use cases I've describe in a separate thread, where you have multiple reacting nodes with different capabilities, might could be mitigated by allowing (not requiring) the reporting node put the OC-OLRs for both in each answer. We don't currently allow that unless they are different types, but I wonder if we should think about relaxing that. >> >>> On Dec 23, 2014, at 6:30 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: >>> >>> No, that was not what I’m after. >>> >>> Imagine the (unlikely) case where an answer message contains hundreds of OC-OLR AVPs. >>> >>> In this case I want the reacting node to be allowed >>> - Not to scan through all the OC-OLR AVPs to see whether there is a supported and not duplicated OLR >>> - To ignore the complete set of OC-OLR AVPs if at least one of the OLR contains an unsupported report-type or at least two of the OLRs contain the same report type. >>> >>> As soon as the reacting node detects that there is something wrong with the set of OLRs it may ignore the complete set of OLRs. >>> >>> Regards >>> Ulrich >>> >>> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com] >>> Sent: Monday, December 22, 2014 3:12 PM >>> To: Wiehe, Ulrich (NSN - DE/Munich); Ben Campbell >>> Cc: dime@ietf.org >>> Subject: Re: [Dime] Ulrich's suggested change #15 >>> >>> I have added the following statements: >>> >>> When receiving an answer message with multiple OLRs and multiple of >>> the OLRs are of the same supported report types, a reporting node >>> SHOULD ignore the duplicated OLRs. >>> >>> A reacting node SHOULD ignore an OC-OLR with a OC-Report-Type AVP >>> that contains an unrecognized value. >>> Regards, >>> >>> Steve >>> >>> On 12/17/14 2:49 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: >>> Yes please. >>> >>> -----Original Message----- >>> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com] >>> Sent: Tuesday, December 16, 2014 3:51 PM >>> To: Wiehe, Ulrich (NSN - DE/Munich); Ben Campbell >>> Cc: dime@ietf.org >>> Subject: Re: [Dime] Ulrich's suggested change #15 >>> >>> I'll delete the paragraph. >>> >>> Do we need explicit statements for the two conditions below? >>> >>> Steve >>> >>> >>> On 12/15/14, 11:56 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: >>> Steve, Ben, >>> >>> I'm fine with deleting the paragraph. >>> But for my clarification please confirm that ignoring the complete set of OLRs is allowed when one of these OLRs contains a report type that was not advertized, or two of the OLRs contain the same report type. >>> >>> Regards >>> Ulrich >>> >>> >>> >>> -----Original Message----- >>> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com] >>> Sent: Thursday, December 11, 2014 8:26 PM >>> To: Ben Campbell >>> Cc: Wiehe, Ulrich (NSN - DE/Munich); dime@ietf.org >>> Subject: Re: [Dime] Ulrich's suggested change #15 >>> >>> >>> On 12/11/14, 12:51 PM, Ben Campbell wrote: >>> On Dec 11, 2014, at 8:05 AM, Steve Donovan wrote: >>> >>> I thought this paragraph was covering unrecognized values for all AVPs. >>> I agree that's what it covered. But I think we failed to cover the unrecognized AVP case. If we don't have anything to say beyond what 6733 says, then it might not be strictly necessary, but it might still be worth saying that "unrecognized sub-AVPs are treated as per RFC6733". >>> That is probably worth saying. >>> Maybe it is better to remove the paragraph entirely and make sure that the definition of each AVP addresses what is done with unrecognized values. >>> Possibly. There are AVPs where there's no such thing as an unrecognized value. There may be AVPs where the allowed values vary by algorithm. If we do take that route, we probably need language here that says unrecognized values are handled as described by the AVP definition or the algorithm. >>> Agreed. >>> Steve >>> >>> On 12/10/14, 5:26 PM, Ben Campbell wrote: >>> On Dec 10, 2014, at 6:48 AM, Steve Donovan wrote: >>> >>> Ulrich, >>> >>> Actually, the wording you suggested wasn't quite right. It should be: >>> >>> When receiving an OC-OLR AVP with unknown values, the overload report >>> SHOULD be silently discarded by reacting nodes and the event SHOULD >>> be logged. >>> >>> It's not just about report type values but unknown values for any of the AVPs in the OLR. >>> >>> This seems like a good requirement to include in the specification to ensure common behavior in reacting nodes. I don't feel strongly about this but I would like to hear other opinions. >>> I think this is still not quite complete. >>> >>> If you receive a sub-AVP that you don't understand, then you should ignore that sub-avp, not the whole OC-OLR AVP. (Unless of course the unknown AVP has the m-bit set.) If you receive a known sub-AVP, with a value you don't understand, the behavior should be AVP specific. For Report-Type, that means ignore the whole OLR. >>> >>> It's not clear to me whether the original text was about arbitrary avps, or Report-Type. >>> >>> Steve >>> >>> On 12/9/14, 11:04 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: >>> Hi Steve, >>> >>> I think it was pointed out by Ben that we do not specify behaviour of a node for cases where it detects that another node is breaking the rule. >>> The rule is: >>> A reporting node MUST NOT send overload reports of a type that has >>> not been advertised as supported by the reacting node. >>> See section 4.2.3. >>> >>> Regards >>> Ulrich >>> >>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Steve Donovan >>> Sent: Tuesday, December 09, 2014 2:52 PM >>> To: dime@ietf.org >>> Subject: [Dime] Ulrich's suggested change #15 >>> >>> Ulrich, >>> >>> For your suggested change #15: >>> Section 4.2.1.3, 4th paragraph: >>> Existing text: >>> When receiving an OC-OLR AVPs with unknown values, a reacting node >>> SHOULD be silently discarded by reacting nodes and the event SHOULD >>> be logged. >>> Comment: text is confusing. Maybe the intention was to say: >>> When receiving an OC-OLR AVPs with an unsupported report type value, a reacting node >>> SHOULD silently discarded the OC-OLR AVP and the event SHOULD >>> be logged. >>> But even that is not correct. >>> Proposal: Remove the paragraph. >>> The intent was that an OC-OLR that contains unknown values should be discarded. I agree that the wording needs to be changes as you suggested. I don't agree with removing the paragraph. Can you elaborate on why you think it is not correct when changed as you suggested? >>> >>> Regards, >>> >>> Steve >>> >>> _______________________________________________ >>> DiME mailing list >>> DiME@ietf.org >>> https://www.ietf.org/mailman/listinfo/dime >>> >>> >>> >>> > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime From nobody Wed Jan 14 15:16:34 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C62651B2A54 for ; Wed, 14 Jan 2015 15:16:32 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.91 X-Spam-Level: X-Spam-Status: No, score=-1.91 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qlp-dnS9Jj6p for ; Wed, 14 Jan 2015 15:16:29 -0800 (PST) Received: from nostrum.com (raven-v6.nostrum.com [IPv6:2001:470:d:1130::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 68B201B2A52 for ; Wed, 14 Jan 2015 15:16:29 -0800 (PST) Received: from [10.0.1.23] (cpe-173-172-146-58.tx.res.rr.com [173.172.146.58]) (authenticated bits=0) by nostrum.com (8.14.9/8.14.7) with ESMTP id t0ENGR6V028820 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 14 Jan 2015 17:16:28 -0600 (CST) (envelope-from ben@nostrum.com) X-Authentication-Warning: raven.nostrum.com: Host cpe-173-172-146-58.tx.res.rr.com [173.172.146.58] claimed to be [10.0.1.23] Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) From: Ben Campbell In-Reply-To: <54B694FF.9010000@usdonovans.com> Date: Wed, 14 Jan 2015 17:16:27 -0600 X-Mao-Original-Outgoing-Id: 442970187.571402-5c5a2218aa6c7acb5c4f321814a603e1 Content-Transfer-Encoding: quoted-printable Message-Id: <2B69CECA-B577-4EC0-A9A2-9E08BA68493A@nostrum.com> References: <5486FE71.70205@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D900066815235215@DEMUMBX014.nsn-intra.net> <54884137.4050209@usdonovans.com> <5AB8BAC5-3CBD-432E-9631-74DF40795844@nostrum.com> <5489A498.5070203@usdonovans.com> <5489EFAF.8010702@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D9000668152358E0@DEMUMBX014.nsn-intra.net> <549046D3.3090104@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D900066815235AB9@DEMUMBX014.nsn-intra.net> <549826C8.1090809@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D900066815239CB6@DEMUMBX014.nsn-intra.net> <1FC86658-AB09-4C11-9ED1-0C7FAFC542BE@nostrum.com> <5BCBA1FC2B7F0B4C9D935572D90006681523ACF5@DEMUMBX014.nsn-intra.net> <5BCBA1FC2B7F0B4C9D935572D90006681523AD21@DEMUMBX014.nsn-intra.net> <5BCBA1FC2B7F0B4C9D935572D90006681523AD55@DEMUMBX014.nsn-intra.net> <5BCBA1FC2B7F0B4C9D935572D90006681523EEF1@DEMUMBX014.nsn-intra.net> <54B694FF.9010000@usdonovan! s.com> To: Steve Donovan X-Mailer: Apple Mail (2.1993) Archived-At: Cc: dime@ietf.org Subject: Re: [Dime] Ulrich's suggested change #15 X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Jan 2015 23:16:33 -0000 I agree. > On Jan 14, 2015, at 10:10 AM, Steve Donovan = wrote: >=20 > Agreed, these paragraphs can be removed. >=20 > Steve >=20 > On 1/14/15 3:39 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: >> Steve, >>=20 >> the -06 draft still has the paragraphs in section 5.2.1.3: >>=20 >> When receiving an answer message with multiple OLRs and multiple = of >> the OLRs are of the same supported report types, a reacting node >> SHOULD ignore the duplicated OLRs. >>=20 >> A reacting node SHOULD ignore an OC-OLR with a OC-Report-Type AVP >> that contains an unrecognized value. >>=20 >> This text is specifying behaviour on what you do when the peer = violates the protocol. >> Ben pointed out that >>=20 >> ------- >> "we don't need to specify behavior on what you do when the peer = violates the protocol. If a reacting node receives an answer with two = OLRs of the same type, or with an OLR of a type it doesn't recognize, = what it does is local policy. It could ignore all further DOIC = information from that reacting node, and treat it like a non-supporting = node. It could ignore all the OLRs in the message, but continue to = exchange OC-S-Fs. It could process some (or one) of the OLRs and ignore = the rest. It's up to the implementors to decide. >>=20 >> BTW, we don't need text to say that, unless we want to actually favor = one strategy over another." >> ------- >>=20 >> My understanding was that we agreed to delete these two paragraphs as = we did not agree on a favoured strategy. >>=20 >> Regards >> Ulrich >>=20 >>=20 >>=20 >> -----Original Message----- >> From: Wiehe, Ulrich (NSN - DE/Munich) >> Sent: Tuesday, December 23, 2014 7:55 PM >> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell >> Cc: dime@ietf.org >> Subject: RE: [Dime] Ulrich's suggested change #15 >>=20 >> With this clarification I withdraw my request for explicit = statements; simply deleting the paragraph is sufficient. >> Ulrich >>=20 >> -----Original Message----- >> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Wiehe, = Ulrich (NSN - DE/Munich) >> Sent: Tuesday, December 23, 2014 5:54 PM >> To: ext Ben Campbell >> Cc: dime@ietf.org >> Subject: Re: [Dime] Ulrich's suggested change #15 >>=20 >> Thank you for the clarification. >>=20 >> -----Original Message----- >> From: ext Ben Campbell [mailto:ben@nostrum.com] >> Sent: Tuesday, December 23, 2014 5:41 PM >> To: Wiehe, Ulrich (NSN - DE/Munich) >> Cc: ext Steve Donovan; dime@ietf.org >> Subject: Re: [Dime] Ulrich's suggested change #15 >>=20 >>=20 >>> On Dec 23, 2014, at 9:55 AM, Wiehe, Ulrich (NSN - DE/Munich) = wrote: >>>=20 >>> When the reporting node is doing things wrong, i.e. sends an OLR of = a type that was not advertized (implicitly or explicitly), or sends two = OLRs of same type, although the spec says "MUST NOT do so", we cannot = expect the reacting node to sort things out. >> Given the current MUST NOT, I agree. As I've mentioned in the past, = we don't need to specify behavior on what you do when the peer violates = the protocol. If a reacting node receives an answer with two OLRs of the = same type, or with an OLR of a type it doesn't recognize, what it does = is local policy. It could ignore all further DOIC information from that = reacting node, and treat it like a non-supporting node. It could ignore = all the OLRs in the message, but continue to exchange OC-S-Fs. It could = process some (or one) of the OLRs and ignore the rest. It's up to the = implementors to decide. >>=20 >> BTW, we don't need text to say that, unless we want to actually favor = one strategy over another. >>=20 >>> I do not agree to relax the "MUST NOT do so" requirement for the = reporting node. >>>=20 >> I did not seriously expect us to. I just tossed it out as something = to think about. >>=20 >>> -----Original Message----- >>> From: ext Ben Campbell [mailto:ben@nostrum.com] >>> Sent: Tuesday, December 23, 2014 4:06 PM >>> To: Wiehe, Ulrich (NSN - DE/Munich) >>> Cc: ext Steve Donovan; dime@ietf.org >>> Subject: Re: [Dime] Ulrich's suggested change #15 >>>=20 >>> I don't object to allowing that behavior. But thinking of a less = extreme case, where you have two OC-OLRs and only recognize one, I think = it would be poor design to ignore the one you do recognize. OTOH, it's = not the IETF's job to prevent bad design, as long as it's interoperable = and doesn't break everyone else (and the network.) >>>=20 >>> But we might want to consider the fact that this puts the work upon = the overloaded reporting node to make things right, rather than on the = reacting node to figure it out. For example, the use cases I've describe = in a separate thread, where you have multiple reacting nodes with = different capabilities, might could be mitigated by allowing (not = requiring) the reporting node put the OC-OLRs for both in each answer. = We don't currently allow that unless they are different types, but I = wonder if we should think about relaxing that. >>>=20 >>>> On Dec 23, 2014, at 6:30 AM, Wiehe, Ulrich (NSN - DE/Munich) = wrote: >>>>=20 >>>> No, that was not what I=E2=80=99m after. >>>>=20 >>>> Imagine the (unlikely) case where an answer message contains = hundreds of OC-OLR AVPs. >>>>=20 >>>> In this case I want the reacting node to be allowed >>>> - Not to scan through all the OC-OLR AVPs to see whether = there is a supported and not duplicated OLR >>>> - To ignore the complete set of OC-OLR AVPs if at least = one of the OLR contains an unsupported report-type or at least two of = the OLRs contain the same report type. >>>>=20 >>>> As soon as the reacting node detects that there is something wrong = with the set of OLRs it may ignore the complete set of OLRs. >>>>=20 >>>> Regards >>>> Ulrich >>>>=20 >>>> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com] >>>> Sent: Monday, December 22, 2014 3:12 PM >>>> To: Wiehe, Ulrich (NSN - DE/Munich); Ben Campbell >>>> Cc: dime@ietf.org >>>> Subject: Re: [Dime] Ulrich's suggested change #15 >>>>=20 >>>> I have added the following statements: >>>>=20 >>>> When receiving an answer message with multiple OLRs and multiple = of >>>> the OLRs are of the same supported report types, a reporting node >>>> SHOULD ignore the duplicated OLRs. >>>>=20 >>>> A reacting node SHOULD ignore an OC-OLR with a OC-Report-Type AVP >>>> that contains an unrecognized value. >>>> Regards, >>>>=20 >>>> Steve >>>>=20 >>>> On 12/17/14 2:49 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: >>>> Yes please. >>>>=20 >>>> -----Original Message----- >>>> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com] >>>> Sent: Tuesday, December 16, 2014 3:51 PM >>>> To: Wiehe, Ulrich (NSN - DE/Munich); Ben Campbell >>>> Cc: dime@ietf.org >>>> Subject: Re: [Dime] Ulrich's suggested change #15 >>>>=20 >>>> I'll delete the paragraph. >>>>=20 >>>> Do we need explicit statements for the two conditions below? >>>>=20 >>>> Steve >>>>=20 >>>>=20 >>>> On 12/15/14, 11:56 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: >>>> Steve, Ben, >>>>=20 >>>> I'm fine with deleting the paragraph. >>>> But for my clarification please confirm that ignoring the complete = set of OLRs is allowed when one of these OLRs contains a report type = that was not advertized, or two of the OLRs contain the same report = type. >>>>=20 >>>> Regards >>>> Ulrich >>>>=20 >>>>=20 >>>>=20 >>>> -----Original Message----- >>>> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com] >>>> Sent: Thursday, December 11, 2014 8:26 PM >>>> To: Ben Campbell >>>> Cc: Wiehe, Ulrich (NSN - DE/Munich); dime@ietf.org >>>> Subject: Re: [Dime] Ulrich's suggested change #15 >>>>=20 >>>>=20 >>>> On 12/11/14, 12:51 PM, Ben Campbell wrote: >>>> On Dec 11, 2014, at 8:05 AM, Steve Donovan = wrote: >>>>=20 >>>> I thought this paragraph was covering unrecognized values for all = AVPs. >>>> I agree that's what it covered. But I think we failed to cover the = unrecognized AVP case. If we don't have anything to say beyond what 6733 = says, then it might not be strictly necessary, but it might still be = worth saying that "unrecognized sub-AVPs are treated as per RFC6733". >>>> That is probably worth saying. >>>> Maybe it is better to remove the paragraph entirely and make sure = that the definition of each AVP addresses what is done with unrecognized = values. >>>> Possibly. There are AVPs where there's no such thing as an = unrecognized value. There may be AVPs where the allowed values vary by = algorithm. If we do take that route, we probably need language here that = says unrecognized values are handled as described by the AVP definition = or the algorithm. >>>> Agreed. >>>> Steve >>>>=20 >>>> On 12/10/14, 5:26 PM, Ben Campbell wrote: >>>> On Dec 10, 2014, at 6:48 AM, Steve Donovan = wrote: >>>>=20 >>>> Ulrich, >>>>=20 >>>> Actually, the wording you suggested wasn't quite right. It should = be: >>>>=20 >>>> When receiving an OC-OLR AVP with unknown values, the overload = report >>>> SHOULD be silently discarded by reacting nodes and the event = SHOULD >>>> be logged. >>>>=20 >>>> It's not just about report type values but unknown values for any = of the AVPs in the OLR. >>>>=20 >>>> This seems like a good requirement to include in the specification = to ensure common behavior in reacting nodes. I don't feel strongly = about this but I would like to hear other opinions. >>>> I think this is still not quite complete. >>>>=20 >>>> If you receive a sub-AVP that you don't understand, then you should = ignore that sub-avp, not the whole OC-OLR AVP. (Unless of course the = unknown AVP has the m-bit set.) If you receive a known sub-AVP, with a = value you don't understand, the behavior should be AVP specific. For = Report-Type, that means ignore the whole OLR. >>>>=20 >>>> It's not clear to me whether the original text was about arbitrary = avps, or Report-Type. >>>>=20 >>>> Steve >>>>=20 >>>> On 12/9/14, 11:04 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: >>>> Hi Steve, >>>>=20 >>>> I think it was pointed out by Ben that we do not specify behaviour = of a node for cases where it detects that another node is breaking the = rule. >>>> The rule is: >>>> A reporting node MUST NOT send overload reports of a type that = has >>>> not been advertised as supported by the reacting node. >>>> See section 4.2.3. >>>>=20 >>>> Regards >>>> Ulrich >>>>=20 >>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Steve = Donovan >>>> Sent: Tuesday, December 09, 2014 2:52 PM >>>> To: dime@ietf.org >>>> Subject: [Dime] Ulrich's suggested change #15 >>>>=20 >>>> Ulrich, >>>>=20 >>>> For your suggested change #15: >>>> Section 4.2.1.3, 4th paragraph: >>>> Existing text: >>>> When receiving an OC-OLR AVPs with unknown values, a reacting = node >>>> SHOULD be silently discarded by reacting nodes and the event = SHOULD >>>> be logged. >>>> Comment: text is confusing. Maybe the intention was to say: >>>> When receiving an OC-OLR AVPs with an unsupported report type = value, a reacting node >>>> SHOULD silently discarded the OC-OLR AVP and the event SHOULD >>>> be logged. >>>> But even that is not correct. >>>> Proposal: Remove the paragraph. >>>> The intent was that an OC-OLR that contains unknown values should = be discarded. I agree that the wording needs to be changes as you = suggested. I don't agree with removing the paragraph. Can you = elaborate on why you think it is not correct when changed as you = suggested? >>>>=20 >>>> Regards, >>>>=20 >>>> Steve >>>>=20 >>>> _______________________________________________ >>>> DiME mailing list >>>> DiME@ietf.org >>>> https://www.ietf.org/mailman/listinfo/dime >>>>=20 >>>>=20 >>>>=20 >>>>=20 >> _______________________________________________ >> DiME mailing list >> DiME@ietf.org >> https://www.ietf.org/mailman/listinfo/dime >> _______________________________________________ >> DiME mailing list >> DiME@ietf.org >> https://www.ietf.org/mailman/listinfo/dime >=20 > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime From nobody Wed Jan 14 15:56:27 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AE1DB1AD0B3 for ; Wed, 14 Jan 2015 15:56:26 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.91 X-Spam-Level: X-Spam-Status: No, score=-1.91 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ze0hrwSBJu5w for ; Wed, 14 Jan 2015 15:56:24 -0800 (PST) Received: from nostrum.com (raven-v6.nostrum.com [IPv6:2001:470:d:1130::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 16C6B1AD0A2 for ; Wed, 14 Jan 2015 15:56:24 -0800 (PST) Received: from [10.0.1.23] (cpe-173-172-146-58.tx.res.rr.com [173.172.146.58]) (authenticated bits=0) by nostrum.com (8.14.9/8.14.7) with ESMTP id t0ENuMXn032099 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 14 Jan 2015 17:56:23 -0600 (CST) (envelope-from ben@nostrum.com) X-Authentication-Warning: raven.nostrum.com: Host cpe-173-172-146-58.tx.res.rr.com [173.172.146.58] claimed to be [10.0.1.23] Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) From: Ben Campbell In-Reply-To: <54B5399D.3020600@gmail.com> Date: Wed, 14 Jan 2015 17:56:22 -0600 X-Mao-Original-Outgoing-Id: 442972582.732917-9873ab2b29fb0b3ab6e293c2b7f2bbc0 Content-Transfer-Encoding: quoted-printable Message-Id: References: <54B5399D.3020600@gmail.com> To: "dime@ietf.org" X-Mailer: Apple Mail (2.1993) Archived-At: Cc: draft-ietf-dime-ovli@tools.ietf.org Subject: Re: [Dime] WLGC #2 for draft-ietf-dime-ovli-06 X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Jan 2015 23:56:26 -0000 I think this version is in much better shape, and almost ready to ship. = But I still have a few comments: Substantive: --Definitions: I think we've made it too easy for the reader to confuse "abatement = mechanisms" with "abatement algorithms". For example, "Abatement = Algorithm" starts with "An extensible mechanism..." and "Diversion" = starts with "An overload abatement mechanism...". A new reader will = likely think that Diversion is a kind of abatement algorithm. I propose = the following the following for "Abatement Algorithm": "An extensible _method_ requested by reporting nodes and used by = reacting nodes to determine which requests receive abatement treatment" For "Diversion": "An abatement _treatment_ mechanism, where..." And for "Throttling": "An abatement treatment mechanism that limits..." -- 4.3, third paragraph from end: This still assumes that reporting nodes cannot change algorithms during = overload. I thought we agreed to remove that. (The normative text is = also still there--see later comment.) -- section 5.2.1, and subsections: We still have some awkward use of SHOULDs and MAYs that I think are = there to indicate that nodes don't really have to structure their = internal state any particular way. But as written, it can be interpreted = to allow them to ignore critical pieces of info. We would be better = either removing the normative language entirely, or preface the section = to say that these represent logical information, and that we do not = assume any particular physical structure. (I prefer the latter at this = point.) Details: -- 5.2.1.1: "A reacting node SHOULD maintain...", "The host-type and = realm-type OCS entries MAY include..." What if it doesn't? I think things fail.=20 Also, I'm still confused by the first part of this section. The reacting = node keeps state for every reported and active overload condition. Each = will be the result of a realm report or a host report. The text makes it = sound like it needs to keep OCS for both report types, even if it had = not received both. -- 5.2.1.1: "A reporting node SHOULD maintain OCS entries..." and "An = OCS entry is identified ... and MAY include ..." What if it doesn't? -- 5.2.1.4: "A reporting node MUST NOT update the abatement algorithm in = an active OCS entry." I thought we agreed to remove that, and replace it with the note at the = beginning of 5.1? -- 5.2.2: 5th paragraph: This doesn't seem quite right, since it leaves the option of no = abatement at all. Second, it doesn't seem to allow delegation of = abatement downstream. When might one choose to ignore those SHOULDs? Is = this here to allow delegation? If so, the use of SHOULD makes local = throttling preferred over delegation. -- 5.3, 4th paragraph: As I mentioned in previous discussion, after re-reading the related text = in 6733, it's no longer clear to me this works like we thought it did. = That is, I think any attempt to make sub-AVPs mandatory risks causing = errors in the enclosing Diameter transaction. I don't know how to solve = this, other just disallowing mandatory sub-AVPs. (Jouni previously = convinced me 6733 treatment of the m-bit in sub-avps worked like we = wanted--perhaps he can re-convince me :-) =20 -- 6.3, paragraph 2: This is stronger than the SHOULDs in the general behavior section = (5.2.2) Paragraph 5:=20 Is this redundant to the last paragraph of 5.2.2? -- 8, 1st paragraph: This is just for agents and servers, not clients, right? If so, "When a = DOIC node..." is too broadly stated. Editorial: -- section 2, "Diversion" repeated "for". -- section 3: I suggest adding a sentence that the same words that are not in all-caps = are excepted from the 2119 interpretation. (We have a few instances of = lowercase "must", "should", etc. The uglier alternative would be to hunt = down and kill all of them.) -- 4.3, 4th paragraph from end s/ "... applying the overload abatement algorithm..." / "... apply the = overload abatement algorithm..." -- Figure 1: The boxes have caret characters in the top and bottom horizontal lines. = Do those mean something? -- section 5.1.3: The first two paragraphs conflict with paragraph 4. I think paragraph 4 = is correct. -- 6.3, 4th paragraph: This seems like a restatement of paragraph 2. > On Jan 13, 2015, at 9:28 AM, Jouni Korhonen = wrote: >=20 > Folks, >=20 > Thanks for the hard work on the -06 revision. Since the changes > from -05 to -06 were many, chairs decided to run another short > WGLC for the WG to verify all changes and discussions are > implemented correctly. >=20 > This email starts a one week WGLC #2 for draft-ietf-dime-ovli-06. The > WGLC ends 20th Jan 2015 EOB (PST). Post your review comments and > concerns to the mailinglist. Also make use of the issue tracker > (remember to select "severity" as "in WG last call"). >=20 > Lionel & Jouni >=20 > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime From nobody Thu Jan 15 00:45:01 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D74C11AD1EE for ; Thu, 15 Jan 2015 00:44:58 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.209 X-Spam-Level: X-Spam-Status: No, score=-4.209 tagged_above=-999 required=5 tests=[BAYES_50=0.8, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id SmPcQByxsJQp for ; Thu, 15 Jan 2015 00:44:54 -0800 (PST) Received: from smtp-fr.alcatel-lucent.com (fr-hpida-esg-02.alcatel-lucent.com [135.245.210.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A2B9C1A9032 for ; Thu, 15 Jan 2015 00:44:53 -0800 (PST) Received: from fr712usmtp2.zeu.alcatel-lucent.com (unknown [135.239.2.42]) by Websense Email Security Gateway with ESMTPS id ADAF368F94B1E; Thu, 15 Jan 2015 08:44:48 +0000 (GMT) Received: from FR712WXCHHUB03.zeu.alcatel-lucent.com (fr712wxchhub03.zeu.alcatel-lucent.com [135.239.2.74]) by fr712usmtp2.zeu.alcatel-lucent.com (GMO) with ESMTP id t0F8ioP7000503 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 15 Jan 2015 09:44:50 +0100 Received: from FR712WXCHMBA12.zeu.alcatel-lucent.com ([169.254.8.50]) by FR712WXCHHUB03.zeu.alcatel-lucent.com ([135.239.2.74]) with mapi id 14.03.0195.001; Thu, 15 Jan 2015 09:44:50 +0100 From: "TROTTIN, JEAN-JACQUES (JEAN-JACQUES)" To: "Wiehe, Ulrich (NSN - DE/Munich)" Thread-Topic: [Dime] Diameter load control inputs Thread-Index: AdAoRTX1mtXcCV8gROKEYHqQd0nf8gBv2auAAEZezgABMPpVgAAuty8A Date: Thu, 15 Jan 2015 08:44:50 +0000 Message-ID: References: <5BCBA1FC2B7F0B4C9D935572D90006681523EF2A@DEMUMBX014.nsn-intra.net> In-Reply-To: <5BCBA1FC2B7F0B4C9D935572D90006681523EF2A@DEMUMBX014.nsn-intra.net> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [135.239.27.41] Content-Type: multipart/alternative; boundary="_000_E194C2E18676714DACA9C3A2516265D2026F5FFAFR712WXCHMBA12z_" MIME-Version: 1.0 Archived-At: Cc: "dime@ietf.org" Subject: Re: [Dime] Diameter load control inputs X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Jan 2015 08:44:59 -0000 --_000_E194C2E18676714DACA9C3A2516265D2026F5FFAFR712WXCHMBA12z_ Content-Type: 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dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A364F1B2BC7 for ; Thu, 15 Jan 2015 01:57:54 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.9 X-Spam-Level: X-Spam-Status: No, score=-6.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VUDJ07bJoFAF for ; Thu, 15 Jan 2015 01:57:50 -0800 (PST) Received: from demumfd001.nsn-inter.net (demumfd001.nsn-inter.net [93.183.12.32]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 29BA31B2BC3 for ; Thu, 15 Jan 2015 01:57:50 -0800 (PST) Received: from demuprx016.emea.nsn-intra.net ([10.150.129.55]) by demumfd001.nsn-inter.net (8.14.3/8.14.3) with ESMTP id t0F9vlXV029312 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 15 Jan 2015 09:57:47 GMT Received: from DEMUHTC003.nsn-intra.net ([10.159.42.34]) by demuprx016.emea.nsn-intra.net (8.12.11.20060308/8.12.11) with ESMTP id t0F9vkL6023499 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 15 Jan 2015 10:57:47 +0100 Received: from DEMUHTC010.nsn-intra.net (10.159.42.41) by DEMUHTC003.nsn-intra.net (10.159.42.34) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 15 Jan 2015 10:57:46 +0100 Received: from DEMUMBX014.nsn-intra.net ([169.254.14.60]) by DEMUHTC010.nsn-intra.net ([10.159.42.41]) with mapi id 14.03.0195.001; Thu, 15 Jan 2015 10:57:46 +0100 From: "Wiehe, Ulrich (NSN - DE/Munich)" To: ext Ben Campbell , "dime@ietf.org" Thread-Topic: Ben's suggested change on Definitions Thread-Index: AdAwqbXvDFIcdrR2SZSsFALH28dWww== Date: Thu, 15 Jan 2015 09:57:45 +0000 Message-ID: <5BCBA1FC2B7F0B4C9D935572D90006681523F070@DEMUMBX014.nsn-intra.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.159.42.109] Content-Type: multipart/alternative; boundary="_000_5BCBA1FC2B7F0B4C9D935572D90006681523F070DEMUMBX014nsnin_" MIME-Version: 1.0 X-purgate-type: clean X-purgate-Ad: Categorized by eleven eXpurgate (R) http://www.eleven.de X-purgate: clean X-purgate: This mail is considered clean (visit http://www.eleven.de for further information) X-purgate-size: 3955 X-purgate-ID: 151667::1421315868-00007286-4BDCFC01/0/0 Archived-At: Cc: "draft-ietf-dime-ovli@tools.ietf.org" Subject: [Dime] Ben's suggested change on Definitions X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Jan 2015 09:57:54 -0000 --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F070DEMUMBX014nsnin_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Ben wrote: --Definitions: I think we've made it too easy for the reader to confuse "abatement mechani= sms" with "abatement algorithms". For example, "Abatement Algorithm" starts= with "An extensible mechanism..." and "Diversion" starts with "An overload= abatement mechanism...". A new reader will likely think that Diversion is = a kind of abatement algorithm. I propose the following the following for "A= batement Algorithm": "An extensible _method_ requested by reporting nodes and used by reacting n= odes to determine which requests receive abatement treatment" For "Diversion": "An abatement _treatment_ mechanism, where..." And for "Throttling": "An abatement treatment mechanism that limits..." I agree with the principle. On reflection, isn't it so that "Abate= ment Algorithm is a method (not necessarily an _extensible_ method - what = is extensible is the set of advertized abatement algorithms) advertized by= reacting nodes and selected by reporting nodes for use at reacting nodes t= o determine whether a given requests (which matches application id and req= uest type and destination) is subject to abatement treatment? --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F070DEMUMBX014nsnin_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Ben wrote:
--Definitions:
 
I think we've made it too easy for the reader to confuse "abateme= nt mechanisms" with "abatement algorithms". For example, &qu= ot;Abatement Algorithm" starts with "An extensible mechanism...&q= uot; and "Diversion" starts with "An overload abatement mech= anism...". A new reader will likely think that Diversion is a kind of abatement algorith= m. I propose the following the following for "Abatement Algorithm"= ;:
 
"An extensible _method_ requested by reporting nodes and used by = reacting nodes to determine which requests receive abatement treatment"= ;
 
For "Diversion":
 
"An abatement _treatment_ mechanism, where..."
 
And for "Throttling":
 
"An abatement treatment mechanism that limits..."
&nbs= p;
<= Ulrich> I agree with the principle. On reflection, isn’t it so tha= t “Abatement Algorithm  is a method (not necessarily an _exte= nsible_ method – what is extensible is the set of advertized abatement algorithms)  advertized by reacting nodes and selected by re= porting nodes for use at reacting nodes to determine whether a given  = requests (which matches application id and request type and destination) is= subject to abatement treatment?
&nbs= p;
&nbs= p;
 --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F070DEMUMBX014nsnin_-- From nobody Thu Jan 15 01:58:15 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9F0781B2BC8 for ; Thu, 15 Jan 2015 01:58:12 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.9 X-Spam-Level: X-Spam-Status: No, score=-6.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vUan2AIZ8_K6 for ; Thu, 15 Jan 2015 01:58:11 -0800 (PST) Received: from demumfd001.nsn-inter.net (demumfd001.nsn-inter.net [93.183.12.32]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 509251B2BCE for ; Thu, 15 Jan 2015 01:58:10 -0800 (PST) Received: from demuprx017.emea.nsn-intra.net ([10.150.129.56]) by demumfd001.nsn-inter.net (8.14.3/8.14.3) with ESMTP id t0F9w8rv030104 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 15 Jan 2015 09:58:08 GMT Received: from DEMUHTC001.nsn-intra.net ([10.159.42.32]) by demuprx017.emea.nsn-intra.net (8.12.11.20060308/8.12.11) with ESMTP id t0F9w8SY001130 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 15 Jan 2015 10:58:08 +0100 Received: from DEMUHTC008.nsn-intra.net (10.159.42.39) by DEMUHTC001.nsn-intra.net (10.159.42.32) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 15 Jan 2015 10:58:07 +0100 Received: from DEMUMBX014.nsn-intra.net ([169.254.14.60]) by DEMUHTC008.nsn-intra.net ([10.159.42.39]) with mapi id 14.03.0195.001; Thu, 15 Jan 2015 10:58:07 +0100 From: "Wiehe, Ulrich (NSN - DE/Munich)" To: ext Ben Campbell , "dime@ietf.org" Thread-Topic: Ben's comments on 4.3, third paragraph from end Thread-Index: AdAwqcKKpO0LYTRKTfCB6qzRIWwNRQ== Date: Thu, 15 Jan 2015 09:58:06 +0000 Message-ID: <5BCBA1FC2B7F0B4C9D935572D90006681523F07F@DEMUMBX014.nsn-intra.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.159.42.109] Content-Type: multipart/alternative; boundary="_000_5BCBA1FC2B7F0B4C9D935572D90006681523F07FDEMUMBX014nsnin_" MIME-Version: 1.0 X-purgate-type: clean X-purgate-Ad: Categorized by eleven eXpurgate (R) http://www.eleven.de X-purgate: clean X-purgate: This mail is considered clean (visit http://www.eleven.de for further information) X-purgate-size: 2950 X-purgate-ID: 151667::1421315888-00007286-39DB422F/0/0 Archived-At: Cc: "draft-ietf-dime-ovli@tools.ietf.org" Subject: [Dime] Ben's comments on 4.3, third paragraph from end X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Jan 2015 09:58:12 -0000 --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F07FDEMUMBX014nsnin_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Ben wrote: -- 4.3, third paragraph from end: This still assumes that reporting nodes cannot change algorithms during ove= rload. I thought we agreed to remove that. (The normative text is also stil= l there--see later comment.) I don't understand. In my copy of -06 the third paragraph from end= in 4.3 reads: Two types of overload abatement treatment are defined, diversion and throttling. Reacting nodes are responsible for determining which treatment is appropriate for individual requests. How does this text assume that reporting nodes cannot change algorithms dur= ing overload? --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F07FDEMUMBX014nsnin_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Ben wrote:
-- 4.3, third paragraph from end:
 
This still assumes that reporting nodes cannot change algorithms durin= g overload. I thought we agreed to remove that. (The normative text is also= still there--see later comment.)
&nbs= p;
<= Ulrich> I don’t understand. In my copy of -06 the third paragraph = from end in 4.3 reads:
=    Two types of overload abatement treatment are defined, diversi= on and
=    throttling.  Reacting nodes are responsible for determini= ng which
=    treatment is appropriate for individual requests.
How = does this text assume that reporting nodes cannot change algorithms during = overload?
&nbs= p;
&nbs= p;
 --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F07FDEMUMBX014nsnin_-- From nobody Thu Jan 15 01:58:50 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 461ED1B2BC3 for ; Thu, 15 Jan 2015 01:58:47 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.9 X-Spam-Level: X-Spam-Status: No, score=-6.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id aWr-7yRaIc1Y for ; Thu, 15 Jan 2015 01:58:45 -0800 (PST) Received: from demumfd001.nsn-inter.net (demumfd001.nsn-inter.net [93.183.12.32]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6D4161B2BC2 for ; Thu, 15 Jan 2015 01:58:45 -0800 (PST) Received: from demuprx016.emea.nsn-intra.net ([10.150.129.55]) by demumfd001.nsn-inter.net (8.14.3/8.14.3) with ESMTP id t0F9whdH031997 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 15 Jan 2015 09:58:43 GMT Received: from DEMUHTC003.nsn-intra.net ([10.159.42.34]) by demuprx016.emea.nsn-intra.net (8.12.11.20060308/8.12.11) with ESMTP id t0F9wgdx024721 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 15 Jan 2015 10:58:43 +0100 Received: from DEMUMBX014.nsn-intra.net ([169.254.14.60]) by DEMUHTC003.nsn-intra.net ([10.159.42.34]) with mapi id 14.03.0195.001; Thu, 15 Jan 2015 10:58:43 +0100 From: "Wiehe, Ulrich (NSN - DE/Munich)" To: ext Ben Campbell , "dime@ietf.org" Thread-Topic: Ben's suggested change on 5.2.1 Thread-Index: AdAwqdfKWdMyH3rMSwGZiZcpGNXcmg== Date: Thu, 15 Jan 2015 09:58:42 +0000 Message-ID: <5BCBA1FC2B7F0B4C9D935572D90006681523F097@DEMUMBX014.nsn-intra.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.159.42.109] Content-Type: multipart/alternative; boundary="_000_5BCBA1FC2B7F0B4C9D935572D90006681523F097DEMUMBX014nsnin_" MIME-Version: 1.0 X-purgate-type: clean X-purgate-Ad: Categorized by eleven eXpurgate (R) http://www.eleven.de X-purgate: clean X-purgate: This mail is considered clean (visit http://www.eleven.de for further information) X-purgate-size: 4949 X-purgate-ID: 151667::1421315923-00007286-B33E64C5/0/0 Archived-At: Cc: "draft-ietf-dime-ovli@tools.ietf.org" Subject: [Dime] Ben's suggested change on 5.2.1 X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Jan 2015 09:58:47 -0000 --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F097DEMUMBX014nsnin_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Ben wrote: -- section 5.2.1, and subsections: We still have some awkward use of SHOULDs and MAYs that I think are there t= o indicate that nodes don't really have to structure their internal state a= ny particular way. But as written, it can be interpreted to allow them to i= gnore critical pieces of info. We would be better either removing the norma= tive language entirely, or preface the section to say that these represent = logical information, and that we do not assume any particular physical stru= cture. (I prefer the latter at this point.) Details: -- 5.2.1.1: "A reacting node SHOULD maintain...", "The host-type and realm-= type OCS entries MAY include..." What if it doesn't? I think things fail. Also, I'm still confused by the first part of this section. The reacting no= de keeps state for every reported and active overload condition. Each will = be the result of a realm report or a host report. The text makes it sound l= ike it needs to keep OCS for both report types, even if it had not received= both. At the reacting node, when there is no overload, e.g. a previous O= LR expired or end of overload has been explicitly signalled, it is up to im= plementations whether to store an OCS containing "no overload" or whether "= no overload" is internally indicated by absence of an OCS. -- 5.2.1.1: "A reporting node SHOULD maintain OCS entries..." and "An OCS e= ntry is identified ... and MAY include ..." What if it doesn't? -- 5.2.1.4: "A reporting node MUST NOT update the abatement algorithm in an= active OCS entry." I thought we agreed to remove that, and replace it with the note at the beg= inning of 5.1? --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F097DEMUMBX014nsnin_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Ben wrote:
-- section 5.2.1, and subsections:
 
We still have some awkward use of SHOULDs and MAYs that I think are th= ere to indicate that nodes don't really have to structure their internal st= ate any particular way. But as written, it can be interpreted to allow them= to ignore critical pieces of info. We would be better either removing the normative language entirely, or pref= ace the section to say that these represent logical information, and that w= e do not assume any particular physical structure. (I prefer the latter at = this point.) Details:
 
-- 5.2.1.1: "A reacting node SHOULD maintain...", "The = host-type and realm-type OCS entries MAY include..."
 
What if it doesn't? I think things fail.
 
Also, I'm still confused by the first part of this section. The reacti= ng node keeps state for every reported and active overload condition. Each = will be the result of a realm report or a host report. The text makes it so= und like it needs to keep OCS for both report types, even if it had not received both.
 
<= Ulrich> At the reacting node, when there is no overload, e.g. a previous= OLR expired or end of overload has been explicitly signalled, it is up to = implementations whether to store an OCS containing “no overload” or whether “no overload” is internall= y indicated by absence of an OCS.
 
-- 5.2.1.1: "A reporting node SHOULD maintain OCS entries..."= ; and "An OCS entry is identified ... and MAY include ..."
 
What if it doesn't?
 
-- 5.2.1.4: "A reporting node MUST NOT update the abatement algor= ithm in an active OCS entry."
 
I thought we agreed to remove that, and replace it with the note at th= e beginning of 5.1?
&nbs= p;
&nbs= p;
&nbs= p;
 --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F097DEMUMBX014nsnin_-- From nobody Thu Jan 15 01:59:18 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CDE9E1B2BBB for ; Thu, 15 Jan 2015 01:59:15 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.9 X-Spam-Level: X-Spam-Status: No, score=-6.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QgTPzxAKyKEK for ; Thu, 15 Jan 2015 01:59:14 -0800 (PST) Received: from demumfd001.nsn-inter.net (demumfd001.nsn-inter.net [93.183.12.32]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D6DEE1B2BC2 for ; Thu, 15 Jan 2015 01:59:13 -0800 (PST) Received: from demuprx016.emea.nsn-intra.net ([10.150.129.55]) by demumfd001.nsn-inter.net (8.14.3/8.14.3) with ESMTP id t0F9xCvX000714 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 15 Jan 2015 09:59:12 GMT Received: from DEMUHTC002.nsn-intra.net ([10.159.42.33]) by demuprx016.emea.nsn-intra.net (8.12.11.20060308/8.12.11) with ESMTP id t0F9xCwo030137 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 15 Jan 2015 10:59:12 +0100 Received: from DEMUHTC012.nsn-intra.net (10.159.42.43) by DEMUHTC002.nsn-intra.net (10.159.42.33) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 15 Jan 2015 10:59:11 +0100 Received: from DEMUMBX014.nsn-intra.net ([169.254.14.60]) by DEMUHTC012.nsn-intra.net ([10.159.42.43]) with mapi id 14.03.0195.001; Thu, 15 Jan 2015 10:59:11 +0100 From: "Wiehe, Ulrich (NSN - DE/Munich)" To: ext Ben Campbell , "dime@ietf.org" Thread-Topic: Ben's comments on 5.2.2: 5th paragraph Thread-Index: AdAwqehaWtrP3vnmTBC01HcLvLd+1Q== Date: Thu, 15 Jan 2015 09:59:10 +0000 Message-ID: <5BCBA1FC2B7F0B4C9D935572D90006681523F0AA@DEMUMBX014.nsn-intra.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.159.42.109] Content-Type: multipart/alternative; boundary="_000_5BCBA1FC2B7F0B4C9D935572D90006681523F0AADEMUMBX014nsnin_" MIME-Version: 1.0 X-purgate-type: clean X-purgate-Ad: Categorized by eleven eXpurgate (R) http://www.eleven.de X-purgate: clean X-purgate: This mail is considered clean (visit http://www.eleven.de for further information) X-purgate-size: 3166 X-purgate-ID: 151667::1421315952-00007286-D207DF6B/0/0 Archived-At: Cc: "draft-ietf-dime-ovli@tools.ietf.org" Subject: [Dime] Ben's comments on 5.2.2: 5th paragraph X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Jan 2015 09:59:16 -0000 --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F0AADEMUMBX014nsnin_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Ben wrote: -- 5.2.2: 5th paragraph: This doesn't seem quite right, since it leaves the option of no abatement a= t all. Second, it doesn't seem to allow delegation of abatement downstream.= When might one choose to ignore those SHOULDs? Is this here to allow deleg= ation? If so, the use of SHOULD makes local throttling preferred over deleg= ation. My understanding is: If delegation of abatement is done by a node,= then that node is no longer a reacting node. The first SHOULD is ignored by reacting nodes that do not support diversion= and hence always perform throttling. For the second SHOULD you MAY be righ= t. We SHOULD replace it with MUST. In addition the world "otherwise" must not be read as " if diversion abatem= ent treatment is not possible" but as " if diversion abatement treatment is= not possible and if the first SHOULD is ignored". --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F0AADEMUMBX014nsnin_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Ben wrote:
-- 5.2.2: 5th paragraph:
 
This doesn't seem quite right, since it leaves the option of no abatem= ent at all. Second, it doesn't seem to allow delegation of abatement downst= ream. When might one choose to ignore those SHOULDs? Is this here to allow = delegation? If so, the use of SHOULD makes local throttling preferred over delegation.
&nbs= p;
<= Ulrich> My understanding is: If delegation of abatement is done by a nod= e, then that node is no longer a reacting node.
The = first SHOULD is ignored by reacting nodes that do not support diversion and= hence always perform throttling. For the second SHOULD you MAY be right. W= e SHOULD replace it with MUST.
In a= ddition the world “otherwise” must not be read as “ if di= version abatement treatment is not possible” but as “ if divers= ion abatement treatment is not possible and if the first SHOULD is ignored&= #8221;.
&nbs= p;
 --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F0AADEMUMBX014nsnin_-- From nobody Thu Jan 15 01:59:35 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4E7DD1B2BC4 for ; Thu, 15 Jan 2015 01:59:33 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.9 X-Spam-Level: X-Spam-Status: No, score=-6.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ylh3TOY7t19Z for ; Thu, 15 Jan 2015 01:59:32 -0800 (PST) Received: from demumfd002.nsn-inter.net (demumfd002.nsn-inter.net [93.183.12.31]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id AD6A11B2BBB for ; Thu, 15 Jan 2015 01:59:31 -0800 (PST) Received: from demuprx016.emea.nsn-intra.net ([10.150.129.55]) by demumfd002.nsn-inter.net (8.14.3/8.14.3) with ESMTP id t0F9xTq9013454 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 15 Jan 2015 09:59:29 GMT Received: from DEMUHTC003.nsn-intra.net ([10.159.42.34]) by demuprx016.emea.nsn-intra.net (8.12.11.20060308/8.12.11) with ESMTP id t0F9xTF7000862 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 15 Jan 2015 10:59:29 +0100 Received: from DEMUHTC007.nsn-intra.net (10.159.42.38) by DEMUHTC003.nsn-intra.net (10.159.42.34) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 15 Jan 2015 10:59:29 +0100 Received: from DEMUMBX014.nsn-intra.net ([169.254.14.60]) by DEMUHTC007.nsn-intra.net ([10.159.42.38]) with mapi id 14.03.0195.001; Thu, 15 Jan 2015 10:59:29 +0100 From: "Wiehe, Ulrich (NSN - DE/Munich)" To: ext Ben Campbell , "dime@ietf.org" Thread-Topic: Ben's suggested change on 8, 1st paragraph Thread-Index: AdAwqfMPrbfZFoexR+iEXYI82dJUpw== Date: Thu, 15 Jan 2015 09:59:28 +0000 Message-ID: <5BCBA1FC2B7F0B4C9D935572D90006681523F0BD@DEMUMBX014.nsn-intra.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.159.42.109] Content-Type: multipart/alternative; boundary="_000_5BCBA1FC2B7F0B4C9D935572D90006681523F0BDDEMUMBX014nsnin_" MIME-Version: 1.0 X-purgate-type: clean X-purgate-Ad: Categorized by eleven eXpurgate (R) http://www.eleven.de X-purgate: clean X-purgate: This mail is considered clean (visit http://www.eleven.de for further information) X-purgate-size: 1431 X-purgate-ID: 151667::1421315969-000067C4-9842F3A1/0/0 Archived-At: Cc: "draft-ietf-dime-ovli@tools.ietf.org" Subject: [Dime] Ben's suggested change on 8, 1st paragraph X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Jan 2015 09:59:33 -0000 --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F0BDDEMUMBX014nsnin_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Ben wrote: -- 8, 1st paragraph: This is just for agents and servers, not clients, right? If so, "When a DOI= C node..." is too broadly stated. I agree --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F0BDDEMUMBX014nsnin_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Ben wrote:
-- 8, 1st paragraph:
 
This is just for agents and servers, not clients, right? If so, "= When a DOIC node..." is too broadly stated.
 
<= Ulrich> I agree
&nbs= p;
 --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F0BDDEMUMBX014nsnin_-- From nobody Thu Jan 15 02:09:28 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9F5F11B2BC4 for ; Thu, 15 Jan 2015 02:09:26 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.9 X-Spam-Level: X-Spam-Status: No, score=-6.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id gZrdxNeBXyHZ for ; Thu, 15 Jan 2015 02:09:25 -0800 (PST) Received: from demumfd001.nsn-inter.net (demumfd001.nsn-inter.net [93.183.12.32]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2526A1A86F8 for ; Thu, 15 Jan 2015 02:09:24 -0800 (PST) Received: from demuprx017.emea.nsn-intra.net ([10.150.129.56]) by demumfd001.nsn-inter.net (8.14.3/8.14.3) with ESMTP id t0FA9MxH031086 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 15 Jan 2015 10:09:22 GMT Received: from DEMUHTC004.nsn-intra.net ([10.159.42.35]) by demuprx017.emea.nsn-intra.net (8.12.11.20060308/8.12.11) with ESMTP id t0FA9Mvv023496 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 15 Jan 2015 11:09:22 +0100 Received: from DEMUHTC009.nsn-intra.net (10.159.42.40) by DEMUHTC004.nsn-intra.net (10.159.42.35) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 15 Jan 2015 11:09:22 +0100 Received: from DEMUMBX014.nsn-intra.net ([169.254.14.60]) by DEMUHTC009.nsn-intra.net ([10.159.42.40]) with mapi id 14.03.0195.001; Thu, 15 Jan 2015 11:09:22 +0100 From: "Wiehe, Ulrich (NSN - DE/Munich)" To: ext Ben Campbell , "dime@ietf.org" Thread-Topic: Ben's comment to section 5.1.3 Thread-Index: AdAwq1TwAno67AYPS/u0aec3692gjA== Date: Thu, 15 Jan 2015 10:09:21 +0000 Message-ID: <5BCBA1FC2B7F0B4C9D935572D90006681523F0D9@DEMUMBX014.nsn-intra.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.159.42.109] Content-Type: multipart/alternative; boundary="_000_5BCBA1FC2B7F0B4C9D935572D90006681523F0D9DEMUMBX014nsnin_" MIME-Version: 1.0 X-purgate-type: clean X-purgate-Ad: Categorized by eleven eXpurgate (R) http://www.eleven.de X-purgate: clean X-purgate: This mail is considered clean (visit http://www.eleven.de for further information) X-purgate-size: 1651 X-purgate-ID: 151667::1421316563-00007286-670096B3/0/0 Archived-At: Cc: "draft-ietf-dime-ovli@tools.ietf.org" Subject: [Dime] Ben's comment to section 5.1.3 X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Jan 2015 10:09:26 -0000 --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F0D9DEMUMBX014nsnin_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Ben wrote: -- section 5.1.3: The first two paragraphs conflict with paragraph 4. I think paragraph 4 is = correct. I agree that paragraph 4 is correct. I do not see how the second p= aragraph conflicts with paragraph 4. --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F0D9DEMUMBX014nsnin_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Ben wrote:
-- section 5.1.3:
 
The first two paragraphs conflict with paragraph 4. I think paragraph = 4 is correct.
&nbs= p;
<= Ulrich> I agree that paragraph 4 is correct. I do not see how the second= paragraph conflicts with paragraph 4. 
&nbs= p;
 --_000_5BCBA1FC2B7F0B4C9D935572D90006681523F0D9DEMUMBX014nsnin_-- From nobody Thu Jan 15 02:57:53 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2E2461B2BD4 for ; Thu, 15 Jan 2015 02:57:51 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.51 X-Spam-Level: X-Spam-Status: No, score=-14.51 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id izYEHygKSxkM for ; Thu, 15 Jan 2015 02:57:47 -0800 (PST) Received: from bgl-iport-2.cisco.com (bgl-iport-2.cisco.com [72.163.197.26]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6EFF51B2BCF for ; Thu, 15 Jan 2015 02:57:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=15748; q=dns/txt; s=iport; t=1421319466; x=1422529066; h=message-id:date:from:mime-version:to:cc:subject: references:in-reply-to; bh=6ngAGj0WY3EhbmPRI0XV58VROH9SGvwpy6lwOzqvSY8=; b=WRKXlOd5UwOATr9A7yW/kXt2MlVQQIEzq2VkgdYJSdBmS7VmzIhOnvQv /vTrzOV/9m3FzZBcBMCxbWd21g7KM6nqBedzjpcJrhdAimgve93GaNy00 BD219eWeRXk8Vyei4T6HAHecqusQ7CkGbM3nL8w9tdPJK43/Jy2uRu1nx s=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ArkEABect1RIo8UY/2dsb2JhbABBGoNYWIMFwxCFcQKBWQEBAQEBfYQNAQEEI0sKARAJAiEWCAMCAgkDAgECAQ8lEQYBDAEFAgEBBYgPAxENN55qnGqPdg2DdQEBAQEBAQEBAQEBAQEBAQEBAQEBAReMSYEGgT0LEQFQB4JogUEFgUqDbo0fg0CBRIEPgnOCHIYBhWsigg+BYD0xARJ5gTcBAQE X-IronPort-AV: E=Sophos; i="5.09,403,1418083200"; d="scan'208,217"; a="49317208" Received: from vla196-nat.cisco.com (HELO bgl-core-2.cisco.com) ([72.163.197.24]) by bgl-iport-2.cisco.com with ESMTP; 15 Jan 2015 10:57:42 +0000 Received: from [10.60.67.85] (ams-bclaise-8914.cisco.com [10.60.67.85]) by bgl-core-2.cisco.com (8.14.5/8.14.5) with ESMTP id t0FAvdOw018928; Thu, 15 Jan 2015 10:57:40 GMT Message-ID: <54B79D23.1080104@cisco.com> Date: Thu, 15 Jan 2015 11:57:39 +0100 From: Benoit Claise User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.7.0 MIME-Version: 1.0 To: lionel.morand@orange.com, "vf0213@gmail.com" , "jari.arkko@ericsson.com" , "john.loughney@nokia.com" , "glenzorn@gmail.com" , "joelja@bogus.com" , "jouni.nospam@gmail.com" References: <20141226060357.493B018008C@rfc-editor.org> <54B64E2E.1080908@cisco.com> <22101_1421248827_54B6893B_22101_5524_1_6B7134B31289DC4FAF731D844122B36EB0A6AB@PEXCVZYM13.corporate.adroot.infra.ftgroup> In-Reply-To: <22101_1421248827_54B6893B_22101_5524_1_6B7134B31289DC4FAF731D844122B36EB0A6AB@PEXCVZYM13.corporate.adroot.infra.ftgroup> Content-Type: multipart/alternative; boundary="------------080809010108090209080106" Archived-At: Cc: "dime@ietf.org" , "Hans.Liu@alcatel-lucent.com" Subject: Re: [Dime] [Technical Errata Reported] RFC6733 (4209) X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Jan 2015 10:57:51 -0000 This is a multi-part message in MIME format. --------------080809010108090209080106 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Dear all, Thanks Lionel for this explanation. Based on the above, I'm inclined to classify this errata as Rejected. I plan to do so in a week from now, allowing some more time for potential discussions. +1 to Lionel when he wrote: Finally, if it is an attempt to clarify/modify the behavior of the peer receiving DPR with the "BUSY" cause, I don't think that using errata would be the most appropriate way. From http://www.rfc-editor.org/status_type_desc.html, the Rejected meaning is: "The erratum is in error, or proposes a change to the RFC that should be done by publishing a new RFC that replaces the current RFC. In the latter case, if the change is to be considered for future updates of the document, it should be proposed using channels other than the errata process, such as a WG mailing list." - IESG statement on "IESG Processing of RFC Errata for the IETF Stream" Regards, Benoit > Here is my view on this erratum: > > The text describing the "BUSY" and "DO_NOT_WANT_TO_TALK_TO_YOU" cases is consistent with the text found in the introduction of the section 5.4. > > "In the event that the > disconnect was a result of either a shortage of internal resources or > simply that the node in question has no intentions of forwarding any > Diameter messages to the peer in the foreseeable future, a periodic > connection request would not be welcomed. The Disconnection-Reason > AVP contains the reason the Diameter node issued the Disconnect-Peer- > Request message. > > The Disconnect-Peer-Request message is used by a Diameter node to > inform its peer of its intent to disconnect the transport layer and > that the peer shouldn't reconnect unless it has a valid reason to do > so (e.g., message to be forwarded). " > > So the main purpose for sending a DPR with the causes "BUSY" and "DO_NOT_WANT_TO_TALK_TO_YOU" is actually to avoid the periodic reconnection attempts governed by the Tc timer. > These exceptions are mentioned in the section 2.1: > > "When no transport connection exists with a peer, an attempt to > connect SHOULD be made periodically. This behavior is handled via > the Tc timer (see Section 12 for details), whose recommended value is > 30 seconds. There are certain exceptions to this rule, such as when > a peer has terminated the transport connection stating that it does > not wish to communicate." > > Now, it is true that there is no clear guideline on how to behave when receiving the cause "BUSY" and this explains why some implementations in the field still attempt to re-open the connection, as after a normal transport failure detection. But it does not mean that the text in the RFC6733 is wrong. > > Finally, if it is an attempt to clarify/modify the behavior of the peer receiving DPR with the "BUSY" cause, I don't think that using errata would be the most appropriate way. > > Let see if there are other views on this issue. > > Regards, > > Lionel > > -----Message d'origine----- > De : Benoit Claise [mailto:bclaise@cisco.com] > Envoyé : mercredi 14 janvier 2015 12:09 > À : vf0213@gmail.com; jari.arkko@ericsson.com; john.loughney@nokia.com; glenzorn@gmail.com; joelja@bogus.com; jouni.nospam@gmail.com; MORAND Lionel IMT/OLN > Cc : Hans.Liu@alcatel-lucent.com; dime@ietf.org > Objet : Re: [Technical Errata Reported] RFC6733 (4209) > > Document authors, DIME participants, > > Can we please have a discussion on this errata validity. > > Regards, Benoit >> The following errata report has been submitted for RFC6733, "Diameter >> Base Protocol". >> >> -------------------------------------- >> You may review the report below and at: >> http://www.rfc-editor.org/errata_search.php?rfc=6733&eid=4209 >> >> -------------------------------------- >> Type: Technical >> Reported by: Hans Liu >> >> Section: 5.4.3 >> >> Original Text >> ------------- >> BUSY 1 >> The peer’s internal resources are constrained, and it has >> determined that the transport connection needs to be closed. >> A receiver of a DPR with above result code SHOULD NOT attempt >> reconnection. >> >> Corrected Text >> -------------- >> BUSY 1 >> The peer’s internal resources are constrained, and it has >> determined that the transport connection needs to be closed. >> A receiver of a DPR with above result code SHOULD either >> connect to an alternate node, or attempt reconnection >> after a time period. >> >> Notes >> ----- >> In most implementations, the Diameter node will continue to serve its peer after the resources recover and expect reconnection. If the Diameter node won't like reconnection from peer, DO_NOT_WANT_TO_TALK_TO_YOU can be used instead of BUSY. >> >> Instructions: >> ------------- >> This erratum is currently posted as "Reported". If necessary, please >> use "Reply All" to discuss whether it should be verified or rejected. >> When a decision is reached, the verifying party (IESG) can log in to >> change the status and edit the report, if necessary. >> >> -------------------------------------- >> RFC6733 (draft-ietf-dime-rfc3588bis-33) >> -------------------------------------- >> Title : Diameter Base Protocol >> Publication Date : October 2012 >> Author(s) : V. Fajardo, Ed., J. Arkko, J. Loughney, G. Zorn, Ed. >> Category : PROPOSED STANDARD >> Source : Diameter Maintenance and Extensions >> Area : Operations and Management >> Stream : IETF >> Verifying Party : IESG >> >> . >> > > _________________________________________________________________________________________________________________________ > > Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc > pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler > a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration, > Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. > > This message and its attachments may contain confidential or privileged information that may be protected by law; > they should not be distributed, used or copied without authorisation. > If you have received this email in error, please notify the sender and delete this message and its attachments. > As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified. > Thank you. > --------------080809010108090209080106 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit
Dear all,

Thanks Lionel for this explanation.
Based on the above, I'm inclined to classify this errata as Rejected. I plan to do so in a week from now, allowing some more time for potential discussions.

+1 to Lionel when he wrote:
Finally, if it is an attempt to clarify/modify the behavior of the peer receiving DPR with the "BUSY" cause, I don't think that using errata would be the most appropriate way.
From http://www.rfc-editor.org/status_type_desc.html, the Rejected meaning is:
"The erratum is in error, or proposes a change to the RFC that should be done by publishing a new RFC that replaces the current RFC. In the latter case, if the change is to be considered for future updates of the document, it should be proposed using channels other than the errata process, such as a WG mailing list." - IESG statement on "IESG Processing of RFC Errata for the IETF Stream"
Regards, Benoit
Here is my view on this erratum:

The text describing the "BUSY" and "DO_NOT_WANT_TO_TALK_TO_YOU" cases is consistent with the text found in the introduction of the section 5.4.

  "In the event that the
   disconnect was a result of either a shortage of internal resources or
   simply that the node in question has no intentions of forwarding any
   Diameter messages to the peer in the foreseeable future, a periodic
   connection request would not be welcomed.  The Disconnection-Reason
   AVP contains the reason the Diameter node issued the Disconnect-Peer-
   Request message.

   The Disconnect-Peer-Request message is used by a Diameter node to
   inform its peer of its intent to disconnect the transport layer and
   that the peer shouldn't reconnect unless it has a valid reason to do
   so (e.g., message to be forwarded). " 

So the main purpose for sending a DPR with the causes "BUSY" and "DO_NOT_WANT_TO_TALK_TO_YOU" is actually to avoid the periodic reconnection attempts governed by the Tc timer.
These exceptions are mentioned in the section 2.1:

  "When no transport connection exists with a peer, an attempt to
   connect SHOULD be made periodically.  This behavior is handled via
   the Tc timer (see Section 12 for details), whose recommended value is
   30 seconds.  There are certain exceptions to this rule, such as when
   a peer has terminated the transport connection stating that it does
   not wish to communicate."

Now, it is true that there is no clear guideline on how to behave when receiving the cause "BUSY" and this explains why some implementations in the field still attempt to re-open the connection, as after a normal transport failure detection. But it does not mean that the text in the RFC6733 is wrong.

Finally, if it is an attempt to clarify/modify the behavior of the peer receiving DPR with the "BUSY" cause, I don't think that using errata would be the most appropriate way.

Let see if there are other views on this issue.

Regards,

Lionel 

-----Message d'origine-----
De : Benoit Claise [mailto:bclaise@cisco.com] 
Envoyé : mercredi 14 janvier 2015 12:09
À : vf0213@gmail.com; jari.arkko@ericsson.com; john.loughney@nokia.com; glenzorn@gmail.com; joelja@bogus.com; jouni.nospam@gmail.com; MORAND Lionel IMT/OLN
Cc : Hans.Liu@alcatel-lucent.com; dime@ietf.org
Objet : Re: [Technical Errata Reported] RFC6733 (4209)

Document authors, DIME participants,

Can we please have a discussion on this errata validity.

Regards, Benoit

The following errata report has been submitted for RFC6733, "Diameter 
Base Protocol".

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata_search.php?rfc=6733&eid=4209

--------------------------------------
Type: Technical
Reported by: Hans Liu <Hans.Liu@alcatel-lucent.com>

Section: 5.4.3

Original Text
-------------
       BUSY                              1
          The peer’s internal resources are constrained, and it has
          determined that the transport connection needs to be closed.
          A receiver of a DPR with above result code SHOULD NOT attempt
          reconnection.

Corrected Text
--------------
       BUSY                              1
          The peer’s internal resources are constrained, and it has
          determined that the transport connection needs to be closed.
          A receiver of a DPR with above result code SHOULD either
          connect to an alternate node, or attempt reconnection
          after a time period.

Notes
-----
In most implementations, the Diameter node will continue to serve its peer after the resources recover and expect reconnection. If the Diameter node won't like reconnection from peer, DO_NOT_WANT_TO_TALK_TO_YOU can be used instead of BUSY.

Instructions:
-------------
This erratum is currently posted as "Reported". If necessary, please 
use "Reply All" to discuss whether it should be verified or rejected. 
When a decision is reached, the verifying party (IESG) can log in to 
change the status and edit the report, if necessary.

--------------------------------------
RFC6733 (draft-ietf-dime-rfc3588bis-33)
--------------------------------------
Title               : Diameter Base Protocol
Publication Date    : October 2012
Author(s)           : V. Fajardo, Ed., J. Arkko, J. Loughney, G. Zorn, Ed.
Category            : PROPOSED STANDARD
Source              : Diameter Maintenance and Extensions
Area                : Operations and Management
Stream              : IETF
Verifying Party     : IESG

.



_________________________________________________________________________________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci.

This message and its attachments may contain confidential or privileged information that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and delete this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified.
Thank you.

--------------080809010108090209080106-- From nobody Thu Jan 15 05:12:17 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 43FFB1B2BF2 for ; Thu, 15 Jan 2015 05:12:15 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.12 X-Spam-Level: X-Spam-Status: No, score=-1.12 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, SPF_NEUTRAL=0.779] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id n4MR7smS6a44 for ; Thu, 15 Jan 2015 05:12:14 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0C56B1B2BED for ; Thu, 15 Jan 2015 05:12:14 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:54598 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1YBkDb-0000VR-5S for dime@ietf.org; Thu, 15 Jan 2015 05:12:13 -0800 Message-ID: <54B7BCAA.80907@usdonovans.com> Date: Thu, 15 Jan 2015 07:12:10 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: dime@ietf.org References: <5BCBA1FC2B7F0B4C9D935572D90006681523F070@DEMUMBX014.nsn-intra.net> In-Reply-To: <5BCBA1FC2B7F0B4C9D935572D90006681523F070@DEMUMBX014.nsn-intra.net> Content-Type: multipart/alternative; boundary="------------060706000407040101010401" X-OutGoing-Spam-Status: No, score=-2.9 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - biz131.inmotionhosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - usdonovans.com X-Get-Message-Sender-Via: biz131.inmotionhosting.com: authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: Subject: Re: [Dime] Ben's suggested change on Definitions X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Jan 2015 13:12:15 -0000 This is a multi-part message in MIME format. --------------060706000407040101010401 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit I'm ok with the changes. Steve On 1/15/15 3:57 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: > Ben wrote: > --Definitions: > I think we've made it too easy for the reader to confuse "abatement > mechanisms" with "abatement algorithms". For example, "Abatement > Algorithm" starts with "An extensible mechanism..." and "Diversion" > starts with "An overload abatement mechanism...". A new reader will > likely think that Diversion is a kind of abatement algorithm. I > propose the following the following for "Abatement Algorithm": > "An extensible _method_ requested by reporting nodes and used by > reacting nodes to determine which requests receive abatement treatment" > For "Diversion": > "An abatement _treatment_ mechanism, where..." > And for "Throttling": > "An abatement treatment mechanism that limits..." > I agree with the principle. On reflection, isn’t it so that > “Abatement Algorithm is a method (not necessarily an _/extensible/_ > method – what is extensible is the set of advertized abatement > algorithms) advertized by reacting nodes and selected by reporting > nodes for use at reacting nodes to determine whether a given requests > (which matches application id and request type and destination) is > subject to abatement treatment? > > > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime --------------060706000407040101010401 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit I'm ok with the changes.

Steve

On 1/15/15 3:57 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
Ben wrote:
--Definitions:
 
I think we've made it too easy for the reader to confuse "abatement mechanisms" with "abatement algorithms". For example, "Abatement Algorithm" starts with "An extensible mechanism..." and "Diversion" starts with "An overload abatement mechanism...". A new reader will likely think that Diversion is a kind of abatement algorithm. I propose the following the following for "Abatement Algorithm":
 
"An extensible _method_ requested by reporting nodes and used by reacting nodes to determine which requests receive abatement treatment"
 
For "Diversion":
 
"An abatement _treatment_ mechanism, where..."
 
And for "Throttling":
 
"An abatement treatment mechanism that limits..."
 
<Ulrich> I agree with the principle. On reflection, isn’t it so that “Abatement Algorithm  is a method (not necessarily an _extensible_ method – what is extensible is the set of advertized abatement algorithms)  advertized by reacting nodes and selected by reporting nodes for use at reacting nodes to determine whether a given  requests (which matches application id and request type and destination) is subject to abatement treatment?
 
 
 

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--------------060706000407040101010401-- From nobody Thu Jan 15 05:14:19 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CA4DD1B2BEE for ; Thu, 15 Jan 2015 05:14:17 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.12 X-Spam-Level: X-Spam-Status: No, score=-1.12 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, SPF_NEUTRAL=0.779] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id AucyIIY27G86 for ; Thu, 15 Jan 2015 05:14:16 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id CBF7E1B2BED for ; Thu, 15 Jan 2015 05:14:16 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:54602 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1YBkFZ-00027f-Ci for dime@ietf.org; Thu, 15 Jan 2015 05:14:16 -0800 Message-ID: <54B7BD25.4040103@usdonovans.com> Date: Thu, 15 Jan 2015 07:14:13 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: dime@ietf.org References: <5BCBA1FC2B7F0B4C9D935572D90006681523F07F@DEMUMBX014.nsn-intra.net> In-Reply-To: <5BCBA1FC2B7F0B4C9D935572D90006681523F07F@DEMUMBX014.nsn-intra.net> Content-Type: multipart/alternative; boundary="------------000601060001020402000608" X-OutGoing-Spam-Status: No, score=-2.9 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - biz131.inmotionhosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - usdonovans.com X-Get-Message-Sender-Via: biz131.inmotionhosting.com: authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Jan 2015 13:14:18 -0000 This is a multi-part message in MIME format. --------------000601060001020402000608 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit I agree with Ulrich, I don't see the issue. On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: > Ben wrote: > -- 4.3, third paragraph from end: > This still assumes that reporting nodes cannot change algorithms > during overload. I thought we agreed to remove that. (The normative > text is also still there--see later comment.) > I don’t understand. In my copy of -06 the third paragraph > from end in 4.3 reads: > Two types of overload abatement treatment are defined, diversion and > throttling. Reacting nodes are responsible for determining which > treatment is appropriate for individual requests. > How does this text assume that reporting nodes cannot change > algorithms during overload? > > > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime --------------000601060001020402000608 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit I agree with Ulrich, I don't see the issue.


On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
Ben wrote:
-- 4.3, third paragraph from end:
 
This still assumes that reporting nodes cannot change algorithms during overload. I thought we agreed to remove that. (The normative text is also still there--see later comment.)
 
<Ulrich> I don’t understand. In my copy of -06 the third paragraph from end in 4.3 reads:
   Two types of overload abatement treatment are defined, diversion and
   throttling.  Reacting nodes are responsible for determining which
   treatment is appropriate for individual requests.
How does this text assume that reporting nodes cannot change algorithms during overload?
 
 
 

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--------------000601060001020402000608-- From nobody Thu Jan 15 05:27:58 2015 Return-Path: X-Original-To: dime@ietfa.amsl.com Delivered-To: dime@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B86B21B2BE0 for ; Thu, 15 Jan 2015 05:27:56 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.12 X-Spam-Level: X-Spam-Status: No, score=-1.12 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, SPF_NEUTRAL=0.779] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id S2w0FGWO3cvo for ; Thu, 15 Jan 2015 05:27:55 -0800 (PST) Received: from biz131.inmotionhosting.com (biz131.inmotionhosting.com [173.247.247.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 203C71B2BD7 for ; Thu, 15 Jan 2015 05:27:55 -0800 (PST) Received: from cpe-76-187-100-94.tx.res.rr.com ([76.187.100.94]:54622 helo=Steves-MacBook-Air-2.local) by biz131.inmotionhosting.com with esmtpsa (UNKNOWN:RC4-SHA:128) (Exim 4.82) (envelope-from ) id 1YBkSn-000BFO-39 for dime@ietf.org; Thu, 15 Jan 2015 05:27:54 -0800 Message-ID: <54B7C059.8040806@usdonovans.com> Date: Thu, 15 Jan 2015 07:27:53 -0600 From: Steve Donovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: dime@ietf.org References: <5BCBA1FC2B7F0B4C9D935572D90006681523F097@DEMUMBX014.nsn-intra.net> In-Reply-To: <5BCBA1FC2B7F0B4C9D935572D90006681523F097@DEMUMBX014.nsn-intra.net> Content-Type: multipart/alternative; boundary="------------050303010001040400010206" X-OutGoing-Spam-Status: No, score=-2.9 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - biz131.inmotionhosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - usdonovans.com X-Get-Message-Sender-Via: biz131.inmotionhosting.com: authenticated_id: srd+usdonovans.com/only user confirmed/virtual account not confirmed Archived-At: Subject: Re: [Dime] Ben's suggested change on 5.2.1 X-BeenThere: dime@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Diameter Maintanence and Extentions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Jan 2015 13:27:56 -0000 This is a multi-part message in MIME format. --------------050303010001040400010206 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote: > Ben wrote: > -- section 5.2.1, and subsections: > We still have some awkward use of SHOULDs and MAYs that I think are > there to indicate that nodes don't really have to structure their > internal state any particular way. But as written, it can be > interpreted to allow them to ignore critical pieces of info. We would > be better either removing the normative language entirely, or preface > the section to say that these represent logical information, and that > we do not assume any particular physical structure. (I prefer the > latter at this point.) Details: SRD> How about the following added to section 5.2.1: "The contents of the OCS in the reporting node and in the reacting node represent logical constructs. The actual internal physical structure of the state included in the OCS is an implementation decision." SRD> I'm also ok with removing the normative language. I'll show examples below. > -- 5.2.1.1: "A reacting node SHOULD maintain...", "The host-type and > realm-type OCS entries MAY include..." SRD> Change: A reacting node SHOULD maintain the following OCS per supported Diameter application: to: A reacting node maintains the following OCS per supported Diameter application: Change: The host-type and realm-type OCS entries MAY include the following information (the actual information stored is an implementation decision): to: The host-type and realm-type OCS entries include the following information (the actual information stored is an implementation decision): SRD> And so on. This looks better and I don't think we lose anything. > What if it doesn't? I think things fail. > Also, I'm still confused by the first part of this section. The > reacting node keeps state for every reported and active overload > condition. Each will be the result of a realm report or a host report. > The text makes it sound like it needs to keep OCS for both report > types, even if it had not received both. > At the reacting node, when there is no overload, e.g. a > previous OLR expired or end of overload has been explicitly signalled, > it is up to implementations whether to store an OCS containing “no > overload” or whether “no overload” is internally indicated by absence > of an OCS. SRD> How about changing the first paragraph to the following: A reacting node SHOULD maintain the following OCS per supported received overload report: > -- 5.2.1.1: "A reporting node SHOULD maintain OCS entries..." and "An > OCS entry is identified ... and MAY include ..." > What if it doesn't? SRD> This concern is addressed if we remove the SHOULDs and MAYs. > -- 5.2.1.4: "A reporting node MUST NOT update the abatement algorithm > in an active OCS entry." > I thought we agreed to remove that, and replace it with the note at > the beginning of 5.1? SRD> You are correct, the paragraph was entered but some of the normative statements were missed. There is also a statement in the overview that still says reporting nodes can't change the algorithm during an active overload condition. This will need to be removed as well. > > > _______________________________________________ > DiME mailing list > DiME@ietf.org > https://www.ietf.org/mailman/listinfo/dime --------------050303010001040400010206 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit
On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
Ben wrote:
-- section 5.2.1, and subsections:
 
We still have some awkward use of SHOULDs and MAYs that I think are there to indicate that nodes don't really have to structure their internal state any particular way. But as written, it can be interpreted to allow them to ignore critical pieces of info. We would be better either removing the normative language entirely, or preface the section to say that these represent logical information, and that we do not assume any particular physical structure. (I prefer the latter at this point.) Details:
SRD> How about the following added to section 5.2.1:

"The contents of the OCS in the reporting node and in the reacting node represent logical constructs.  The actual internal physical structure of the state included in the OCS is an implementation decision."

SRD> I'm also ok with removing the normative language.  I'll show examples below.


 
-- 5.2.1.1: "A reacting node SHOULD maintain...", "The host-type and realm-type OCS entries MAY include..."
SRD> Change:
 
A reacting node SHOULD maintain the following OCS per supported
   Diameter application:

to:

A reacting node maintains the following OCS per supported
   Diameter application:

Change:

   The host-type and realm-type OCS entries MAY include the following
   information (the actual information stored is an implementation
   decision):

to:

   The host-type and realm-type OCS entries include the following
   information (the actual information stored is an implementation
   decision):

SRD> And so on.  This looks better and I don't think we lose anything.


    

          
 

          
What if it doesn't? I think things fail. 

          
 

          
Also, I'm still confused by the first part of this
            section. The reacting node keeps state for every reported
            and active overload condition. Each will be the result of a
            realm report or a host report. The text makes it sound like
            it needs to keep OCS for
            both report types, even if it had not received both.

          
 

          
<Ulrich> At the reacting
                node, when there is no overload, e.g. a previous OLR
                expired or end of overload has been explicitly
                signalled, it is up to implementations whether to store
                an OCS containing
                “no overload” or whether “no overload” is internally
                indicated by absence of an OCS. 

        

    SRD> How about
            changing the first paragraph to the following:

    
    
   A reacting node SHOULD maintain the following OCS per supported
   received overload report:


    

          
 

          
-- 5.2.1.1: "A reporting node SHOULD maintain OCS
            entries..." and "An OCS entry is identified ... and MAY
            include ..."

          
 

          
What if it doesn't?

        

    SRD> This concern
            is addressed if we remove the SHOULDs and MAYs.

    

          
 

          
-- 5.2.1.4: "A reporting node MUST NOT update the
            abatement algorithm in an active OCS entry."

          
 

          
I thought we agreed to remove that, and replace it with
            the note at the beginning of 5.1?

        

    SRD> You are
            correct, the paragraph was entered but some of the normative
            statements were missed.  There is also a statement in the
            overview that still says reporting nodes can't change the
            algorithm during an active overload condition.  This will
            need to be removed as well.

    

          
 

          
 

          
 

        
      

      

      

      
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Subject: Re: [Dime] Ben's comments on 5.2.2: 5th paragraph
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On 1/15/15 3:59 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
> Ben wrote:
> -- 5.2.2: 5th paragraph:
> This doesn't seem quite right, since it leaves the option of no 
> abatement at all. Second, it doesn't seem to allow delegation of 
> abatement downstream. When might one choose to ignore those SHOULDs? 
> Is this here to allow delegation? If so, the use of SHOULD makes local 
> throttling preferred over delegation.
>  My understanding is: If delegation of abatement is done by a 
> node, then that node is no longer a reacting node.
> The first SHOULD is ignored by reacting nodes that do not support 
> diversion and hence always perform throttling. For the second SHOULD 
> you MAY be right. We SHOULD replace it with MUST.
> In addition the world “otherwise” must not be read as “ if diversion 
> abatement treatment is not possible” but as “ if diversion abatement 
> treatment is not possible and if the first SHOULD is ignored”.
SRD>  I mostly agree with Ulrich.  I propose the second sentence be 
changed to:

The reacting node MUST apply throttling abatement treatment to requests
identified for abatement treatment  when diversion treatment
is not possible or was not applied.

>
>
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime


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On 1/15/15 3:59 AM, Wiehe, Ulrich (NSN
      - DE/Munich) wrote:

    

    

      
      
      
      
      
          
Ben wrote:

          
-- 5.2.2: 5th paragraph:

          
 

          
This doesn't seem quite right, since it leaves the option
            of no abatement at all. Second, it doesn't seem to allow
            delegation of abatement downstream. When might one choose to
            ignore those SHOULDs? Is this here to allow delegation? If
            so, the use of SHOULD
            makes local throttling preferred over delegation.

          
 

          
<Ulrich> My understanding
                is: If delegation of abatement is done by a node, then
                that node is no longer a reacting node. 

          
The first SHOULD is ignored by
                reacting nodes that do not support diversion and hence
                always perform throttling. For the second SHOULD you MAY
                be right. We SHOULD replace it with MUST.

          
In addition the world
                “otherwise” must not be read as “ if diversion abatement
                treatment is not possible” but as “ if diversion
                abatement treatment is not possible and if the first
                SHOULD is ignored”.

        

    SRD>  I mostly
            agree with Ulrich.  I propose the second sentence be changed
            to:

    
    
The reacting node MUST apply throttling abatement treatment to requests
identified for abatement treatment  when diversion treatment
is not possible or was not applied.

    

          
 

        
      

      

      

      
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Subject: Re: [Dime] Ben's suggested change on 8, 1st paragraph
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Clients can reject requests sent by servers.  I don't see the issue.

On 1/15/15 3:59 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
> Ben wrote:
> -- 8, 1st paragraph:
> This is just for agents and servers, not clients, right? If so, "When 
> a DOIC node..." is too broadly stated.
>  I agree
>
>
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime


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    Clients can reject requests sent by servers.  I don't see the issue.

    

    
On 1/15/15 3:59 AM, Wiehe, Ulrich (NSN
      - DE/Munich) wrote:

    

    

      
      
      
      
      
          
Ben wrote:

          
-- 8, 1st paragraph:

          
 

          
This is just for agents and servers, not clients, right?
            If so, "When a DOIC node..." is too broadly stated.

          
 

          
<Ulrich> I agree

          
 

        
      

      

      

      
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Subject: Re: [Dime] Ben's comment to section 5.1.3
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On 1/15/15 4:09 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
> Ben wrote:
> -- section 5.1.3:
> The first two paragraphs conflict with paragraph 4. I think paragraph 
> 4 is correct.
>  I agree that paragraph 4 is correct. I do not see how the 
> second paragraph conflicts with paragraph 4.
SRD> I also do not see the conflict.  Paragraph two is talking about 
taking on reacting node behavior and paragraph 4 is about taking on 
reporting node behavior.
>
>
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime


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On 1/15/15 4:09 AM, Wiehe, Ulrich (NSN
      - DE/Munich) wrote:

    

    

      
      
      
      
      
          
Ben wrote:

          
-- section 5.1.3:

          
 

          
The first two paragraphs conflict with paragraph 4. I
            think paragraph 4 is correct.

          
 

          
<Ulrich> I agree that
                paragraph 4 is correct. I do not see how the second
                paragraph conflicts with paragraph 4.  

        

    SRD> I also do not
            see the conflict.  Paragraph two is talking about taking on
            reacting node behavior and paragraph 4 is about taking on
            reporting node behavior.

    

          
 

        
      

      

      

      
_______________________________________________
DiME mailing list
DiME@ietf.org
https://www.ietf.org/mailman/listinfo/dime


    

    

  


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Archived-At: 
Subject: [Dime] Comments on DOIC-06
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All,

Please separate separate issues into separate emails to make it possible 
to follow the discussion of each issue to conclusion.

Thanks,

Steve


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To: Steve Donovan 
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Cc: dime@ietf.org
Subject: Re: [Dime] Ben's comment to section 5.1.3
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Ah, I missed the reacting vs reporting node part. In that case, let me =
adjust my comment to say that I thought we had agreed to reduce the =
SHOULD in paragraph 2 to a MAY, or to make it non normative.

Also, paragraph 1 now seems unnecessary except to set the context for =
the following paragraphs. As such, it should probably not be normative.


> On Jan 15, 2015, at 7:42 AM, Steve Donovan  =
wrote:
>=20
>=20
> On 1/15/15 4:09 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>> Ben wrote:
>> -- section 5.1.3:
>> =20
>> The first two paragraphs conflict with paragraph 4. I think paragraph =
4 is correct.
>> =20
>>  I agree that paragraph 4 is correct. I do not see how the =
second paragraph conflicts with paragraph 4. =20
> SRD> I also do not see the conflict.  Paragraph two is talking about =
taking on reacting node behavior and paragraph 4 is about taking on =
reporting node behavior.
>> =20
>>=20
>>=20
>> _______________________________________________
>> DiME mailing list
>>=20
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
>=20
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime


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To: Steve Donovan 
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Subject: Re: [Dime] Ben's suggested change on 8, 1st paragraph
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Here we have an example of the need for the term "transaction client" =
:-)

On a re-read, the text is technically correct, since it speaks of =
rejecting a Diameter request, vs rejecting some client protocol action. =
But I think puts too subtle a point on it for a reader who hasn't been =
involved in all our discussions. I think it would be helpful to point =
out that this does not apply if the throttling node is the originator of =
the request in the first place.

> On Jan 15, 2015, at 7:40 AM, Steve Donovan  =
wrote:
>=20
> Clients can reject requests sent by servers.  I don't see the issue.
>=20
> On 1/15/15 3:59 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>> Ben wrote:
>> -- 8, 1st paragraph:
>> =20
>> This is just for agents and servers, not clients, right? If so, "When =
a DOIC node..." is too broadly stated.
>> =20
>>  I agree
>> =20
>>=20
>>=20
>> _______________________________________________
>> DiME mailing list
>>=20
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
>=20
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime


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To: Steve Donovan 
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Subject: Re: [Dime] Ben's comments on 5.2.2: 5th paragraph
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> On Jan 15, 2015, at 7:38 AM, Steve Donovan  =
wrote:
>=20
>=20
> On 1/15/15 3:59 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>> Ben wrote:
>> -- 5.2.2: 5th paragraph:
>> =20
>> This doesn't seem quite right, since it leaves the option of no =
abatement at all. Second, it doesn't seem to allow delegation of =
abatement downstream. When might one choose to ignore those SHOULDs? Is =
this here to allow delegation? If so, the use of SHOULD makes local =
throttling preferred over delegation.
>> =20
>>  My understanding is: If delegation of abatement is done by a =
node, then that node is no longer a reacting node.=20
>> The first SHOULD is ignored by reacting nodes that do not support =
diversion and hence always perform throttling. For the second SHOULD you =
MAY be right. We SHOULD replace it with MUST.
>> In addition the world =93otherwise=94 must not be read as =93 if =
diversion abatement treatment is not possible=94 but as =93 if diversion =
abatement treatment is not possible and if the first SHOULD is ignored=94.=

> SRD>  I mostly agree with Ulrich.  I propose the second sentence be =
changed to:
> The reacting node MUST apply throttling abatement treatment to =
requests
> identified for abatement treatment  when diversion treatment
> is not possible or was not applied.
>=20

I agree in general. But I suggest casting in the form of MUST apply an =
abatement treatment, which SHOULD be diversion if possible. That is, =
avoid baking the current fact that we have only two treatment =
possibilities into the normative language.  In the odd chance we come up =
with some new kind of treatment in the future, this form would require =
less modification.

>> =20
>>=20
>>=20
>> _______________________________________________
>> DiME mailing list
>>=20
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
>=20
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime


From nobody Thu Jan 15 07:17:29 2015
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To: Steve Donovan 
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Subject: Re: [Dime] Ben's suggested change on 5.2.1
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> On Jan 15, 2015, at 7:27 AM, Steve Donovan  =
wrote:
>=20
>=20
> On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>> Ben wrote:
>> -- section 5.2.1, and subsections:
>> =20
>> We still have some awkward use of SHOULDs and MAYs that I think are =
there to indicate that nodes don't really have to structure their =
internal state any particular way. But as written, it can be interpreted =
to allow them to ignore critical pieces of info. We would be better =
either removing the normative language entirely, or preface the section =
to say that these represent logical information, and that we do not =
assume any particular physical structure. (I prefer the latter at this =
point.) Details:
> SRD> How about the following added to section 5.2.1:
>=20
> "The contents of the OCS in the reporting node and in the reacting =
node represent logical constructs.  The actual internal physical =
structure of the state included in the OCS is an implementation =
decision."

+1

>=20
> SRD> I'm also ok with removing the normative language.  I'll show =
examples below.
>=20
>=20
>> =20
>> -- 5.2.1.1: "A reacting node SHOULD maintain...", "The host-type and =
realm-type OCS entries MAY include..."
> SRD> Change:
> A reacting node SHOULD maintain the following OCS per supported
>    Diameter application:
>=20
> to:
>=20
> A reacting node maintains the following OCS per supported
>    Diameter application:
>=20
> Change:
>=20
>    The host-type and realm-type OCS entries MAY include the following
>    information (the actual information stored is an implementation
>    decision):
>=20
> to:
>=20
>    The host-type and realm-type OCS entries include the following
>    information (the actual information stored is an implementation
>    decision):
>=20
> SRD> And so on.  This looks better and I don't think we lose anything.

WFM

>=20
>> =20
>> What if it doesn't? I think things fail.=20
>> =20
>> Also, I'm still confused by the first part of this section. The =
reacting node keeps state for every reported and active overload =
condition. Each will be the result of a realm report or a host report. =
The text makes it sound like it needs to keep OCS for both report types, =
even if it had not received both.
>> =20
>>  At the reacting node, when there is no overload, e.g. a =
previous OLR expired or end of overload has been explicitly signalled, =
it is up to implementations whether to store an OCS containing =93no =
overload=94 or whether =93no overload=94 is internally indicated by =
absence of an OCS.=20
> SRD> How about changing the first paragraph to the following:
>    A reacting node SHOULD maintain the following OCS per supported
>    received overload report:

WFM

>=20
>> =20
>> -- 5.2.1.1: "A reporting node SHOULD maintain OCS entries..." and "An =
OCS entry is identified ... and MAY include ..."
>> =20
>> What if it doesn't?
> SRD> This concern is addressed if we remove the SHOULDs and MAYs.
>> =20
>> -- 5.2.1.4: "A reporting node MUST NOT update the abatement algorithm =
in an active OCS entry."
>> =20
>> I thought we agreed to remove that, and replace it with the note at =
the beginning of 5.1?
> SRD> You are correct, the paragraph was entered but some of the =
normative statements were missed.  There is also a statement in the =
overview that still says reporting nodes can't change the algorithm =
during an active overload condition.  This will need to be removed as =
well.

Agreed (and i had a separate comment on the statement in the overview.)

>> =20
>> =20
>> =20
>>=20
>>=20
>> _______________________________________________
>> DiME mailing list
>>=20
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
>=20
> _______________________________________________
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To: Steve Donovan 
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Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
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Sorry, that was 4.2.=20

> On Jan 15, 2015, at 7:14 AM, Steve Donovan  =
wrote:
>=20
> I agree with Ulrich, I don't see the issue.
>=20
>=20
> On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>> Ben wrote:
>> -- 4.3, third paragraph from end:
>> =20
>> This still assumes that reporting nodes cannot change algorithms =
during overload. I thought we agreed to remove that. (The normative text =
is also still there--see later comment.)
>> =20
>>  I don=92t understand. In my copy of -06 the third paragraph =
from end in 4.3 reads:
>>    Two types of overload abatement treatment are defined, diversion =
and
>>    throttling.  Reacting nodes are responsible for determining which
>>    treatment is appropriate for individual requests.
>> How does this text assume that reporting nodes cannot change =
algorithms during overload?
>> =20
>> =20
>>=20
>>=20
>> _______________________________________________
>> DiME mailing list
>>=20
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
>=20
> _______________________________________________
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> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime


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Subject: Re: [Dime] Ben's comment to section 5.1.3
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On 1/15/15 9:06 AM, Ben Campbell wrote:
> Ah, I missed the reacting vs reporting node part. In that case, let me adjust my comment to say that I thought we had agreed to reduce the SHOULD in paragraph 2 to a MAY, or to make it non normative.
SRD> I'm ok with it being a MAY.  I don't recall agreeing to this 
already but I could have missed it.
>
> Also, paragraph 1 now seems unnecessary except to set the context for the following paragraphs. As such, it should probably not be normative.
SRD> I'm also ok with making this non normative.
>
>
>> On Jan 15, 2015, at 7:42 AM, Steve Donovan  wrote:
>>
>>
>> On 1/15/15 4:09 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>> Ben wrote:
>>> -- section 5.1.3:
>>>   
>>> The first two paragraphs conflict with paragraph 4. I think paragraph 4 is correct.
>>>   
>>>  I agree that paragraph 4 is correct. I do not see how the second paragraph conflicts with paragraph 4.
>> SRD> I also do not see the conflict.  Paragraph two is talking about taking on reacting node behavior and paragraph 4 is about taking on reporting node behavior.
>>>   
>>>
>>>
>>> _______________________________________________
>>> DiME mailing list
>>>
>>> DiME@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dime
>> _______________________________________________
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>> https://www.ietf.org/mailman/listinfo/dime
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Subject: Re: [Dime] Ben's comments on 5.2.2: 5th paragraph
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On 1/15/15 9:15 AM, Ben Campbell wrote:
>> On Jan 15, 2015, at 7:38 AM, Steve Donovan  wrote:
>>
>>
>> On 1/15/15 3:59 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>> Ben wrote:
>>> -- 5.2.2: 5th paragraph:
>>>   
>>> This doesn't seem quite right, since it leaves the option of no abatement at all. Second, it doesn't seem to allow delegation of abatement downstream. When might one choose to ignore those SHOULDs? Is this here to allow delegation? If so, the use of SHOULD makes local throttling preferred over delegation.
>>>   
>>>  My understanding is: If delegation of abatement is done by a node, then that node is no longer a reacting node.
>>> The first SHOULD is ignored by reacting nodes that do not support diversion and hence always perform throttling. For the second SHOULD you MAY be right. We SHOULD replace it with MUST.
>>> In addition the world “otherwise” must not be read as “ if diversion abatement treatment is not possible” but as “ if diversion abatement treatment is not possible and if the first SHOULD is ignored”.
>> SRD>  I mostly agree with Ulrich.  I propose the second sentence be changed to:
>> The reacting node MUST apply throttling abatement treatment to requests
>> identified for abatement treatment  when diversion treatment
>> is not possible or was not applied.
>>
> I agree in general. But I suggest casting in the form of MUST apply an abatement treatment, which SHOULD be diversion if possible. That is, avoid baking the current fact that we have only two treatment possibilities into the normative language.  In the odd chance we come up with some new kind of treatment in the future, this form would require less modification.
SRD> Ok. I'll propose wording later.
>
>>>   
>>>
>>>
>>> _______________________________________________
>>> DiME mailing list
>>>
>>> DiME@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dime
>> _______________________________________________
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From: "Wiehe, Ulrich (NSN - DE/Munich)" 
To: ext Ben Campbell , Steve Donovan 
Thread-Topic: [Dime] Ben's comments on 4.3, third paragraph from end
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Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
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Ben

The Note at the beginning of 5.1 is about change of announced capabilities =
in reacting nodes, while the text in 4.2 (and 5.2.1.4) is about change of s=
elected algorithm by reporting nodes.
I don't think the text in 4.2 (and 5.2.1.4) is totally wrong. Of course, if=
 the reacting node changes the set of announced capabilities, the reporting=
 node may change (or even need to  change) the selected algorithm. What is =
not allowed to be changed by the reporting node during an overload conditio=
n is the deterministic function that assignes to every set of commonly supp=
orted algorithms a distinct selected algorithm.


Ulrich


-----Original Message-----
From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben Campbell
Sent: Thursday, January 15, 2015 4:19 PM
To: Steve Donovan
Cc: dime@ietf.org
Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end

Sorry, that was 4.2.=20

> On Jan 15, 2015, at 7:14 AM, Steve Donovan  wro=
te:
>=20
> I agree with Ulrich, I don't see the issue.
>=20
>=20
> On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>> Ben wrote:
>> -- 4.3, third paragraph from end:
>> =20
>> This still assumes that reporting nodes cannot change algorithms during =
overload. I thought we agreed to remove that. (The normative text is also s=
till there--see later comment.)
>> =20
>>  I don't understand. In my copy of -06 the third paragraph from =
end in 4.3 reads:
>>    Two types of overload abatement treatment are defined, diversion and
>>    throttling.  Reacting nodes are responsible for determining which
>>    treatment is appropriate for individual requests.
>> How does this text assume that reporting nodes cannot change algorithms =
during overload?
>> =20
>> =20
>>=20
>>=20
>> _______________________________________________
>> DiME mailing list
>>=20
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
>=20
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime

_______________________________________________
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Subject: [Dime] [Editorial Errata Reported] RFC6733 (4234)
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The following errata report has been submitted for RFC6733,
"Diameter Base Protocol".

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata_search.php?rfc=6733&eid=4234

--------------------------------------
Type: Editorial
Reported by: Lionel Morand 

Section: 5.4

Original Text
-------------
In the last sentence of first paragraph odf the section 5.4, it is said:

   When a Diameter node disconnects one of its transport connections,
   its peer cannot know the reason for the disconnect and will most
   likely assume that a connectivity problem occurred or that the peer
   has rebooted.  In these cases, the peer may periodically attempt to
   reconnect, as stated in Section 2.1.  In the event that the
   disconnect was a result of either a shortage of internal resources or
   simply that the node in question has no intentions of forwarding any
   Diameter messages to the peer in the foreseeable future, a periodic
   connection request would not be welcomed.  The Disconnection-Reason
   AVP contains the reason the Diameter node issued the Disconnect-Peer-
   Request message.

Corrected Text
--------------
the sentence should be:


   When a Diameter node disconnects one of its transport connections,
   its peer cannot know the reason for the disconnect and will most
   likely assume that a connectivity problem occurred or that the peer
   has rebooted.  In these cases, the peer may periodically attempt to
   reconnect, as stated in Section 2.1.  In the event that the
   disconnect was a result of either a shortage of internal resources or
   simply that the node in question has no intentions of forwarding any
   Diameter messages to the peer in the foreseeable future, a periodic
   connection request would not be welcomed.  The Disconnect-Cause AVP
   contains the reason the Diameter node issued the Disconnect-Peer-
   Request message.

Notes
-----
The correct name of the AVP is "Disconnect-Cause AVP" and not "Disconnection-Reason AVP" that does not exist.

Instructions:
-------------
This erratum is currently posted as "Reported". If necessary, please
use "Reply All" to discuss whether it should be verified or
rejected. When a decision is reached, the verifying party (IESG)
can log in to change the status and edit the report, if necessary. 

--------------------------------------
RFC6733 (draft-ietf-dime-rfc3588bis-33)
--------------------------------------
Title               : Diameter Base Protocol
Publication Date    : October 2012
Author(s)           : V. Fajardo, Ed., J. Arkko, J. Loughney, G. Zorn, Ed.
Category            : PROPOSED STANDARD
Source              : Diameter Maintenance and Extensions
Area                : Operations and Management
Stream              : IETF
Verifying Party     : IESG


From nobody Fri Jan 16 11:55:35 2015
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Subject: [Dime] [Errata Held for Document Update] RFC6733 (4234)
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The following errata report has been held for document update 
for RFC6733, "Diameter Base Protocol". 

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata_search.php?rfc=6733&eid=4234

--------------------------------------
Status: Held for Document Update
Type: Editorial

Reported by: Lionel Morand 
Date Reported: 2015-01-16
Held by: Kathleen Moriarty (IESG)

Section: 5.4

Original Text
-------------
In the last sentence of first paragraph odf the section 5.4, it is said:

   When a Diameter node disconnects one of its transport connections,
   its peer cannot know the reason for the disconnect and will most
   likely assume that a connectivity problem occurred or that the peer
   has rebooted.  In these cases, the peer may periodically attempt to
   reconnect, as stated in Section 2.1.  In the event that the
   disconnect was a result of either a shortage of internal resources or
   simply that the node in question has no intentions of forwarding any
   Diameter messages to the peer in the foreseeable future, a periodic
   connection request would not be welcomed.  The Disconnection-Reason
   AVP contains the reason the Diameter node issued the Disconnect-Peer-
   Request message.

Corrected Text
--------------
the sentence should be:


   When a Diameter node disconnects one of its transport connections,
   its peer cannot know the reason for the disconnect and will most
   likely assume that a connectivity problem occurred or that the peer
   has rebooted.  In these cases, the peer may periodically attempt to
   reconnect, as stated in Section 2.1.  In the event that the
   disconnect was a result of either a shortage of internal resources or
   simply that the node in question has no intentions of forwarding any
   Diameter messages to the peer in the foreseeable future, a periodic
   connection request would not be welcomed.  The Disconnect-Cause AVP
   contains the reason the Diameter node issued the Disconnect-Peer-
   Request message.

Notes
-----
The correct name of the AVP is "Disconnect-Cause AVP" and not "Disconnection-Reason AVP" that does not exist.

--------------------------------------
RFC6733 (draft-ietf-dime-rfc3588bis-33)
--------------------------------------
Title               : Diameter Base Protocol
Publication Date    : October 2012
Author(s)           : V. Fajardo, Ed., J. Arkko, J. Loughney, G. Zorn, Ed.
Category            : PROPOSED STANDARD
Source              : Diameter Maintenance and Extensions
Area                : Operations and Management
Stream              : IETF
Verifying Party     : IESG


From nobody Tue Jan 20 10:02:45 2015
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Cc: dime@ietf.org
Subject: Re: [Dime] Ben's suggested change on 8, 1st paragraph
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I've added the following after the first paragraph in section 8:

Note: This only applies for DOIC nodes that are not the originator of 
the request.

Steve

On 1/15/15 9:12 AM, Ben Campbell wrote:
> Here we have an example of the need for the term "transaction client" :-)
>
> On a re-read, the text is technically correct, since it speaks of rejecting a Diameter request, vs rejecting some client protocol action. But I think puts too subtle a point on it for a reader who hasn't been involved in all our discussions. I think it would be helpful to point out that this does not apply if the throttling node is the originator of the request in the first place.
>
>> On Jan 15, 2015, at 7:40 AM, Steve Donovan  wrote:
>>
>> Clients can reject requests sent by servers.  I don't see the issue.
>>
>> On 1/15/15 3:59 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>> Ben wrote:
>>> -- 8, 1st paragraph:
>>>   
>>> This is just for agents and servers, not clients, right? If so, "When a DOIC node..." is too broadly stated.
>>>   
>>>  I agree
>>>   
>>>
>>>
>>> _______________________________________________
>>> DiME mailing list
>>>
>>> DiME@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dime
>> _______________________________________________
>> DiME mailing list
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
>


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Archived-At: 
Subject: Re: [Dime] Ben's comments on 5.2.2: 5th paragraph
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On 1/15/15 10:17 AM, Steve Donovan wrote:
>
> On 1/15/15 9:15 AM, Ben Campbell wrote:
>>> On Jan 15, 2015, at 7:38 AM, Steve Donovan 
>>>  wrote:
>>>
>>>
>>> On 1/15/15 3:59 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>>> Ben wrote:
>>>> -- 5.2.2: 5th paragraph:
>>>>   This doesn't seem quite right, since it leaves the option of no 
>>>> abatement at all. Second, it doesn't seem to allow delegation of 
>>>> abatement downstream. When might one choose to ignore those 
>>>> SHOULDs? Is this here to allow delegation? If so, the use of SHOULD 
>>>> makes local throttling preferred over delegation.
>>>>    My understanding is: If delegation of abatement is done 
>>>> by a node, then that node is no longer a reacting node.
>>>> The first SHOULD is ignored by reacting nodes that do not support 
>>>> diversion and hence always perform throttling. For the second 
>>>> SHOULD you MAY be right. We SHOULD replace it with MUST.
>>>> In addition the world “otherwise” must not be read as “ if 
>>>> diversion abatement treatment is not possible” but as “ if 
>>>> diversion abatement treatment is not possible and if the first 
>>>> SHOULD is ignored”.
>>> SRD>  I mostly agree with Ulrich.  I propose the second sentence be 
>>> changed to:
>>> The reacting node MUST apply throttling abatement treatment to requests
>>> identified for abatement treatment  when diversion treatment
>>> is not possible or was not applied.
>>>
>> I agree in general. But I suggest casting in the form of MUST apply 
>> an abatement treatment, which SHOULD be diversion if possible. That 
>> is, avoid baking the current fact that we have only two treatment 
>> possibilities into the normative language. In the odd chance we come 
>> up with some new kind of treatment in the future, this form would 
>> require less modification.
> SRD> Ok. I'll propose wording later.
SRD> Looking at this again, the previous paragraph handles the MUST 
apply abatement treatment.  The paragraph in question handles the SHOULD 
do diversion.  I've  added the sentence I suggested above and a note.  
The new text looks as follows:

    If the overload abatement algorithm selects the request for overload
    abatement treatment then the reacting node MUST apply overload
    abatement treatment on the request.  The abatement treatment applied
    depends on the context of the request.

    If diversion abatement treatment is possible (i.e. a different path
    for the request can be selected where the overloaded node is not part
    of the different path), then the reacting node SHOULD apply diversion
    abatement treatment to the request.  The reacting node MUST apply
    throttling abatement treatment to requests identified for abatement
    treatment when diversion treatment is not possible or was not
    applied.

       Note: This only addresses the case where there are two defined
       abatement treatments, diversion and throttling.  Any extension
       that defines a new abatement treatment must also defined the
       interaction of the new abatement treatment with existing
       treatments.

>>
>>>>
>>>>
>>>> _______________________________________________
>>>> DiME mailing list
>>>>
>>>> DiME@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/dime
>>> _______________________________________________
>>> DiME mailing list
>>> DiME@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dime
>>
>
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime
>


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From: Steve Donovan 
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Cc: "dime@ietf.org" 
Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
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  I have removed the last sentence in the paragraph in question.  The 
before and after for the paragraph is as follows:

Before:

    Reporting nodes can change the overload abatement algorithm indicated
    in the OC-Feature-Vector AVP if the reporting node is not currently
    in an overload condition and sending overload reports.  The reporting
    node is not allowed to change the overload abatement algorithm while
    the reporting node is in an overload condition.

After:

    Reporting nodes can change the overload abatement algorithm indicated
    in the OC-Feature-Vector AVP if the reporting node is not currently
    in an overload condition and sending overload reports.

Ulrich,

I'm not sure I understand your point about the assignment of commonly 
supported algorithms.  Are you ok with this change?

Regards,

Steve
On 1/16/15 4:30 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
> Ben
>
> The Note at the beginning of 5.1 is about change of announced capabilities in reacting nodes, while the text in 4.2 (and 5.2.1.4) is about change of selected algorithm by reporting nodes.
> I don't think the text in 4.2 (and 5.2.1.4) is totally wrong. Of course, if the reacting node changes the set of announced capabilities, the reporting node may change (or even need to  change) the selected algorithm. What is not allowed to be changed by the reporting node during an overload condition is the deterministic function that assignes to every set of commonly supported algorithms a distinct selected algorithm.
>
>
> Ulrich
>
>
> -----Original Message-----
> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben Campbell
> Sent: Thursday, January 15, 2015 4:19 PM
> To: Steve Donovan
> Cc: dime@ietf.org
> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>
> Sorry, that was 4.2.
>
>> On Jan 15, 2015, at 7:14 AM, Steve Donovan  wrote:
>>
>> I agree with Ulrich, I don't see the issue.
>>
>>
>> On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>> Ben wrote:
>>> -- 4.3, third paragraph from end:
>>>   
>>> This still assumes that reporting nodes cannot change algorithms during overload. I thought we agreed to remove that. (The normative text is also still there--see later comment.)
>>>   
>>>  I don't understand. In my copy of -06 the third paragraph from end in 4.3 reads:
>>>     Two types of overload abatement treatment are defined, diversion and
>>>     throttling.  Reacting nodes are responsible for determining which
>>>     treatment is appropriate for individual requests.
>>> How does this text assume that reporting nodes cannot change algorithms during overload?
>>>   
>>>   
>>>
>>>
>>> _______________________________________________
>>> DiME mailing list
>>>
>>> DiME@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dime
>> _______________________________________________
>> DiME mailing list
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime
>


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The following is the resolution of Ben's issues that were not addressed 
directly in an email thread started by Ulrich.

Regards,

Steve

On 1/14/15 5:56 PM, Ben Campbell wrote:
>
> -- 5.2.1.4: "A reporting node MUST NOT update the abatement algorithm in an active OCS entry."
>
> I thought we agreed to remove that, and replace it with the note at the beginning of 5.1?
SRD> I have removed the paragraph.
>
> -- 5.3, 4th paragraph:
>
> As I mentioned in previous discussion, after re-reading the related text in 6733, it's no longer clear to me this works like we thought it did. That is, I think any attempt to make sub-AVPs mandatory risks causing errors in the enclosing Diameter transaction. I don't know how to solve this, other just disallowing mandatory sub-AVPs. (Jouni previously convinced me 6733 treatment of the m-bit in sub-avps worked like we wanted--perhaps he can re-convince me :-)
SRD>Given that Jouni successfully convinced Ben about the 6733 
treatment, I'm not planning to make any changes, as I'm assuming he can 
be just as successful the second time.
>
> -- 6.3, paragraph 2:
>
> This is stronger than the SHOULDs in the general behavior section (5.2.2)
SRD> Section 5.2.2 says:

    If the request matches an active OCS then the reacting node MUST use
    the overload abatement algorithm indicated in the OCS to determine if
    the request is to receive overload abatement treatment.

Section 6.3 says:

    When receiving an OC-OLR in an answer message where the algorithm
    indicated in the OC-Supported-Features AVP is the loss algorithm, the
    reacting node MUST apply abatement treatment to the requested
    percentage of request messages sent.

I don't see the issue.
>
> Paragraph 5:
>
> Is this redundant to the last paragraph of 5.2.2?
SRD> I don't see an issue.  One is general and the other specific to the 
loss algorithm.  They don't conflict.
>
> Editorial:
>
> -- section 2, "Diversion"
SRD> Changed
>
> repeated "for".
SRD> Changed
>
> -- section 3:
>
> I suggest adding a sentence that the same words that are not in all-caps are excepted from the 2119 interpretation.  (We have a few instances of lowercase "must", "should", etc. The uglier alternative would be to hunt down and kill all of them.)
SRD> Done. Section 3 now contains the following:

    The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
    "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
    document are to be interpreted as described in RFC 2119 [RFC2119].

    RFC 2119 [RFC2119] interpretation does not apply for the above listed
    words when they are not used in all-caps format.

>
> -- 4.3, 4th paragraph from end
>
> s/ "... applying the overload abatement algorithm..." / "... apply the overload abatement algorithm..."
SRD> Done
>
> -- Figure 1:
>
> The boxes have caret characters in the top and bottom horizontal lines. Do those mean something?
SRD> I removed the carets.  I think they were just meant to be decorative.
>
> -- 6.3, 4th paragraph:
>
> This seems like a restatement of paragraph 2.
SRD> I removed the 4th paragraph.
>
>
>> On Jan 13, 2015, at 9:28 AM, Jouni Korhonen  wrote:
>>
>> Folks,
>>
>> Thanks for the hard work on the -06 revision. Since the changes
>> from -05 to -06 were many, chairs decided to run another short
>> WGLC for the WG to verify all changes and discussions are
>> implemented correctly.
>>
>> This email starts a one week WGLC #2 for draft-ietf-dime-ovli-06. The
>> WGLC ends 20th Jan 2015 EOB (PST). Post your review comments and
>> concerns to the mailinglist. Also make use of the issue tracker
>> (remember to select "severity" as "in WG last call").
>>
>> Lionel & Jouni
>>
>> _______________________________________________
>> DiME mailing list
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
>


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    The following is the resolution of Ben's issues that were not
    addressed directly in an email thread started by Ulrich.

    

    Regards,

    

    Steve 

    

    
On 1/14/15 5:56 PM, Ben Campbell wrote:

    

    

      

-- 5.2.1.4: "A reporting node MUST NOT update the abatement algorithm in an active OCS entry."

I thought we agreed to remove that, and replace it with the note at the beginning of 5.1?

    

    SRD> I have removed the paragraph.

    

      

-- 5.3, 4th paragraph:

As I mentioned in previous discussion, after re-reading the related text in 6733, it's no longer clear to me this works like we thought it did. That is, I think any attempt to make sub-AVPs mandatory risks causing errors in the enclosing Diameter transaction. I don't know how to solve this, other just disallowing mandatory sub-AVPs. (Jouni previously convinced me 6733 treatment of the m-bit in sub-avps worked like we wanted--perhaps he can re-convince me :-)  

    

    SRD>Given that Jouni successfully convinced Ben about the 6733
    treatment, I'm not planning to make any changes, as I'm assuming he
    can be just as successful the second time. 

    

      

-- 6.3, paragraph 2:

This is stronger than the SHOULDs in the general behavior section (5.2.2)

    

    SRD> Section 5.2.2 says:

    

    
    
   If the request matches an active OCS then the reacting node MUST use
   the overload abatement algorithm indicated in the OCS to determine if
   the request is to receive overload abatement treatment.


    Section 6.3 says:

    

    
    
   When receiving an OC-OLR in an answer message where the algorithm
   indicated in the OC-Supported-Features AVP is the loss algorithm, the
   reacting node MUST apply abatement treatment to the requested
   percentage of request messages sent.

    I don't see the issue.

    

      

Paragraph 5: 

Is this redundant to the last paragraph of 5.2.2?

    

    SRD> I don't see an issue.  One is general and the other specific
    to the loss algorithm.  They don't conflict.

    

      

Editorial:

-- section 2, "Diversion"

    

    SRD> Changed

    

      

repeated "for".

    

    SRD> Changed

    

      

-- section 3:

I suggest adding a sentence that the same words that are not in all-caps are excepted from the 2119 interpretation.  (We have a few instances of lowercase "must", "should", etc. The uglier alternative would be to hunt down and kill all of them.)

    

    SRD> Done. Section 3 now contains the following:

    

    
    
   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

   RFC 2119 [RFC2119] interpretation does not apply for the above listed
   words when they are not used in all-caps format.

    

      

-- 4.3, 4th paragraph from end

s/ "... applying the overload abatement algorithm..." / "... apply the overload abatement algorithm..."

    

    SRD> Done

    

      

-- Figure 1:

The boxes have caret characters in the top and bottom horizontal lines. Do those mean something?

    

    SRD> I removed the carets.  I think they were just meant to be
    decorative. 

    

      

-- 6.3, 4th paragraph:

This seems like a restatement of paragraph 2.

    

    SRD> I removed the 4th paragraph.

    

      




      

        
On Jan 13, 2015, at 9:28 AM, Jouni Korhonen <jouni.nospam@gmail.com> wrote:

Folks,

Thanks for the hard work on the -06 revision. Since the changes
from -05 to -06 were many, chairs decided to run another short
WGLC for the WG to verify all changes and discussions are
implemented correctly.

This email starts a one week WGLC #2 for draft-ietf-dime-ovli-06. The
WGLC ends 20th Jan 2015 EOB (PST). Post your review comments and
concerns to the mailinglist. Also make use of the issue tracker
(remember to select "severity" as "in WG last call").

Lionel & Jouni

_______________________________________________
DiME mailing list
DiME@ietf.org
https://www.ietf.org/mailman/listinfo/dime


      

      



    

    

  


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Archived-At: 
Subject: Re: [Dime] Updated DOIC Requirements Analysis
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I'm not currently planning to make any updates to the requirements 
analysis section as I haven't seen consensus on the need to change 
anything in the portion that will remain in the document.

If we want to continue to debate the sections that are slated to be 
removed then I suggest we do that in a separate email thread that is not 
tied to moving the document out of WGLC.

Regards,

Steve
On 1/7/15 2:54 PM, Ben Campbell wrote:
> (Catching up on older stuff)
>
> Comments inline. But keep in mind that the detailed requirements are to be removed from the RFC, so I'm not sure we need to spend too much time on them. (Only the first discussion point addresses text that is to remain in the RFC.)
>
> Thanks!
>
> Ben.
>
>> On Dec 12, 2014, at 2:24 AM, Maria Cruz Bartolome  wrote:
>>
>> Hello Ben,
>>
>> See comments below
>> Thanks
>> /MCruz
>>
>>> C.2.  Detection of non-supporting Intermediaries
>>>
>>>    The DOIC mechanism as currently defined does not allow supporting
>>>    nodes to automatically determine whether OC-Supported-Features or OC-
>>>    OLR AVPs are originated by a peer node, or by a non-peer node and
>>>    sent across a non-supporting peer.  This makes it impossible to
>>>    detect the presence of non-supporting nodes between supporting nodes,
>>>    except by configuration.  The working group determined that such a
>>>    configuration requirement is acceptable.
>>>
>>>    This limits full compliance with certain requirements related to the
>>>    limitation of new configuration, deployment in environments with
>>>    mixed support, operating across non-supporting agents, and
>>>    authorization.
>>> [MCruz] I think this paragraph should state what are the limitations
>>> (generally, like you did for rest of them) Morever, since detailed descriptions will be deleted.
>>>
>> The limitations are discussed in the security consideration section. Basically if a node expects an agent to enforce any DOIC related policy (e.g. making sure DOIC avps do not leak to unauthorized nodes), it has to know that the agent itself supports DOIC. Right now it can only know that by having an administrator tell it that (violating the limitation on new configuration), by knowing that all agents in the network support DOIC (violating the mixed support and non-supporting agent requirements.)
>> [MCruz] Please, include text accordingly then. The text now "certain requirements related to" does not provide an information that anyone could trace easily.
> I was explicitly asked by other people (e.g. Lionel) to list the impacted requirements descriptively, rather than by reference, in this section. The "certain requirements related to" are described by the words immediately after that phrase. That is, the requirement to limit new configuration, the requirement to allow deployments with mixed support, and the requirements to authorize who can send and receive overload information.
>
>>>
>>>
>>>    REQ 6:  The solution designers SHOULD seek to minimize the amount of
>>>            new configuration required in order to work.  For example, it
>>>            is better to allow peers to advertise or negotiate support
>>>            for the solution, rather than to require that this knowledge
>>>            to be configured at each node.
>>>
>>>            *Partially Compliant*. Most DOIC parameters are advertised
>>>            using the DOIC capability announcement mechanism.  However,
>>>            there are some situations where configuration is required.
>>>            For example, a DOIC node detect the fact that a peer may not
>>>            support DOIC when nodes on the other side of the non-
>>>            supporting node do support DOIC without configuration.
>>>
>>> [MCruz] Could you clarify last example? “withoug configuration� I do not understand what you meant.
>> Here's an example:
>>
>> C ------ A ------ S
>>
>> If both C and S support DOIC, there is no way for them to tell whether A supports DOIC. Consider two cases:
>>
>> 1) A supports DOIC. But since C already inserts OC-S-F in all requests, and S inserts it in all answers, A passes them through unchanged.
>> 2) A does not support DOIC, but passes through unknown AVPs. Since OC-S-F will be unknown to it, it passes it through unchanged.
>>
>>  From the perspective of C and S, the requests and answers look identical for both cases. Even if A actually changes the content of an OC-S-F avp, neither endpoint can tell if the resulting AVP came from A or the opposite endpoint.
>>
>> Personally, I think this is a showstopper. But the working group consensus did not agree.
>>
>> [MCruz] Several comments:
>> a) Then you consider this requirement as "partly compliant" since you consider configuration is required in a node to identify whether or not its adjacent peers support DOIC, right? If so, could you explain why a node needs to know whether or not the peer support DOIC, a part from what is included in the advertisement mechanism we defined?
> If you do not know that a peer supports DOIC, you cannot assume that it will enforce DOIC related policies (I believe that is sufficiently described in the security configurations.)
>
>> b) What do you think is a "show stopper"? The need for configuration?
> Explicitly, the need to configure whether you can trust a peer to enforce DOIC related polices. I believe this is an important security issue, and that being unable to determine it automatically is a real problem. Requiring this sort of configuration doesn't scale well, and has the potential of creating real management and operations problems. (Note the IETF area that DIME is in.)
>
> But, as I said, the working group seems to have chosen to move forward without an automatic way to do this. Perhaps it can be improved in a future extension.
>
>>
>>
>>>    REQ 23: The solution MUST provide sufficient information to enable a
>>>            load-balancing node to divert messages that are rejected or
>>>            otherwise throttled by an overloaded upstream node to other
>>>            upstream nodes that are the most likely to have sufficient
>>>            capacity to process them.
>>>
>>>            *Not Compliant*. DOIC provides no built in mechanism to
>>>            determine the best place to divert messages that would
>>>            otherwise be throttled.  This can be accomplished with a
>>>            future "load" extension, or with proprietary load balancing
>>>            mechanisms.
>>>
>>> [MCruz] Partly Compliant. DOIC Overload information can be used already by proprietary load-balancing implementations.
>>>
>>> Load information will be a plus to this.
>>>
>> I disagree, or at least think that would be _very_ partial. You won't have any overload information unless the potential diversion targets are also overloaded.
>> [MCruz] In case servers in the pools are DOIC enabled the Overload information is provided by all of them, under overload occurrences, then this information is valid (maybe not sufficient in all cases, I agree, but valid in most of them) to divert.
>> In case we have mixed servers (DOIC-supporting and non-DOIC) we have some limitations as well.
> The purpose behind this requirement was to allow load balancing of requests that are diverted to (hopefully) non-overloaded servers, in a way that reduces the chance of causing those servers to also become overloaded. Those servers will not be providing OLRs.
>
> I still do not agree that the corner case of diverting request to _overloaded_ servers is big enough to consider this partially compliant.
>
>>
>>>
>>>    REQ 30: The solution MUST NOT interfere with any Diameter-compliant
>>>            method that a node may use to protect itself from overload
>>>            from non-supporting nodes or from denial-of-service attacks.
>>>
>>>            *Compliant*. The specification recommends that any such
>>>            protection mechanism needed without DOIC should continue to
>>>            be employed with DOIC.
>>> [MCruz] Could you point our where in the draft it is described?
>> 9.3
>> [MCruz] I do not think 9.3 says what you mentioned here.
>> It says "In the absence of an overload control mechanism...". It is not said the DOIC shall not interfere with any other Diameter method for protection, we may need to add this information to the draft in fact.
>> A part from that, I think 9.3. should say "for non-DOIC supporting nodes/networks..." not just "in the absence of _an_ overload control mechanism"...
> The "absence of an OC strategy" part is there to provide the context that these protection mechanisms existed, or needed to exist, prior to the availability of DOIC. The section goes on to say that, even with DOIC, these protections are still needed to deal with non-compliant nodes.
>
> Are you arguing that we don't comply with Req 30? (Keeping in mind that this text is to be removed from the RFC.)
>
>>
>>
>>
>>
>> /Ben.
>>
>> _______________________________________________
>> DiME mailing list
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime


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To: Steve Donovan 
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Subject: Re: [Dime] WLGC #2 for draft-ietf-dime-ovli-06
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> On Jan 20, 2015, at 12:42 PM, Steve Donovan  =
wrote:
>=20
> The following is the resolution of Ben's issues that were not =
addressed directly in an email thread started by Ulrich.
>=20
> Regards,
>=20
> Steve=20
>=20
>>=20
>> -- 5.3, 4th paragraph:
>>=20
>> As I mentioned in previous discussion, after re-reading the related =
text in 6733, it's no longer clear to me this works like we thought it =
did. That is, I think any attempt to make sub-AVPs mandatory risks =
causing errors in the enclosing Diameter transaction. I don't know how =
to solve this, other just disallowing mandatory sub-AVPs. (Jouni =
previously convinced me 6733 treatment of the m-bit in sub-avps worked =
like we wanted--perhaps he can re-convince me :-) =20
>>=20
> SRD>Given that Jouni successfully convinced Ben about the 6733 =
treatment, I'm not planning to make any changes, as I'm assuming he can =
be just as successful the second time.=20

I think that's a bad assumption.

We had previously assumed that if a node receives a grouped AVP (without =
the m-bit set) that includes an unrecognized sub-avp with the m-bit set, =
then the receiver could just ignore the entire grouped AVP, and =
otherwise process the transaction. But 6733 actually says the following:

"Receivers of a Grouped AVP that
   does not have the 'M' (mandatory) bit set and one or more of the
   encapsulated AVPs within the group has the 'M' (mandatory) bit set
   MAY simply be ignored if the Grouped AVP itself is unrecognized.  The
   rule applies even if the encapsulated AVP with its 'M' (mandatory)
   bit set is further encapsulated within other sub-groups, i.e., other
   Grouped AVPs embedded within the Grouped AVP."

Note the "... if the Grouped AVP itself is unrecognized." clause.

The case we have in mind is when you receive a _recognized_ grouped AVP =
(that is, you implement DOIC), but it includes an unrecognized sub-avp =
with the M-bit set. This is not covered by the exception. This would =
seem to indicate that the entire request must fail. I don't think that's =
what we want.

At this point, I think we need to either say that sub-avps of DOIC =
grouped AVPs either 1) MUST NOT have the m-bit set, or 2) MUST NOT have =
the m-bit set unless the sub-avp is part of an extension explicitly =
negotiated in the feature vector.


>>=20
>> -- 6.3, paragraph 2:
>>=20
>> This is stronger than the SHOULDs in the general behavior section =
(5.2.2)
>>=20
> SRD> Section 5.2.2 says:
>=20
>    If the request matches an active OCS then the reacting node MUST =
use
>    the overload abatement algorithm indicated in the OCS to determine =
if
>    the request is to receive overload abatement treatment.
>=20
> Section 6.3 says:
>=20
>    When receiving an OC-OLR in an answer message where the algorithm
>    indicated in the OC-Supported-Features AVP is the loss algorithm, =
the
>    reacting node MUST apply abatement treatment to the requested
>    percentage of request messages sent.
>=20
> I don't see the issue.

I was referring to the "SHOULD apply diversion, else SHOULD apply =
throttling" language. But that's been fixed as part of a separate =
discussion.

>>=20
>> Paragraph 5:=20
>>=20
>> Is this redundant to the last paragraph of 5.2.2?
>>=20
> SRD> I don't see an issue.  One is general and the other specific to =
the loss algorithm.  They don't conflict.

The one in 5.2.2 is specific to situations where an OLR quenches all =
requests, and says MUST. So is this, and says RECOMMENDED (which means =
SHOULD in 2119).

If the idea is that the text in 6.3 is the recommended way to fulfill =
the MUST in 5.2.2, then that's okay I guess (although I would prefer one =
of the two to be non-normative.)

Another approach would to leave this to 6.3, and add something to the =
effect that any new algorithm that can cause total quenching of requests =
must address how the reacting node restarts from that state.=20

[...]=


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From: Ben Campbell 
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To: Steve Donovan 
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Cc: dime@ietf.org
Subject: Re: [Dime] Updated DOIC Requirements Analysis
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> On Jan 20, 2015, at 12:49 PM, Steve Donovan  =
wrote:
>=20
> I'm not currently planning to make any updates to the requirements =
analysis section as I haven't seen consensus on the need to change =
anything in the portion that will remain in the document.
>=20
> If we want to continue to debate the sections that are slated to be =
removed then I suggest we do that in a separate email thread that is not =
tied to moving the document out of WGLC.

Isn't this that separate thread?

But in any case, I do not think we need changes to the reqs analysis =
sections, especially the detail section that we have been directed to =
remove.

>=20
> Regards,
>=20
> Steve
> On 1/7/15 2:54 PM, Ben Campbell wrote:
>> (Catching up on older stuff)
>>=20
>> Comments inline. But keep in mind that the detailed requirements are =
to be removed from the RFC, so I'm not sure we need to spend too much =
time on them. (Only the first discussion point addresses text that is to =
remain in the RFC.)
>>=20
>> Thanks!
>>=20
>> Ben.
>>=20
>>> On Dec 12, 2014, at 2:24 AM, Maria Cruz Bartolome =
 wrote:
>>>=20
>>> Hello Ben,
>>>=20
>>> See comments below
>>> Thanks
>>> /MCruz
>>>=20
>>>> C.2.  Detection of non-supporting Intermediaries
>>>>=20
>>>>   The DOIC mechanism as currently defined does not allow supporting
>>>>   nodes to automatically determine whether OC-Supported-Features or =
OC-
>>>>   OLR AVPs are originated by a peer node, or by a non-peer node and
>>>>   sent across a non-supporting peer.  This makes it impossible to
>>>>   detect the presence of non-supporting nodes between supporting =
nodes,
>>>>   except by configuration.  The working group determined that such =
a
>>>>   configuration requirement is acceptable.
>>>>=20
>>>>   This limits full compliance with certain requirements related to =
the
>>>>   limitation of new configuration, deployment in environments with
>>>>   mixed support, operating across non-supporting agents, and
>>>>   authorization.
>>>> [MCruz] I think this paragraph should state what are the =
limitations
>>>> (generally, like you did for rest of them) Morever, since detailed =
descriptions will be deleted.
>>>>=20
>>> The limitations are discussed in the security consideration section. =
Basically if a node expects an agent to enforce any DOIC related policy =
(e.g. making sure DOIC avps do not leak to unauthorized nodes), it has =
to know that the agent itself supports DOIC. Right now it can only know =
that by having an administrator tell it that (violating the limitation =
on new configuration), by knowing that all agents in the network support =
DOIC (violating the mixed support and non-supporting agent =
requirements.)
>>> [MCruz] Please, include text accordingly then. The text now "certain =
requirements related to" does not provide an information that anyone =
could trace easily.
>> I was explicitly asked by other people (e.g. Lionel) to list the =
impacted requirements descriptively, rather than by reference, in this =
section. The "certain requirements related to" are described by the =
words immediately after that phrase. That is, the requirement to limit =
new configuration, the requirement to allow deployments with mixed =
support, and the requirements to authorize who can send and receive =
overload information.
>>=20
>>>>=20
>>>>=20
>>>>   REQ 6:  The solution designers SHOULD seek to minimize the amount =
of
>>>>           new configuration required in order to work.  For =
example, it
>>>>           is better to allow peers to advertise or negotiate =
support
>>>>           for the solution, rather than to require that this =
knowledge
>>>>           to be configured at each node.
>>>>=20
>>>>           *Partially Compliant*. Most DOIC parameters are =
advertised
>>>>           using the DOIC capability announcement mechanism.  =
However,
>>>>           there are some situations where configuration is =
required.
>>>>           For example, a DOIC node detect the fact that a peer may =
not
>>>>           support DOIC when nodes on the other side of the non-
>>>>           supporting node do support DOIC without configuration.
>>>>=20
>>>> [MCruz] Could you clarify last example? =E2=80=9Cwithoug =
configuration=E2=80=9D? I do not understand what you meant.
>>> Here's an example:
>>>=20
>>> C ------ A ------ S
>>>=20
>>> If both C and S support DOIC, there is no way for them to tell =
whether A supports DOIC. Consider two cases:
>>>=20
>>> 1) A supports DOIC. But since C already inserts OC-S-F in all =
requests, and S inserts it in all answers, A passes them through =
unchanged.
>>> 2) A does not support DOIC, but passes through unknown AVPs. Since =
OC-S-F will be unknown to it, it passes it through unchanged.
>>>=20
>>> =46rom the perspective of C and S, the requests and answers look =
identical for both cases. Even if A actually changes the content of an =
OC-S-F avp, neither endpoint can tell if the resulting AVP came from A =
or the opposite endpoint.
>>>=20
>>> Personally, I think this is a showstopper. But the working group =
consensus did not agree.
>>>=20
>>> [MCruz] Several comments:
>>> a) Then you consider this requirement as "partly compliant" since =
you consider configuration is required in a node to identify whether or =
not its adjacent peers support DOIC, right? If so, could you explain why =
a node needs to know whether or not the peer support DOIC, a part from =
what is included in the advertisement mechanism we defined?
>> If you do not know that a peer supports DOIC, you cannot assume that =
it will enforce DOIC related policies (I believe that is sufficiently =
described in the security configurations.)
>>=20
>>> b) What do you think is a "show stopper"? The need for =
configuration?
>> Explicitly, the need to configure whether you can trust a peer to =
enforce DOIC related polices. I believe this is an important security =
issue, and that being unable to determine it automatically is a real =
problem. Requiring this sort of configuration doesn't scale well, and =
has the potential of creating real management and operations problems. =
(Note the IETF area that DIME is in.)
>>=20
>> But, as I said, the working group seems to have chosen to move =
forward without an automatic way to do this. Perhaps it can be improved =
in a future extension.
>>=20
>>>=20
>>>=20
>>>>   REQ 23: The solution MUST provide sufficient information to =
enable a
>>>>           load-balancing node to divert messages that are rejected =
or
>>>>           otherwise throttled by an overloaded upstream node to =
other
>>>>           upstream nodes that are the most likely to have =
sufficient
>>>>           capacity to process them.
>>>>=20
>>>>           *Not Compliant*. DOIC provides no built in mechanism to
>>>>           determine the best place to divert messages that would
>>>>           otherwise be throttled.  This can be accomplished with a
>>>>           future "load" extension, or with proprietary load =
balancing
>>>>           mechanisms.
>>>>=20
>>>> [MCruz] Partly Compliant. DOIC Overload information can be used =
already by proprietary load-balancing implementations.
>>>>=20
>>>> Load information will be a plus to this.
>>>>=20
>>> I disagree, or at least think that would be _very_ partial. You =
won't have any overload information unless the potential diversion =
targets are also overloaded.
>>> [MCruz] In case servers in the pools are DOIC enabled the Overload =
information is provided by all of them, under overload occurrences, then =
this information is valid (maybe not sufficient in all cases, I agree, =
but valid in most of them) to divert.
>>> In case we have mixed servers (DOIC-supporting and non-DOIC) we have =
some limitations as well.
>> The purpose behind this requirement was to allow load balancing of =
requests that are diverted to (hopefully) non-overloaded servers, in a =
way that reduces the chance of causing those servers to also become =
overloaded. Those servers will not be providing OLRs.
>>=20
>> I still do not agree that the corner case of diverting request to =
_overloaded_ servers is big enough to consider this partially compliant.
>>=20
>>>=20
>>>>=20
>>>>   REQ 30: The solution MUST NOT interfere with any =
Diameter-compliant
>>>>           method that a node may use to protect itself from =
overload
>>>>           from non-supporting nodes or from denial-of-service =
attacks.
>>>>=20
>>>>           *Compliant*. The specification recommends that any such
>>>>           protection mechanism needed without DOIC should continue =
to
>>>>           be employed with DOIC.
>>>> [MCruz] Could you point our where in the draft it is described?
>>> 9.3
>>> [MCruz] I do not think 9.3 says what you mentioned here.
>>> It says "In the absence of an overload control mechanism...". It is =
not said the DOIC shall not interfere with any other Diameter method for =
protection, we may need to add this information to the draft in fact.
>>> A part from that, I think 9.3. should say "for non-DOIC supporting =
nodes/networks..." not just "in the absence of _an_ overload control =
mechanism"...
>> The "absence of an OC strategy" part is there to provide the context =
that these protection mechanisms existed, or needed to exist, prior to =
the availability of DOIC. The section goes on to say that, even with =
DOIC, these protections are still needed to deal with non-compliant =
nodes.
>>=20
>> Are you arguing that we don't comply with Req 30? (Keeping in mind =
that this text is to be removed from the RFC.)
>>=20
>>>=20
>>>=20
>>>=20
>>>=20
>>> /Ben.
>>>=20
>>> _______________________________________________
>>> DiME mailing list
>>> DiME@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dime
>> _______________________________________________
>> DiME mailing list
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
>=20
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime


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From: Ben Campbell 
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To: Steve Donovan 
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Subject: Re: [Dime] Ben's comments on 5.2.2: 5th paragraph
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> On Jan 20, 2015, at 12:17 PM, Steve Donovan  =
wrote:
>=20
> SRD> Looking at this again, the previous paragraph handles the MUST =
apply abatement treatment.  The paragraph in question handles the SHOULD =
do diversion.  I've  added the sentence I suggested above and a note.  =
The new text looks as follows:
>=20
>   If the overload abatement algorithm selects the request for overload
>   abatement treatment then the reacting node MUST apply overload
>   abatement treatment on the request.  The abatement treatment applied
>   depends on the context of the request.
>=20
>   If diversion abatement treatment is possible (i.e. a different path
>   for the request can be selected where the overloaded node is not =
part
>   of the different path), then the reacting node SHOULD apply =
diversion
>   abatement treatment to the request.  The reacting node MUST apply
>   throttling abatement treatment to requests identified for abatement
>   treatment when diversion treatment is not possible or was not
>   applied.

I'm okay with the text, but the last sentence doesn't need to be =
normative, since it's entirely covered as a consequence of the previous =
MUST and SHOULD. And removing that last MUST makes the note less =
important.

>=20
>      Note: This only addresses the case where there are two defined
>      abatement treatments, diversion and throttling.  Any extension
>      that defines a new abatement treatment must also defined the
>      interaction of the new abatement treatment with existing
>      treatments.

If we need the note, shouldn't it go in the extensibility section?  =
(It's probably still worth having, in case someone defines a new Foo =
treatment that is even preferred over diversion.)


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Subject: Re: [Dime] Updated DOIC Requirements Analysis
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On 1/20/15 2:30 PM, Ben Campbell wrote:
>> On Jan 20, 2015, at 12:49 PM, Steve Donovan  wrote:
>>
>> I'm not currently planning to make any updates to the requirements analysis section as I haven't seen consensus on the need to change anything in the portion that will remain in the document.
>>
>> If we want to continue to debate the sections that are slated to be removed then I suggest we do that in a separate email thread that is not tied to moving the document out of WGLC.
> Isn't this that separate thread?
SRD> Yes, I was thinking in terms of the set of items that needed 
addressing for WGLC.
>
> But in any case, I do not think we need changes to the reqs analysis sections, especially the detail section that we have been directed to remove.
SRD> Cool
>
>> Regards,
>>
>> Steve
>> On 1/7/15 2:54 PM, Ben Campbell wrote:
>>> (Catching up on older stuff)
>>>
>>> Comments inline. But keep in mind that the detailed requirements are to be removed from the RFC, so I'm not sure we need to spend too much time on them. (Only the first discussion point addresses text that is to remain in the RFC.)
>>>
>>> Thanks!
>>>
>>> Ben.
>>>
>>>> On Dec 12, 2014, at 2:24 AM, Maria Cruz Bartolome  wrote:
>>>>
>>>> Hello Ben,
>>>>
>>>> See comments below
>>>> Thanks
>>>> /MCruz
>>>>
>>>>> C.2.  Detection of non-supporting Intermediaries
>>>>>
>>>>>    The DOIC mechanism as currently defined does not allow supporting
>>>>>    nodes to automatically determine whether OC-Supported-Features or OC-
>>>>>    OLR AVPs are originated by a peer node, or by a non-peer node and
>>>>>    sent across a non-supporting peer.  This makes it impossible to
>>>>>    detect the presence of non-supporting nodes between supporting nodes,
>>>>>    except by configuration.  The working group determined that such a
>>>>>    configuration requirement is acceptable.
>>>>>
>>>>>    This limits full compliance with certain requirements related to the
>>>>>    limitation of new configuration, deployment in environments with
>>>>>    mixed support, operating across non-supporting agents, and
>>>>>    authorization.
>>>>> [MCruz] I think this paragraph should state what are the limitations
>>>>> (generally, like you did for rest of them) Morever, since detailed descriptions will be deleted.
>>>>>
>>>> The limitations are discussed in the security consideration section. Basically if a node expects an agent to enforce any DOIC related policy (e.g. making sure DOIC avps do not leak to unauthorized nodes), it has to know that the agent itself supports DOIC. Right now it can only know that by having an administrator tell it that (violating the limitation on new configuration), by knowing that all agents in the network support DOIC (violating the mixed support and non-supporting agent requirements.)
>>>> [MCruz] Please, include text accordingly then. The text now "certain requirements related to" does not provide an information that anyone could trace easily.
>>> I was explicitly asked by other people (e.g. Lionel) to list the impacted requirements descriptively, rather than by reference, in this section. The "certain requirements related to" are described by the words immediately after that phrase. That is, the requirement to limit new configuration, the requirement to allow deployments with mixed support, and the requirements to authorize who can send and receive overload information.
>>>
>>>>>
>>>>>    REQ 6:  The solution designers SHOULD seek to minimize the amount of
>>>>>            new configuration required in order to work.  For example, it
>>>>>            is better to allow peers to advertise or negotiate support
>>>>>            for the solution, rather than to require that this knowledge
>>>>>            to be configured at each node.
>>>>>
>>>>>            *Partially Compliant*. Most DOIC parameters are advertised
>>>>>            using the DOIC capability announcement mechanism.  However,
>>>>>            there are some situations where configuration is required.
>>>>>            For example, a DOIC node detect the fact that a peer may not
>>>>>            support DOIC when nodes on the other side of the non-
>>>>>            supporting node do support DOIC without configuration.
>>>>>
>>>>> [MCruz] Could you clarify last example? “withoug configuration� I do not understand what you meant.
>>>> Here's an example:
>>>>
>>>> C ------ A ------ S
>>>>
>>>> If both C and S support DOIC, there is no way for them to tell whether A supports DOIC. Consider two cases:
>>>>
>>>> 1) A supports DOIC. But since C already inserts OC-S-F in all requests, and S inserts it in all answers, A passes them through unchanged.
>>>> 2) A does not support DOIC, but passes through unknown AVPs. Since OC-S-F will be unknown to it, it passes it through unchanged.
>>>>
>>>>  From the perspective of C and S, the requests and answers look identical for both cases. Even if A actually changes the content of an OC-S-F avp, neither endpoint can tell if the resulting AVP came from A or the opposite endpoint.
>>>>
>>>> Personally, I think this is a showstopper. But the working group consensus did not agree.
>>>>
>>>> [MCruz] Several comments:
>>>> a) Then you consider this requirement as "partly compliant" since you consider configuration is required in a node to identify whether or not its adjacent peers support DOIC, right? If so, could you explain why a node needs to know whether or not the peer support DOIC, a part from what is included in the advertisement mechanism we defined?
>>> If you do not know that a peer supports DOIC, you cannot assume that it will enforce DOIC related policies (I believe that is sufficiently described in the security configurations.)
>>>
>>>> b) What do you think is a "show stopper"? The need for configuration?
>>> Explicitly, the need to configure whether you can trust a peer to enforce DOIC related polices. I believe this is an important security issue, and that being unable to determine it automatically is a real problem. Requiring this sort of configuration doesn't scale well, and has the potential of creating real management and operations problems. (Note the IETF area that DIME is in.)
>>>
>>> But, as I said, the working group seems to have chosen to move forward without an automatic way to do this. Perhaps it can be improved in a future extension.
>>>
>>>>
>>>>>    REQ 23: The solution MUST provide sufficient information to enable a
>>>>>            load-balancing node to divert messages that are rejected or
>>>>>            otherwise throttled by an overloaded upstream node to other
>>>>>            upstream nodes that are the most likely to have sufficient
>>>>>            capacity to process them.
>>>>>
>>>>>            *Not Compliant*. DOIC provides no built in mechanism to
>>>>>            determine the best place to divert messages that would
>>>>>            otherwise be throttled.  This can be accomplished with a
>>>>>            future "load" extension, or with proprietary load balancing
>>>>>            mechanisms.
>>>>>
>>>>> [MCruz] Partly Compliant. DOIC Overload information can be used already by proprietary load-balancing implementations.
>>>>>
>>>>> Load information will be a plus to this.
>>>>>
>>>> I disagree, or at least think that would be _very_ partial. You won't have any overload information unless the potential diversion targets are also overloaded.
>>>> [MCruz] In case servers in the pools are DOIC enabled the Overload information is provided by all of them, under overload occurrences, then this information is valid (maybe not sufficient in all cases, I agree, but valid in most of them) to divert.
>>>> In case we have mixed servers (DOIC-supporting and non-DOIC) we have some limitations as well.
>>> The purpose behind this requirement was to allow load balancing of requests that are diverted to (hopefully) non-overloaded servers, in a way that reduces the chance of causing those servers to also become overloaded. Those servers will not be providing OLRs.
>>>
>>> I still do not agree that the corner case of diverting request to _overloaded_ servers is big enough to consider this partially compliant.
>>>
>>>>>    REQ 30: The solution MUST NOT interfere with any Diameter-compliant
>>>>>            method that a node may use to protect itself from overload
>>>>>            from non-supporting nodes or from denial-of-service attacks.
>>>>>
>>>>>            *Compliant*. The specification recommends that any such
>>>>>            protection mechanism needed without DOIC should continue to
>>>>>            be employed with DOIC.
>>>>> [MCruz] Could you point our where in the draft it is described?
>>>> 9.3
>>>> [MCruz] I do not think 9.3 says what you mentioned here.
>>>> It says "In the absence of an overload control mechanism...". It is not said the DOIC shall not interfere with any other Diameter method for protection, we may need to add this information to the draft in fact.
>>>> A part from that, I think 9.3. should say "for non-DOIC supporting nodes/networks..." not just "in the absence of _an_ overload control mechanism"...
>>> The "absence of an OC strategy" part is there to provide the context that these protection mechanisms existed, or needed to exist, prior to the availability of DOIC. The section goes on to say that, even with DOIC, these protections are still needed to deal with non-compliant nodes.
>>>
>>> Are you arguing that we don't comply with Req 30? (Keeping in mind that this text is to be removed from the RFC.)
>>>
>>>>
>>>>
>>>>
>>>> /Ben.
>>>>
>>>> _______________________________________________
>>>> DiME mailing list
>>>> DiME@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/dime
>>> _______________________________________________
>>> DiME mailing list
>>> DiME@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dime
>> _______________________________________________
>> DiME mailing list
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
>


From nobody Tue Jan 20 13:07:23 2015
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From: Ben Campbell 
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To: "Wiehe, Ulrich (NSN - DE/Munich)" 
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Subject: Re: [Dime] Diameter load control inputs
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> On Jan 14, 2015, at 4:38 AM, Wiehe, Ulrich (NSN - DE/Munich) =
 wrote:
>=20
> Hi Jean-Jacques,
> =20
> I would like to limit Diameter load control to server  (host) load and =
realm load in a first step and leave agent load for a second step.
> We nearly have completed Diameter Overload control which is limited to =
server (host) overload and realm overload, while the agent overload =
draft  is not complete.
> =20
> Once Agent Overload control is stable we may consider extending it =
with agent load control.

I don't agree. The purpose of load information is very different than =
that of overload. My initial instinct (which may change as we delve =
deeper) is the simplest way to handle "load" is on a peer-to-peer basis, =
and that the load info sent by a node is only used by immediate peers of =
the node. This model does not require differentiation between agents and =
servers.

This does not fully handle all of JJacque's cases, where for example the =
client's choice of agent effects the available servers. But nothing =
prevents an agent from considering, and possibly aggregating, load info =
from upstream peers into the load value it sends downstream for itself. =
But I'm not sure that sort of behavior requires standardization on our =
part.


> =20
> Best regards
> Ulrich
>=20


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Subject: Re: [Dime] WLGC #2 for draft-ietf-dime-ovli-06
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On 1/20/15 1:20 PM, Ben Campbell wrote:
>> On Jan 20, 2015, at 12:42 PM, Steve Donovan  wrote:
>>
>> The following is the resolution of Ben's issues that were not addressed directly in an email thread started by Ulrich.
>>
>> Regards,
>>
>> Steve
>>
>>> -- 5.3, 4th paragraph:
>>>
>>> As I mentioned in previous discussion, after re-reading the related text in 6733, it's no longer clear to me this works like we thought it did. That is, I think any attempt to make sub-AVPs mandatory risks causing errors in the enclosing Diameter transaction. I don't know how to solve this, other just disallowing mandatory sub-AVPs. (Jouni previously convinced me 6733 treatment of the m-bit in sub-avps worked like we wanted--perhaps he can re-convince me :-)
>>>
>> SRD>Given that Jouni successfully convinced Ben about the 6733 treatment, I'm not planning to make any changes, as I'm assuming he can be just as successful the second time.
> I think that's a bad assumption.
>
> We had previously assumed that if a node receives a grouped AVP (without the m-bit set) that includes an unrecognized sub-avp with the m-bit set, then the receiver could just ignore the entire grouped AVP, and otherwise process the transaction. But 6733 actually says the following:
>
> "Receivers of a Grouped AVP that
>     does not have the 'M' (mandatory) bit set and one or more of the
>     encapsulated AVPs within the group has the 'M' (mandatory) bit set
>     MAY simply be ignored if the Grouped AVP itself is unrecognized.  The
>     rule applies even if the encapsulated AVP with its 'M' (mandatory)
>     bit set is further encapsulated within other sub-groups, i.e., other
>     Grouped AVPs embedded within the Grouped AVP."
>
> Note the "... if the Grouped AVP itself is unrecognized." clause.
>
> The case we have in mind is when you receive a _recognized_ grouped AVP (that is, you implement DOIC), but it includes an unrecognized sub-avp with the M-bit set. This is not covered by the exception. This would seem to indicate that the entire request must fail. I don't think that's what we want.
SRD> I see how it could be interpreted that way.
>
> At this point, I think we need to either say that sub-avps of DOIC grouped AVPs either 1) MUST NOT have the m-bit set, or 2) MUST NOT have the m-bit set unless the sub-avp is part of an extension explicitly negotiated in the feature vector.
SRD> I'm ok either way but prefer number 2).
>
>
>
[...]
>>> Paragraph 5:
>>>
>>> Is this redundant to the last paragraph of 5.2.2?
>>>
>> SRD> I don't see an issue.  One is general and the other specific to the loss algorithm.  They don't conflict.
> The one in 5.2.2 is specific to situations where an OLR quenches all requests, and says MUST. So is this, and says RECOMMENDED (which means SHOULD in 2119).
SRD>Actually 5.2.2 isn't only about quenching.  It's also about the 
reacting node having sent no traffic, because it had no traffic to send, 
and now needs to send traffic soon after the OCS expires. The reporting 
node might still be in an overload state but the reacting node doesn't 
know until the first request is sent.
>
> If the idea is that the text in 6.3 is the recommended way to fulfill the MUST in 5.2.2, then that's okay I guess (although I would prefer one of the two to be non-normative.)
SRD> 6.3 deals specifically with quenching, thus is a little different 
than 5.2.2, although there is overlap.
>
> Another approach would to leave this to 6.3, and add something to the effect that any new algorithm that can cause total quenching of requests must address how the reacting node restarts from that state.
SRD> I prefer to leave it as it currently is.
>
> [...]


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Archived-At: 
Subject: Re: [Dime] Diameter load control inputs
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I also disagree with the suggestion that load for agents be separated 
out.  The reason agent overload was separated was to optimize work to 
get it done in time for release 12.  We have no such schedule constraint 
for load.

Steve

On 1/20/15 3:07 PM, Ben Campbell wrote:
>> On Jan 14, 2015, at 4:38 AM, Wiehe, Ulrich (NSN - DE/Munich)  wrote:
>>
>> Hi Jean-Jacques,
>>   
>> I would like to limit Diameter load control to server  (host) load and realm load in a first step and leave agent load for a second step.
>> We nearly have completed Diameter Overload control which is limited to server (host) overload and realm overload, while the agent overload draft  is not complete.
>>   
>> Once Agent Overload control is stable we may consider extending it with agent load control.
> I don't agree. The purpose of load information is very different than that of overload. My initial instinct (which may change as we delve deeper) is the simplest way to handle "load" is on a peer-to-peer basis, and that the load info sent by a node is only used by immediate peers of the node. This model does not require differentiation between agents and servers.
>
> This does not fully handle all of JJacque's cases, where for example the client's choice of agent effects the available servers. But nothing prevents an agent from considering, and possibly aggregating, load info from upstream peers into the load value it sends downstream for itself. But I'm not sure that sort of behavior requires standardization on our part.
>
>
>>   
>> Best regards
>> Ulrich
>>
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime
>


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From: "Wiehe, Ulrich (NSN - DE/Munich)" 
To: ext Steve Donovan , ext Ben Campbell 
Thread-Topic: [Dime] Ben's comments on 4.3, third paragraph from end
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Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
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Steve,
I'm not sure.
My understanding is:
1. Two answer messages (with same application id) sent by a reporting node =
while not in an overload condition can have different selected overload aba=
tement algorithms in the OC-Feature-Vector AVP.
2. Two answer messages (with same application id) sent by a reporting node =
while in an (the same) overload condition must have the same selected overl=
oad abatement algorithm in the OC-Feature-Vector AVP if the two sets A and =
B are identical, where A is the intersection of the set of advertized algor=
ithms received in the request that corresponds to the one answer message wi=
th the set of algorithms that are supported (at the time the one answer mes=
sage is sent) by the reporting node, and B is the intersection of the set o=
f advertized algorithms received in the request that corresponds to the oth=
er answer message with the set of algorithms that are supported (at the tim=
e the other answer message is sent) by the reporting node; And the set of a=
lgorithms supported by the reporting node must not change during an overloa=
d condition.

This ensures that reacting nodes, while not changing the set of advertized =
algorithms, will not receive a change of the selected algorithm during an o=
verload condition (without the need for the reporting node to keep history =
data).

Ulrich


-----Original Message-----
From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]=20
Sent: Tuesday, January 20, 2015 7:27 PM
To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
Cc: dime@ietf.org
Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end

  I have removed the last sentence in the paragraph in question.  The=20
before and after for the paragraph is as follows:

Before:

    Reporting nodes can change the overload abatement algorithm indicated
    in the OC-Feature-Vector AVP if the reporting node is not currently
    in an overload condition and sending overload reports.  The reporting
    node is not allowed to change the overload abatement algorithm while
    the reporting node is in an overload condition.

After:

    Reporting nodes can change the overload abatement algorithm indicated
    in the OC-Feature-Vector AVP if the reporting node is not currently
    in an overload condition and sending overload reports.

Ulrich,

I'm not sure I understand your point about the assignment of commonly=20
supported algorithms.  Are you ok with this change?

Regards,

Steve
On 1/16/15 4:30 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
> Ben
>
> The Note at the beginning of 5.1 is about change of announced capabilitie=
s in reacting nodes, while the text in 4.2 (and 5.2.1.4) is about change of=
 selected algorithm by reporting nodes.
> I don't think the text in 4.2 (and 5.2.1.4) is totally wrong. Of course, =
if the reacting node changes the set of announced capabilities, the reporti=
ng node may change (or even need to  change) the selected algorithm. What i=
s not allowed to be changed by the reporting node during an overload condit=
ion is the deterministic function that assignes to every set of commonly su=
pported algorithms a distinct selected algorithm.
>
>
> Ulrich
>
>
> -----Original Message-----
> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben Campbell
> Sent: Thursday, January 15, 2015 4:19 PM
> To: Steve Donovan
> Cc: dime@ietf.org
> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>
> Sorry, that was 4.2.
>
>> On Jan 15, 2015, at 7:14 AM, Steve Donovan  wr=
ote:
>>
>> I agree with Ulrich, I don't see the issue.
>>
>>
>> On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>> Ben wrote:
>>> -- 4.3, third paragraph from end:
>>>  =20
>>> This still assumes that reporting nodes cannot change algorithms during=
 overload. I thought we agreed to remove that. (The normative text is also =
still there--see later comment.)
>>>  =20
>>>  I don't understand. In my copy of -06 the third paragraph from=
 end in 4.3 reads:
>>>     Two types of overload abatement treatment are defined, diversion an=
d
>>>     throttling.  Reacting nodes are responsible for determining which
>>>     treatment is appropriate for individual requests.
>>> How does this text assume that reporting nodes cannot change algorithms=
 during overload?
>>>  =20
>>>  =20
>>>
>>>
>>> _______________________________________________
>>> DiME mailing list
>>>
>>> DiME@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dime
>> _______________________________________________
>> DiME mailing list
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime
>


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Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
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On 1/21/15 4:06 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
> Steve,
> I'm not sure.
> My understanding is:
> 1. Two answer messages (with same application id) sent by a reporting node while not in an overload condition can have different selected overload abatement algorithms in the OC-Feature-Vector AVP.

SRD> Correct, one set of answer messages could indicate loss and the 
other rate (for instance).  This would happen if the reporting node 
policy prefers rate but there is a mix of reacting node capabilities.  
In this case where not all reacting nodes support the reporting nodes 
preferred algorithm, the reporting node could also decide to send loss 
to all reacting nodes.

> 2. Two answer messages (with same application id) sent by a reporting node while in an (the same) overload condition must have the same selected overload abatement algorithm in the OC-Feature-Vector AVP if the two sets A and B are identical, where A is the intersection of the set of advertized algorithms received in the request that corresponds to the one answer message with the set of algorithms that are supported (at the time the one answer message is sent) by the reporting node, and B is the intersection of the set of advertized algorithms received in the request that corresponds to the other answer message with the set of algorithms that are supported (at the time the other answer message is sent) by the reporting node; And the set of algorithms supported by the reporting node must not change during an overload condition.

SRD> I'm a little lost in your description here.  It is possible for the 
reporting node be in an overload state and be sending loss reports to 
one set of reacting nodes and rate to a second set of reacting nodes.  
Whether or not the reporting node does this is entirely up to the 
implementation at the reporting node.

>
> This ensures that reacting nodes, while not changing the set of advertized algorithms, will not receive a change of the selected algorithm during an overload condition (without the need for the reporting node to keep history data).

SRD> The algorithm sent by the reporting node will be decided based on a 
combination of the advertised algorithms and policy at the reporting 
node.  If there is some change in policy at the reporting node that 
changes the selection then the reacting node needs to be prepared to 
handle the change.  I think you are suggesting we say this cannot happen 
during an active overload at the reporting node.  Is this correct?

SRD> As things stand now, with the changes made in -06 and the coming 
-07, the reacting node will need to be able to handle a change in 
algorithm during an active overload condition.  What is the benefit of 
changing this?  If the algorithm changes during an overload condition 
the reacting node can just treat it as an end of one overload condition 
and the start of another.
>
> Ulrich
>
>
> -----Original Message-----
> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]
> Sent: Tuesday, January 20, 2015 7:27 PM
> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
> Cc: dime@ietf.org
> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>
>    I have removed the last sentence in the paragraph in question.  The
> before and after for the paragraph is as follows:
>
> Before:
>
>      Reporting nodes can change the overload abatement algorithm indicated
>      in the OC-Feature-Vector AVP if the reporting node is not currently
>      in an overload condition and sending overload reports.  The reporting
>      node is not allowed to change the overload abatement algorithm while
>      the reporting node is in an overload condition.
>
> After:
>
>      Reporting nodes can change the overload abatement algorithm indicated
>      in the OC-Feature-Vector AVP if the reporting node is not currently
>      in an overload condition and sending overload reports.
>
> Ulrich,
>
> I'm not sure I understand your point about the assignment of commonly
> supported algorithms.  Are you ok with this change?
>
> Regards,
>
> Steve
> On 1/16/15 4:30 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>> Ben
>>
>> The Note at the beginning of 5.1 is about change of announced capabilities in reacting nodes, while the text in 4.2 (and 5.2.1.4) is about change of selected algorithm by reporting nodes.
>> I don't think the text in 4.2 (and 5.2.1.4) is totally wrong. Of course, if the reacting node changes the set of announced capabilities, the reporting node may change (or even need to  change) the selected algorithm. What is not allowed to be changed by the reporting node during an overload condition is the deterministic function that assignes to every set of commonly supported algorithms a distinct selected algorithm.
>>
>>
>> Ulrich
>>
>>
>> -----Original Message-----
>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben Campbell
>> Sent: Thursday, January 15, 2015 4:19 PM
>> To: Steve Donovan
>> Cc: dime@ietf.org
>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>
>> Sorry, that was 4.2.
>>
>>> On Jan 15, 2015, at 7:14 AM, Steve Donovan  wrote:
>>>
>>> I agree with Ulrich, I don't see the issue.
>>>
>>>
>>> On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>>> Ben wrote:
>>>> -- 4.3, third paragraph from end:
>>>>    
>>>> This still assumes that reporting nodes cannot change algorithms during overload. I thought we agreed to remove that. (The normative text is also still there--see later comment.)
>>>>    
>>>>  I don't understand. In my copy of -06 the third paragraph from end in 4.3 reads:
>>>>      Two types of overload abatement treatment are defined, diversion and
>>>>      throttling.  Reacting nodes are responsible for determining which
>>>>      treatment is appropriate for individual requests.
>>>> How does this text assume that reporting nodes cannot change algorithms during overload?
>>>>    
>>>>    
>>>>
>>>>
>>>> _______________________________________________
>>>> DiME mailing list
>>>>
>>>> DiME@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/dime
>>> _______________________________________________
>>> DiME mailing list
>>> DiME@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dime
>> _______________________________________________
>> DiME mailing list
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
>>
>


From nobody Wed Jan 21 08:49:59 2015
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Date: Wed, 21 Jan 2015 10:49:54 -0600
From: Steve Donovan 
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Subject: [Dime] Status of DOIC WGLC #2
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All,

I have made preliminary updates to what will become DOIC-07 based on the 
comments received during WGLG #2.

There are currently three open issues, two in the email thread titled 
"WLGC #2 for draft-ietf-dime-ovli-06" and one in the email thread titled 
"Ben's comments on 4.3, third paragraph from end".

Once we have resolution of these three issues I will publish DOIC -07 
and hopefully things will move into IESG review.

If you have opinions on these issues, please respond ASAP so we can move 
this document on.

Regards,

Steve


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From: "Wiehe, Ulrich (NSN - DE/Munich)" 
To: ext Steve Donovan , ext Ben Campbell 
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Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
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Steve,
see inline.
Regards
Ulrich

-----Original Message-----
From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]=20
Sent: Wednesday, January 21, 2015 5:46 PM
To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
Cc: dime@ietf.org
Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end


On 1/21/15 4:06 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
> Steve,
> I'm not sure.
> My understanding is:
> 1. Two answer messages (with same application id) sent by a reporting nod=
e while not in an overload condition can have different selected overload a=
batement algorithms in the OC-Feature-Vector AVP.

SRD> Correct, one set of answer messages could indicate loss and the=20
other rate (for instance).  This would happen if the reporting node=20
policy prefers rate but there is a mix of reacting node capabilities. =20
In this case where not all reacting nodes support the reporting nodes=20
preferred algorithm, the reporting node could also decide to send loss=20
to all reacting nodes.

Ulrich> Although this is right, it does not hit the nail. I should have sai=
d:
1a. Two answer messages (with same application id) sent by a reporting node=
 while in or not in an overload condition can have different selected overl=
oad abatement algorithms in the OC-Feature-Vector AVP when the correspondin=
g request messages advertize different sets of supported algorithms.
1b. Two answer messages (with same application id) sent by a reporting node=
 while not in an overload condition can have different selected overload ab=
atement algorithms in the OC-Feature-Vector AVP even when the corresponding=
 request messages advertize the same set of supported algorithms.
As you say , 1a would happen if there is a mix of reacting node capabilitie=
s. 1b would happen if the policy is changed in the reporting node.

> 2. Two answer messages (with same application id) sent by a reporting nod=
e while in an (the same) overload condition must have the same selected ove=
rload abatement algorithm in the OC-Feature-Vector AVP if the two sets A an=
d B are identical, where A is the intersection of the set of advertized alg=
orithms received in the request that corresponds to the one answer message =
with the set of algorithms that are supported (at the time the one answer m=
essage is sent) by the reporting node, and B is the intersection of the set=
 of advertized algorithms received in the request that corresponds to the o=
ther answer message with the set of algorithms that are supported (at the t=
ime the other answer message is sent) by the reporting node; And the set of=
 algorithms supported by the reporting node must not change during an overl=
oad condition.

SRD> I'm a little lost in your description here.  It is possible for the=20
reporting node be in an overload state and be sending loss reports to=20
one set of reacting nodes and rate to a second set of reacting nodes.

Ulrich> yes, loss to the reacting nodes that advertize loss only and rate t=
o the reacting nodes that advertize rate and loss. If we do not allow this,=
 then a reporting node cannot select rate (although supported by most react=
ing nodes) as long as one reacting node only supports loss.
 =20
Whether or not the reporting node does this is entirely up to the=20
implementation at the reporting node.

Ulrich> it is up to configuration: the reporting node may be configured to =
"select rate when loss and rate is advertized and to select loss when only =
loss is advertized". Alternatively the reporting node may be configured to =
"select loss when loss and rate is advertized and to select loss when only =
loss is advertized".

>
> This ensures that reacting nodes, while not changing the set of advertize=
d algorithms, will not receive a change of the selected algorithm during an=
 overload condition (without the need for the reporting node to keep histor=
y data).

SRD> The algorithm sent by the reporting node will be decided based on a=20
combination of the advertised algorithms and policy at the reporting=20
node.  If there is some change in policy at the reporting node that=20
changes the selection then the reacting node needs to be prepared to=20
handle the change.  I think you are suggesting we say this cannot happen=20
during an active overload at the reporting node.  Is this correct?
=20
Ulrich> yes.=20

SRD> As things stand now, with the changes made in -06 and the coming=20
-07, the reacting node will need to be able to handle a change in=20
algorithm during an active overload condition.  What is the benefit of=20
changing this?  If the algorithm changes during an overload condition=20
the reacting node can just treat it as an end of one overload condition=20
and the start of another.

Ulrich> yes that is possible but adds complexity to the reacting node espec=
ially when changing from a stateless to a stateful algorithm. There may als=
o be issues with the mechanism's stability. During an overload condition re=
porting nodes should not force reacting nodes to change algorithm.
On reflection, reacting nodes that support (and advertize) loss and rate co=
uld - when receiving OLR with loss - stopp advertizing rate as long as the =
overload condition is ongoing in order to prevent change from loss to rate =
during the overload condition. With this trick, the only way of change is t=
owards loss, and that may be acceptable (as it is a one time change and you=
 cannot change back and forth).
>
> Ulrich
>
>
> -----Original Message-----
> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]
> Sent: Tuesday, January 20, 2015 7:27 PM
> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
> Cc: dime@ietf.org
> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>
>    I have removed the last sentence in the paragraph in question.  The
> before and after for the paragraph is as follows:
>
> Before:
>
>      Reporting nodes can change the overload abatement algorithm indicate=
d
>      in the OC-Feature-Vector AVP if the reporting node is not currently
>      in an overload condition and sending overload reports.  The reportin=
g
>      node is not allowed to change the overload abatement algorithm while
>      the reporting node is in an overload condition.
>
> After:
>
>      Reporting nodes can change the overload abatement algorithm indicate=
d
>      in the OC-Feature-Vector AVP if the reporting node is not currently
>      in an overload condition and sending overload reports.
>
> Ulrich,
>
> I'm not sure I understand your point about the assignment of commonly
> supported algorithms.  Are you ok with this change?
>
> Regards,
>
> Steve
> On 1/16/15 4:30 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>> Ben
>>
>> The Note at the beginning of 5.1 is about change of announced capabiliti=
es in reacting nodes, while the text in 4.2 (and 5.2.1.4) is about change o=
f selected algorithm by reporting nodes.
>> I don't think the text in 4.2 (and 5.2.1.4) is totally wrong. Of course,=
 if the reacting node changes the set of announced capabilities, the report=
ing node may change (or even need to  change) the selected algorithm. What =
is not allowed to be changed by the reporting node during an overload condi=
tion is the deterministic function that assignes to every set of commonly s=
upported algorithms a distinct selected algorithm.
>>
>>
>> Ulrich
>>
>>
>> -----Original Message-----
>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben Campbell
>> Sent: Thursday, January 15, 2015 4:19 PM
>> To: Steve Donovan
>> Cc: dime@ietf.org
>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>
>> Sorry, that was 4.2.
>>
>>> On Jan 15, 2015, at 7:14 AM, Steve Donovan  w=
rote:
>>>
>>> I agree with Ulrich, I don't see the issue.
>>>
>>>
>>> On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>>> Ben wrote:
>>>> -- 4.3, third paragraph from end:
>>>>   =20
>>>> This still assumes that reporting nodes cannot change algorithms durin=
g overload. I thought we agreed to remove that. (The normative text is also=
 still there--see later comment.)
>>>>   =20
>>>>  I don't understand. In my copy of -06 the third paragraph fro=
m end in 4.3 reads:
>>>>      Two types of overload abatement treatment are defined, diversion =
and
>>>>      throttling.  Reacting nodes are responsible for determining which
>>>>      treatment is appropriate for individual requests.
>>>> How does this text assume that reporting nodes cannot change algorithm=
s during overload?
>>>>   =20
>>>>   =20
>>>>
>>>>
>>>> _______________________________________________
>>>> DiME mailing list
>>>>
>>>> DiME@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/dime
>>> _______________________________________________
>>> DiME mailing list
>>> DiME@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dime
>> _______________________________________________
>> DiME mailing list
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
>>
>


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Date: Thu, 22 Jan 2015 08:32:24 -0600
From: Steve Donovan 
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Archived-At: 
Cc: "dime@ietf.org" 
Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
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Ulrich,

I agree that the reacting node can do as you say and change what it 
advertises after the start of an overload condition.  Do you agree that 
this does not require any changes to the DOIC spec?  If so, then do you 
agree we can close on this issue?

Regards,

Steve

On 1/22/15 3:37 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
> Steve,
> see inline.
> Regards
> Ulrich
>
> -----Original Message-----
> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]
> Sent: Wednesday, January 21, 2015 5:46 PM
> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
> Cc: dime@ietf.org
> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>
>
> On 1/21/15 4:06 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>> Steve,
>> I'm not sure.
>> My understanding is:
>> 1. Two answer messages (with same application id) sent by a reporting node while not in an overload condition can have different selected overload abatement algorithms in the OC-Feature-Vector AVP.
> SRD> Correct, one set of answer messages could indicate loss and the
> other rate (for instance).  This would happen if the reporting node
> policy prefers rate but there is a mix of reacting node capabilities.
> In this case where not all reacting nodes support the reporting nodes
> preferred algorithm, the reporting node could also decide to send loss
> to all reacting nodes.
>
> Ulrich> Although this is right, it does not hit the nail. I should have said:
> 1a. Two answer messages (with same application id) sent by a reporting node while in or not in an overload condition can have different selected overload abatement algorithms in the OC-Feature-Vector AVP when the corresponding request messages advertize different sets of supported algorithms.
> 1b. Two answer messages (with same application id) sent by a reporting node while not in an overload condition can have different selected overload abatement algorithms in the OC-Feature-Vector AVP even when the corresponding request messages advertize the same set of supported algorithms.
> As you say , 1a would happen if there is a mix of reacting node capabilities. 1b would happen if the policy is changed in the reporting node.
>
>> 2. Two answer messages (with same application id) sent by a reporting node while in an (the same) overload condition must have the same selected overload abatement algorithm in the OC-Feature-Vector AVP if the two sets A and B are identical, where A is the intersection of the set of advertized algorithms received in the request that corresponds to the one answer message with the set of algorithms that are supported (at the time the one answer message is sent) by the reporting node, and B is the intersection of the set of advertized algorithms received in the request that corresponds to the other answer message with the set of algorithms that are supported (at the time the other answer message is sent) by the reporting node; And the set of algorithms supported by the reporting node must not change during an overload condition.
> SRD> I'm a little lost in your description here.  It is possible for the
> reporting node be in an overload state and be sending loss reports to
> one set of reacting nodes and rate to a second set of reacting nodes.
>
> Ulrich> yes, loss to the reacting nodes that advertize loss only and rate to the reacting nodes that advertize rate and loss. If we do not allow this, then a reporting node cannot select rate (although supported by most reacting nodes) as long as one reacting node only supports loss.
>    
> Whether or not the reporting node does this is entirely up to the
> implementation at the reporting node.
>
> Ulrich> it is up to configuration: the reporting node may be configured to "select rate when loss and rate is advertized and to select loss when only loss is advertized". Alternatively the reporting node may be configured to "select loss when loss and rate is advertized and to select loss when only loss is advertized".
>
>> This ensures that reacting nodes, while not changing the set of advertized algorithms, will not receive a change of the selected algorithm during an overload condition (without the need for the reporting node to keep history data).
> SRD> The algorithm sent by the reporting node will be decided based on a
> combination of the advertised algorithms and policy at the reporting
> node.  If there is some change in policy at the reporting node that
> changes the selection then the reacting node needs to be prepared to
> handle the change.  I think you are suggesting we say this cannot happen
> during an active overload at the reporting node.  Is this correct?
>   
> Ulrich> yes.
>
> SRD> As things stand now, with the changes made in -06 and the coming
> -07, the reacting node will need to be able to handle a change in
> algorithm during an active overload condition.  What is the benefit of
> changing this?  If the algorithm changes during an overload condition
> the reacting node can just treat it as an end of one overload condition
> and the start of another.
>
> Ulrich> yes that is possible but adds complexity to the reacting node especially when changing from a stateless to a stateful algorithm. There may also be issues with the mechanism's stability. During an overload condition reporting nodes should not force reacting nodes to change algorithm.
> On reflection, reacting nodes that support (and advertize) loss and rate could - when receiving OLR with loss - stopp advertizing rate as long as the overload condition is ongoing in order to prevent change from loss to rate during the overload condition. With this trick, the only way of change is towards loss, and that may be acceptable (as it is a one time change and you cannot change back and forth).
>> Ulrich
>>
>>
>> -----Original Message-----
>> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]
>> Sent: Tuesday, January 20, 2015 7:27 PM
>> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
>> Cc: dime@ietf.org
>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>
>>     I have removed the last sentence in the paragraph in question.  The
>> before and after for the paragraph is as follows:
>>
>> Before:
>>
>>       Reporting nodes can change the overload abatement algorithm indicated
>>       in the OC-Feature-Vector AVP if the reporting node is not currently
>>       in an overload condition and sending overload reports.  The reporting
>>       node is not allowed to change the overload abatement algorithm while
>>       the reporting node is in an overload condition.
>>
>> After:
>>
>>       Reporting nodes can change the overload abatement algorithm indicated
>>       in the OC-Feature-Vector AVP if the reporting node is not currently
>>       in an overload condition and sending overload reports.
>>
>> Ulrich,
>>
>> I'm not sure I understand your point about the assignment of commonly
>> supported algorithms.  Are you ok with this change?
>>
>> Regards,
>>
>> Steve
>> On 1/16/15 4:30 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>> Ben
>>>
>>> The Note at the beginning of 5.1 is about change of announced capabilities in reacting nodes, while the text in 4.2 (and 5.2.1.4) is about change of selected algorithm by reporting nodes.
>>> I don't think the text in 4.2 (and 5.2.1.4) is totally wrong. Of course, if the reacting node changes the set of announced capabilities, the reporting node may change (or even need to  change) the selected algorithm. What is not allowed to be changed by the reporting node during an overload condition is the deterministic function that assignes to every set of commonly supported algorithms a distinct selected algorithm.
>>>
>>>
>>> Ulrich
>>>
>>>
>>> -----Original Message-----
>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben Campbell
>>> Sent: Thursday, January 15, 2015 4:19 PM
>>> To: Steve Donovan
>>> Cc: dime@ietf.org
>>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>>
>>> Sorry, that was 4.2.
>>>
>>>> On Jan 15, 2015, at 7:14 AM, Steve Donovan  wrote:
>>>>
>>>> I agree with Ulrich, I don't see the issue.
>>>>
>>>>
>>>> On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>>>> Ben wrote:
>>>>> -- 4.3, third paragraph from end:
>>>>>     
>>>>> This still assumes that reporting nodes cannot change algorithms during overload. I thought we agreed to remove that. (The normative text is also still there--see later comment.)
>>>>>     
>>>>>  I don't understand. In my copy of -06 the third paragraph from end in 4.3 reads:
>>>>>       Two types of overload abatement treatment are defined, diversion and
>>>>>       throttling.  Reacting nodes are responsible for determining which
>>>>>       treatment is appropriate for individual requests.
>>>>> How does this text assume that reporting nodes cannot change algorithms during overload?
>>>>>     
>>>>>     
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> DiME mailing list
>>>>>
>>>>> DiME@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/dime
>>>> _______________________________________________
>>>> DiME mailing list
>>>> DiME@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/dime
>>> _______________________________________________
>>> DiME mailing list
>>> DiME@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dime
>>>
>


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Date: Thu, 22 Jan 2015 08:38:24 -0600
From: Steve Donovan 
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Subject: Re: [Dime] WLGC #2 for draft-ietf-dime-ovli-06
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All,

We need to close these two issues to finish WGLC #2.

Please review an let me know if the alternatives I have outlined below 
are acceptable.

Thanks,

Steve

On 1/20/15 3:08 PM, Steve Donovan wrote:
>
> On 1/20/15 1:20 PM, Ben Campbell wrote:
>>> On Jan 20, 2015, at 12:42 PM, Steve Donovan 
>>>  wrote:
>>>
>>> The following is the resolution of Ben's issues that were not 
>>> addressed directly in an email thread started by Ulrich.
>>>
>>> Regards,
>>>
>>> Steve
>>>
>>>> -- 5.3, 4th paragraph:
>>>>
>>>> As I mentioned in previous discussion, after re-reading the related 
>>>> text in 6733, it's no longer clear to me this works like we thought 
>>>> it did. That is, I think any attempt to make sub-AVPs mandatory 
>>>> risks causing errors in the enclosing Diameter transaction. I don't 
>>>> know how to solve this, other just disallowing mandatory sub-AVPs. 
>>>> (Jouni previously convinced me 6733 treatment of the m-bit in 
>>>> sub-avps worked like we wanted--perhaps he can re-convince me :-)
>>>>
>>> SRD>Given that Jouni successfully convinced Ben about the 6733 
>>> treatment, I'm not planning to make any changes, as I'm assuming he 
>>> can be just as successful the second time.
>> I think that's a bad assumption.
>>
>> We had previously assumed that if a node receives a grouped AVP 
>> (without the m-bit set) that includes an unrecognized sub-avp with 
>> the m-bit set, then the receiver could just ignore the entire grouped 
>> AVP, and otherwise process the transaction. But 6733 actually says 
>> the following:
>>
>> "Receivers of a Grouped AVP that
>>     does not have the 'M' (mandatory) bit set and one or more of the
>>     encapsulated AVPs within the group has the 'M' (mandatory) bit set
>>     MAY simply be ignored if the Grouped AVP itself is unrecognized.  
>> The
>>     rule applies even if the encapsulated AVP with its 'M' (mandatory)
>>     bit set is further encapsulated within other sub-groups, i.e., other
>>     Grouped AVPs embedded within the Grouped AVP."
>>
>> Note the "... if the Grouped AVP itself is unrecognized." clause.
>>
>> The case we have in mind is when you receive a _recognized_ grouped 
>> AVP (that is, you implement DOIC), but it includes an unrecognized 
>> sub-avp with the M-bit set. This is not covered by the exception. 
>> This would seem to indicate that the entire request must fail. I 
>> don't think that's what we want.
> SRD> I see how it could be interpreted that way.
>>
>> At this point, I think we need to either say that sub-avps of DOIC 
>> grouped AVPs either 1) MUST NOT have the m-bit set, or 2) MUST NOT 
>> have the m-bit set unless the sub-avp is part of an extension 
>> explicitly negotiated in the feature vector.
> SRD> I'm ok either way but prefer number 2).
>>
>>
>>
> [...]
>>>> Paragraph 5:
>>>>
>>>> Is this redundant to the last paragraph of 5.2.2?
>>>>
>>> SRD> I don't see an issue.  One is general and the other specific to 
>>> the loss algorithm.  They don't conflict.
>> The one in 5.2.2 is specific to situations where an OLR quenches all 
>> requests, and says MUST. So is this, and says RECOMMENDED (which 
>> means SHOULD in 2119).
> SRD>Actually 5.2.2 isn't only about quenching.  It's also about the 
> reacting node having sent no traffic, because it had no traffic to 
> send, and now needs to send traffic soon after the OCS expires. The 
> reporting node might still be in an overload state but the reacting 
> node doesn't know until the first request is sent.
>>
>> If the idea is that the text in 6.3 is the recommended way to fulfill 
>> the MUST in 5.2.2, then that's okay I guess (although I would prefer 
>> one of the two to be non-normative.)
> SRD> 6.3 deals specifically with quenching, thus is a little different 
> than 5.2.2, although there is overlap.
>>
>> Another approach would to leave this to 6.3, and add something to the 
>> effect that any new algorithm that can cause total quenching of 
>> requests must address how the reacting node restarts from that state.
> SRD> I prefer to leave it as it currently is.
>>
>> [...]
>
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime
>


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From: Maria Cruz Bartolome 
To: Steve Donovan , "dime@ietf.org" 
Thread-Topic: [Dime] WLGC #2 for draft-ietf-dime-ovli-06
Thread-Index: AQHQNlEZTlYSoZcWBECTDxIlmAHYi5zMTqew
Date: Thu, 22 Jan 2015 16:41:48 +0000
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References: <54B5399D.3020600@gmail.com>  <54BEA19E.80309@usdonovans.com> <444F5015-38E2-4D19-A5F8-EBC32BAD38F6@nostrum.com> <54BEC3E7.40703@usdonovans.com> <54C10B60.7010405@usdonovans.com>
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Subject: Re: [Dime] WLGC #2 for draft-ietf-dime-ovli-06
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Dear all,

A) About 'M' bit:

My understanding of RFC6733:

      The 'M' bit, known as the Mandatory bit, indicates whether the
      receiver of the AVP MUST parse and understand the semantics of the
      AVP including its content.  The receiving entity MUST return an
      appropriate error message if it receives an AVP that has the M-bit
      set but does not understand it.  An exception applies when the AVP
      is embedded within a Grouped AVP.  See Section 4.4 for details.

       4.4:
   Receivers of a Grouped AVP that
   does not have the 'M' (mandatory) bit set and one or more of the
   encapsulated AVPs within the group has the 'M' (mandatory) bit set
   MAY simply be ignored if the Grouped AVP itself is unrecognized.  The
   rule applies even if the encapsulated AVP with its 'M' (mandatory)
   bit set is further encapsulated within other sub-groups, i.e., other
   Grouped AVPs embedded within the Grouped AVP.


If the Grouped AVP does not have the 'M' bit set, but one (or more) of its =
sub-AVPs do have it, then the grouped AVP may be ignored (instead of sendin=
g an error) if the Grouped AVP itself is "unrecognized"
But what "unrecognized" mean in this context? In my opinion, the grouped AV=
P is not recognized as long as mandatory sub-AVPs are missed, this includes=
 conditionally mandatory (up to negotiation) sub AVPs.
Then I would proposed a variant to your proposal 2 below:

3) sub-AVPs of DOIC grouped AVPs MUST NOT  have the m-bit set unless the su=
b-avp is mandatory or conditionally mandatory (i.e. part of an extension ex=
plicitly negotiated in the feature vector).


B) Going out of 100% reduction

I think we should keep 5.2.2 as it is.
But I think there is a bit of misalignment with 6.3. I will propose followi=
ng rephrasing:

Now: 5th paragraph:

   If reacting node comes out of the 100 percent traffic reduction as a
   result of the overload report timing out, the following procedures
   are RECOMMENDED to be applied.  The reacting node sending the traffic
   should be conservative and, for example, first send "probe" messages
   to learn the overload condition of the overloaded node before
   converging to any traffic amount/rate decided by the sender.  Similar
   concerns apply in all cases when the overload report times out unless
   the previous overload report stated 0 percent reduction.

Proposed: 5th paragraph:

   If reacting node comes out of the 100 percent traffic reduction as a
   result of the overload report timing out,					<--
                                                                the reactin=
g node sending the traffic	<--
   SHOULD be conservative and, for example, first send "probe" messages	<--
   to learn the overload condition of the overloaded node before
   converging to any traffic amount/rate decided by the sender.  Similar
   concerns apply in all cases when the overload report times out unless
   the previous overload report stated 0 percent reduction.


Best regards
/MCruz

-----Original Message-----
From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of Steve Donovan
Sent: jueves, 22 de enero de 2015 15:38
To: dime@ietf.org
Subject: Re: [Dime] WLGC #2 for draft-ietf-dime-ovli-06

All,

We need to close these two issues to finish WGLC #2.

Please review an let me know if the alternatives I have outlined below are =
acceptable.

Thanks,

Steve

On 1/20/15 3:08 PM, Steve Donovan wrote:
>
> On 1/20/15 1:20 PM, Ben Campbell wrote:
>>> On Jan 20, 2015, at 12:42 PM, Steve Donovan=20
>>>  wrote:
>>>
>>> The following is the resolution of Ben's issues that were not=20
>>> addressed directly in an email thread started by Ulrich.
>>>
>>> Regards,
>>>
>>> Steve
>>>
>>>> -- 5.3, 4th paragraph:
>>>>
>>>> As I mentioned in previous discussion, after re-reading the related=20
>>>> text in 6733, it's no longer clear to me this works like we thought=20
>>>> it did. That is, I think any attempt to make sub-AVPs mandatory=20
>>>> risks causing errors in the enclosing Diameter transaction. I don't=20
>>>> know how to solve this, other just disallowing mandatory sub-AVPs.
>>>> (Jouni previously convinced me 6733 treatment of the m-bit in=20
>>>> sub-avps worked like we wanted--perhaps he can re-convince me :-)
>>>>
>>> SRD>Given that Jouni successfully convinced Ben about the 6733
>>> treatment, I'm not planning to make any changes, as I'm assuming he=20
>>> can be just as successful the second time.
>> I think that's a bad assumption.
>>
>> We had previously assumed that if a node receives a grouped AVP=20
>> (without the m-bit set) that includes an unrecognized sub-avp with=20
>> the m-bit set, then the receiver could just ignore the entire grouped=20
>> AVP, and otherwise process the transaction. But 6733 actually says=20
>> the following:
>>
>> "Receivers of a Grouped AVP that
>>     does not have the 'M' (mandatory) bit set and one or more of the
>>     encapsulated AVPs within the group has the 'M' (mandatory) bit set
>>     MAY simply be ignored if the Grouped AVP itself is unrecognized. =20
>> The
>>     rule applies even if the encapsulated AVP with its 'M' (mandatory)
>>     bit set is further encapsulated within other sub-groups, i.e., other
>>     Grouped AVPs embedded within the Grouped AVP."
>>
>> Note the "... if the Grouped AVP itself is unrecognized." clause.
>>
>> The case we have in mind is when you receive a _recognized_ grouped=20
>> AVP (that is, you implement DOIC), but it includes an unrecognized=20
>> sub-avp with the M-bit set. This is not covered by the exception.
>> This would seem to indicate that the entire request must fail. I=20
>> don't think that's what we want.
> SRD> I see how it could be interpreted that way.
>>
>> At this point, I think we need to either say that sub-avps of DOIC=20
>> grouped AVPs either 1) MUST NOT have the m-bit set, or 2) MUST NOT=20
>> have the m-bit set unless the sub-avp is part of an extension=20
>> explicitly negotiated in the feature vector.
> SRD> I'm ok either way but prefer number 2).
>>
>>
>>
> [...]
>>>> Paragraph 5:
>>>>
>>>> Is this redundant to the last paragraph of 5.2.2?
>>>>
>>> SRD> I don't see an issue.  One is general and the other specific to
>>> the loss algorithm.  They don't conflict.
>> The one in 5.2.2 is specific to situations where an OLR quenches all=20
>> requests, and says MUST. So is this, and says RECOMMENDED (which=20
>> means SHOULD in 2119).
> SRD>Actually 5.2.2 isn't only about quenching.  It's also about the
> reacting node having sent no traffic, because it had no traffic to=20
> send, and now needs to send traffic soon after the OCS expires. The=20
> reporting node might still be in an overload state but the reacting=20
> node doesn't know until the first request is sent.
>>
>> If the idea is that the text in 6.3 is the recommended way to fulfill=20
>> the MUST in 5.2.2, then that's okay I guess (although I would prefer=20
>> one of the two to be non-normative.)
> SRD> 6.3 deals specifically with quenching, thus is a little different
> than 5.2.2, although there is overlap.
>>
>> Another approach would to leave this to 6.3, and add something to the=20
>> effect that any new algorithm that can cause total quenching of=20
>> requests must address how the reacting node restarts from that state.
> SRD> I prefer to leave it as it currently is.
>>
>> [...]
>
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime
>

_______________________________________________
DiME mailing list
DiME@ietf.org
https://www.ietf.org/mailman/listinfo/dime


From nobody Thu Jan 22 09:15:33 2015
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From: Maria Cruz Bartolome 
To: Steve Donovan , "Wiehe, Ulrich (NSN - DE/Munich)" , ext Ben Campbell 
Thread-Topic: [Dime] Ben's comments on 4.3, third paragraph from end
Thread-Index: AQHQNlBGzOV7Uxc/eUSNU2ZKJeskz5zMX/yw
Date: Thu, 22 Jan 2015 17:12:42 +0000
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References: <5BCBA1FC2B7F0B4C9D935572D90006681523F07F@DEMUMBX014.nsn-intra.net> <54B7BD25.4040103@usdonovans.com> <5BC32AB7-6DA7-4B27-90E6-40203B3C35D2@nostrum.com> <5BCBA1FC2B7F0B4C9D935572D90006681523F249@DEMUMBX014.nsn-intra.net> <54BE9E0A.7040307@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D90006681523F884@DEMUMBX014.nsn-intra.net> <54BFD7B5.30605@usdonovans.com> <5BCBA1FC2B7F0B4C9D935572D90006681523FAB3@DEMUMBX014.nsn-intra.net> <54C109F8.2070201@usdonovans.com>
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Archived-At: 
Cc: "dime@ietf.org" 
Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
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Ulrich, Steve,

Not sure closing the issue would mean some rephrasing or you have agreed it=
 is not needed.

Anyway, the last sentence in this paragraph, is saying the same as first pa=
rt:

4.2, 3rd paragraph from the end:

   Reporting nodes can change the overload abatement algorithm indicated
   in the OC-Feature-Vector AVP if the reporting node is not currently
   in an overload condition and sending overload reports.  The reporting
   node is not allowed to change the overload abatement algorithm while
   the reporting node is in an overload condition.


Best regards
/MCruz

-----Original Message-----
From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of Steve Donovan
Sent: jueves, 22 de enero de 2015 15:32
To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
Cc: dime@ietf.org
Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end

Ulrich,

I agree that the reacting node can do as you say and change what it adverti=
ses after the start of an overload condition.  Do you agree that this does =
not require any changes to the DOIC spec?  If so, then do you agree we can =
close on this issue?

Regards,

Steve

On 1/22/15 3:37 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
> Steve,
> see inline.
> Regards
> Ulrich
>
> -----Original Message-----
> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]
> Sent: Wednesday, January 21, 2015 5:46 PM
> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
> Cc: dime@ietf.org
> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>
>
> On 1/21/15 4:06 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>> Steve,
>> I'm not sure.
>> My understanding is:
>> 1. Two answer messages (with same application id) sent by a reporting no=
de while not in an overload condition can have different selected overload =
abatement algorithms in the OC-Feature-Vector AVP.
> SRD> Correct, one set of answer messages could indicate loss and the
> other rate (for instance).  This would happen if the reporting node=20
> policy prefers rate but there is a mix of reacting node capabilities.
> In this case where not all reacting nodes support the reporting nodes=20
> preferred algorithm, the reporting node could also decide to send loss=20
> to all reacting nodes.
>
> Ulrich> Although this is right, it does not hit the nail. I should have s=
aid:
> 1a. Two answer messages (with same application id) sent by a reporting no=
de while in or not in an overload condition can have different selected ove=
rload abatement algorithms in the OC-Feature-Vector AVP when the correspond=
ing request messages advertize different sets of supported algorithms.
> 1b. Two answer messages (with same application id) sent by a reporting no=
de while not in an overload condition can have different selected overload =
abatement algorithms in the OC-Feature-Vector AVP even when the correspondi=
ng request messages advertize the same set of supported algorithms.
> As you say , 1a would happen if there is a mix of reacting node capabilit=
ies. 1b would happen if the policy is changed in the reporting node.
>
>> 2. Two answer messages (with same application id) sent by a reporting no=
de while in an (the same) overload condition must have the same selected ov=
erload abatement algorithm in the OC-Feature-Vector AVP if the two sets A a=
nd B are identical, where A is the intersection of the set of advertized al=
gorithms received in the request that corresponds to the one answer message=
 with the set of algorithms that are supported (at the time the one answer =
message is sent) by the reporting node, and B is the intersection of the se=
t of advertized algorithms received in the request that corresponds to the =
other answer message with the set of algorithms that are supported (at the =
time the other answer message is sent) by the reporting node; And the set o=
f algorithms supported by the reporting node must not change during an over=
load condition.
> SRD> I'm a little lost in your description here.  It is possible for=20
> SRD> the
> reporting node be in an overload state and be sending loss reports to=20
> one set of reacting nodes and rate to a second set of reacting nodes.
>
> Ulrich> yes, loss to the reacting nodes that advertize loss only and rate=
 to the reacting nodes that advertize rate and loss. If we do not allow thi=
s, then a reporting node cannot select rate (although supported by most rea=
cting nodes) as long as one reacting node only supports loss.
>   =20
> Whether or not the reporting node does this is entirely up to the=20
> implementation at the reporting node.
>
> Ulrich> it is up to configuration: the reporting node may be configured t=
o "select rate when loss and rate is advertized and to select loss when onl=
y loss is advertized". Alternatively the reporting node may be configured t=
o "select loss when loss and rate is advertized and to select loss when onl=
y loss is advertized".
>
>> This ensures that reacting nodes, while not changing the set of advertiz=
ed algorithms, will not receive a change of the selected algorithm during a=
n overload condition (without the need for the reporting node to keep histo=
ry data).
> SRD> The algorithm sent by the reporting node will be decided based on=20
> SRD> a
> combination of the advertised algorithms and policy at the reporting=20
> node.  If there is some change in policy at the reporting node that=20
> changes the selection then the reacting node needs to be prepared to=20
> handle the change.  I think you are suggesting we say this cannot=20
> happen during an active overload at the reporting node.  Is this correct?
>  =20
> Ulrich> yes.
>
> SRD> As things stand now, with the changes made in -06 and the coming
> -07, the reacting node will need to be able to handle a change in=20
> algorithm during an active overload condition.  What is the benefit of=20
> changing this?  If the algorithm changes during an overload condition=20
> the reacting node can just treat it as an end of one overload=20
> condition and the start of another.
>
> Ulrich> yes that is possible but adds complexity to the reacting node esp=
ecially when changing from a stateless to a stateful algorithm. There may a=
lso be issues with the mechanism's stability. During an overload condition =
reporting nodes should not force reacting nodes to change algorithm.
> On reflection, reacting nodes that support (and advertize) loss and rate =
could - when receiving OLR with loss - stopp advertizing rate as long as th=
e overload condition is ongoing in order to prevent change from loss to rat=
e during the overload condition. With this trick, the only way of change is=
 towards loss, and that may be acceptable (as it is a one time change and y=
ou cannot change back and forth).
>> Ulrich
>>
>>
>> -----Original Message-----
>> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]
>> Sent: Tuesday, January 20, 2015 7:27 PM
>> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
>> Cc: dime@ietf.org
>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>
>>     I have removed the last sentence in the paragraph in question. =20
>> The before and after for the paragraph is as follows:
>>
>> Before:
>>
>>       Reporting nodes can change the overload abatement algorithm indica=
ted
>>       in the OC-Feature-Vector AVP if the reporting node is not currentl=
y
>>       in an overload condition and sending overload reports.  The report=
ing
>>       node is not allowed to change the overload abatement algorithm whi=
le
>>       the reporting node is in an overload condition.
>>
>> After:
>>
>>       Reporting nodes can change the overload abatement algorithm indica=
ted
>>       in the OC-Feature-Vector AVP if the reporting node is not currentl=
y
>>       in an overload condition and sending overload reports.
>>
>> Ulrich,
>>
>> I'm not sure I understand your point about the assignment of commonly=20
>> supported algorithms.  Are you ok with this change?
>>
>> Regards,
>>
>> Steve
>> On 1/16/15 4:30 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>> Ben
>>>
>>> The Note at the beginning of 5.1 is about change of announced capabilit=
ies in reacting nodes, while the text in 4.2 (and 5.2.1.4) is about change =
of selected algorithm by reporting nodes.
>>> I don't think the text in 4.2 (and 5.2.1.4) is totally wrong. Of course=
, if the reacting node changes the set of announced capabilities, the repor=
ting node may change (or even need to  change) the selected algorithm. What=
 is not allowed to be changed by the reporting node during an overload cond=
ition is the deterministic function that assignes to every set of commonly =
supported algorithms a distinct selected algorithm.
>>>
>>>
>>> Ulrich
>>>
>>>
>>> -----Original Message-----
>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben=20
>>> Campbell
>>> Sent: Thursday, January 15, 2015 4:19 PM
>>> To: Steve Donovan
>>> Cc: dime@ietf.org
>>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>>
>>> Sorry, that was 4.2.
>>>
>>>> On Jan 15, 2015, at 7:14 AM, Steve Donovan  =
wrote:
>>>>
>>>> I agree with Ulrich, I don't see the issue.
>>>>
>>>>
>>>> On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>>>> Ben wrote:
>>>>> -- 4.3, third paragraph from end:
>>>>>    =20
>>>>> This still assumes that reporting nodes cannot change algorithms=20
>>>>> during overload. I thought we agreed to remove that. (The=20
>>>>> normative text is also still there--see later comment.)
>>>>>    =20
>>>>>  I don't understand. In my copy of -06 the third paragraph fr=
om end in 4.3 reads:
>>>>>       Two types of overload abatement treatment are defined, diversio=
n and
>>>>>       throttling.  Reacting nodes are responsible for determining whi=
ch
>>>>>       treatment is appropriate for individual requests.
>>>>> How does this text assume that reporting nodes cannot change algorith=
ms during overload?
>>>>>    =20
>>>>>    =20
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> DiME mailing list
>>>>>
>>>>> DiME@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/dime
>>>> _______________________________________________
>>>> DiME mailing list
>>>> DiME@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/dime
>>> _______________________________________________
>>> DiME mailing list
>>> DiME@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dime
>>>
>

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From: Maria Cruz Bartolome 
To: Steve Donovan , Ben Campbell 
Thread-Topic: [Dime] Updated DOIC Requirements Analysis
Thread-Index: AQHQCFYt6tScBxBsq0iC3L6bres0LpyIv54AgADMHwCAAihrkIA9/tiBgAALhICAAAcWgIAC+acQ
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To: Maria Cruz Bartolome 
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I may recall incorrectly, but I thought we decided the discussion on the mailing list was sufficient record. Does anyone remember something different?

Moving them to an informational draft only helps if we take that to RFC, since drafts expire over time.

On Jan 22, 2015, at 11:24 AM, Maria Cruz Bartolome  wrote:

Dear all,

Yes, we agreed to remove detail statement of compliance from the main draft, but we agreed as well that it was worthy to keep this analysis for further references, even if it was only an informational draft.
What is now the intention?

Thanks
/MCruz

- -----Original Message-----
From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of Steve Donovan
Sent: martes, 20 de enero de 2015 21:56
To: Ben Campbell
Cc: dime@ietf.org
Subject: Re: [Dime] Updated DOIC Requirements Analysis


On 1/20/15 2:30 PM, Ben Campbell wrote:
On Jan 20, 2015, at 12:49 PM, Steve Donovan  wrote:

I'm not currently planning to make any updates to the requirements analysis section as I haven't seen consensus on the need to change anything in the portion that will remain in the document.

If we want to continue to debate the sections that are slated to be removed then I suggest we do that in a separate email thread that is not tied to moving the document out of WGLC.
Isn't this that separate thread?
SRD> Yes, I was thinking in terms of the set of items that needed 
addressing for WGLC.

But in any case, I do not think we need changes to the reqs analysis sections, especially the detail section that we have been directed to remove.
SRD> Cool

Regards,

Steve
On 1/7/15 2:54 PM, Ben Campbell wrote:
(Catching up on older stuff)

Comments inline. But keep in mind that the detailed requirements are to be removed from the RFC, so I'm not sure we need to spend too much time on them. (Only the first discussion point addresses text that is to remain in the RFC.)

Thanks!

Ben.

On Dec 12, 2014, at 2:24 AM, Maria Cruz Bartolome  wrote:

Hello Ben,

See comments below
Thanks
/MCruz

C.2.  Detection of non-supporting Intermediaries

  The DOIC mechanism as currently defined does not allow supporting
  nodes to automatically determine whether OC-Supported-Features or OC-
  OLR AVPs are originated by a peer node, or by a non-peer node and
  sent across a non-supporting peer.  This makes it impossible to
  detect the presence of non-supporting nodes between supporting nodes,
  except by configuration.  The working group determined that such a
  configuration requirement is acceptable.

  This limits full compliance with certain requirements related to the
  limitation of new configuration, deployment in environments with
  mixed support, operating across non-supporting agents, and
  authorization.
[MCruz] I think this paragraph should state what are the limitations
(generally, like you did for rest of them) Morever, since detailed descriptions will be deleted.

The limitations are discussed in the security consideration section. Basically if a node expects an agent to enforce any DOIC related policy (e.g. making sure DOIC avps do not leak to unauthorized nodes), it has to know that the agent itself supports DOIC. Right now it can only know that by having an administrator tell it that (violating the limitation on new configuration), by knowing that all agents in the network support DOIC (violating the mixed support and non-supporting agent requirements.)
[MCruz] Please, include text accordingly then. The text now "certain requirements related to" does not provide an information that anyone could trace easily.
I was explicitly asked by other people (e.g. Lionel) to list the impacted requirements descriptively, rather than by reference, in this section. The "certain requirements related to" are described by the words immediately after that phrase. That is, the requirement to limit new configuration, the requirement to allow deployments with mixed support, and the requirements to authorize who can send and receive overload information.


  REQ 6:  The solution designers SHOULD seek to minimize the amount of
          new configuration required in order to work.  For example, it
          is better to allow peers to advertise or negotiate support
          for the solution, rather than to require that this knowledge
          to be configured at each node.

          *Partially Compliant*. Most DOIC parameters are advertised
          using the DOIC capability announcement mechanism.  However,
          there are some situations where configuration is required.
          For example, a DOIC node detect the fact that a peer may not
          support DOIC when nodes on the other side of the non-
          supporting node do support DOIC without configuration.

[MCruz] Could you clarify last example? “withoug configuration� I do not understand what you meant.
Here's an example:

C ------ A ------ S

If both C and S support DOIC, there is no way for them to tell whether A supports DOIC. Consider two cases:

1) A supports DOIC. But since C already inserts OC-S-F in all requests, and S inserts it in all answers, A passes them through unchanged.
2) A does not support DOIC, but passes through unknown AVPs. Since OC-S-F will be unknown to it, it passes it through unchanged.

- From the perspective of C and S, the requests and answers look identical for both cases. Even if A actually changes the content of an OC-S-F avp, neither endpoint can tell if the resulting AVP came from A or the opposite endpoint.

Personally, I think this is a showstopper. But the working group consensus did not agree.

[MCruz] Several comments:
a) Then you consider this requirement as "partly compliant" since you consider configuration is required in a node to identify whether or not its adjacent peers support DOIC, right? If so, could you explain why a node needs to know whether or not the peer support DOIC, a part from what is included in the advertisement mechanism we defined?
If you do not know that a peer supports DOIC, you cannot assume that it will enforce DOIC related policies (I believe that is sufficiently described in the security configurations.)

b) What do you think is a "show stopper"? The need for configuration?
Explicitly, the need to configure whether you can trust a peer to enforce DOIC related polices. I believe this is an important security issue, and that being unable to determine it automatically is a real problem. Requiring this sort of configuration doesn't scale well, and has the potential of creating real management and operations problems. (Note the IETF area that DIME is in.)

But, as I said, the working group seems to have chosen to move forward without an automatic way to do this. Perhaps it can be improved in a future extension.


  REQ 23: The solution MUST provide sufficient information to enable a
          load-balancing node to divert messages that are rejected or
          otherwise throttled by an overloaded upstream node to other
          upstream nodes that are the most likely to have sufficient
          capacity to process them.

          *Not Compliant*. DOIC provides no built in mechanism to
          determine the best place to divert messages that would
          otherwise be throttled.  This can be accomplished with a
          future "load" extension, or with proprietary load balancing
          mechanisms.

[MCruz] Partly Compliant. DOIC Overload information can be used already by proprietary load-balancing implementations.

Load information will be a plus to this.

I disagree, or at least think that would be _very_ partial. You won't have any overload information unless the potential diversion targets are also overloaded.
[MCruz] In case servers in the pools are DOIC enabled the Overload information is provided by all of them, under overload occurrences, then this information is valid (maybe not sufficient in all cases, I agree, but valid in most of them) to divert.
In case we have mixed servers (DOIC-supporting and non-DOIC) we have some limitations as well.
The purpose behind this requirement was to allow load balancing of requests that are diverted to (hopefully) non-overloaded servers, in a way that reduces the chance of causing those servers to also become overloaded. Those servers will not be providing OLRs.

I still do not agree that the corner case of diverting request to _overloaded_ servers is big enough to consider this partially compliant.

  REQ 30: The solution MUST NOT interfere with any Diameter-compliant
          method that a node may use to protect itself from overload
          from non-supporting nodes or from denial-of-service attacks.

          *Compliant*. The specification recommends that any such
          protection mechanism needed without DOIC should continue to
          be employed with DOIC.
[MCruz] Could you point our where in the draft it is described?
9.3
[MCruz] I do not think 9.3 says what you mentioned here.
It says "In the absence of an overload control mechanism...". It is not said the DOIC shall not interfere with any other Diameter method for protection, we may need to add this information to the draft in fact.
A part from that, I think 9.3. should say "for non-DOIC supporting nodes/networks..." not just "in the absence of _an_ overload control mechanism"...
The "absence of an OC strategy" part is there to provide the context that these protection mechanisms existed, or needed to exist, prior to the availability of DOIC. The section goes on to say that, even with DOIC, these protections are still needed to deal with non-compliant nodes.

Are you arguing that we don't comply with Req 30? (Keeping in mind that this text is to be removed from the RFC.)




/Ben.

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From nobody Thu Jan 22 13:33:54 2015
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To: Maria Cruz Bartolome 
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On Jan 22, 2015, at 10:41 AM, Maria Cruz Bartolome  wrote:

A) About 'M' bit:

My understanding of RFC6733:

     The 'M' bit, known as the Mandatory bit, indicates whether the
     receiver of the AVP MUST parse and understand the semantics of the
     AVP including its content.  The receiving entity MUST return an
     appropriate error message if it receives an AVP that has the M-bit
     set but does not understand it.  An exception applies when the AVP
     is embedded within a Grouped AVP.  See Section 4.4 for details.

      4.4:
  Receivers of a Grouped AVP that
  does not have the 'M' (mandatory) bit set and one or more of the
  encapsulated AVPs within the group has the 'M' (mandatory) bit set
  MAY simply be ignored if the Grouped AVP itself is unrecognized.  The
  rule applies even if the encapsulated AVP with its 'M' (mandatory)
  bit set is further encapsulated within other sub-groups, i.e., other
  Grouped AVPs embedded within the Grouped AVP.


If the Grouped AVP does not have the 'M' bit set, but one (or more) of its sub-AVPs do have it, then the grouped AVP may be ignored (instead of sending an error) if the Grouped AVP itself is "unrecognized"
But what "unrecognized" mean in this context? In my opinion, the grouped AVP is not recognized as long as mandatory sub-AVPs are missed, this includes conditionally mandatory (up to negotiation) sub AVPs.
Then I would proposed a variant to your proposal 2 below:

That's not what "unrecognized" typically means in IETF specs. The common usage is to mean that the recipient doesn't recognize it, or doesn't know what it means. This is  distinct from "malformed" meaning it wasn't constructed correctly.  Missing mandatory sub-AVPs would fall into the "malformed" category, not the "unrecognized" category. .
By definition, a DOIC cannot claim OC-Supported-Features or OC-OLR as unrecognized. 


3) sub-AVPs of DOIC grouped AVPs MUST NOT  have the m-bit set unless the sub-avp is mandatory or conditionally mandatory (i.e. part of an extension explicitly negotiated in the feature vector).

Also, the M-bit doesn't mean the avp is mandatory to be present, just mandatory to be understood. By definition, you can't set the M-bit on an AVP that is not actually there.  (Other things may make it mandatory to be present, such as the feature or application definition, but that still doesn't necessarily mean it's mandatory to understand.) It's also possible that some new feature will involve an AVP that is not there all the time, but mandatory to understand when it is there..


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On Jan 20, 2015, at 3:08 PM, Steve Donovan  wrote:


At this point, I think we need to either say that sub-avps of DOIC grouped AVPs either 1) MUST NOT have the m-bit set, or 2) MUST NOT have the m-bit set unless the sub-avp is part of an extension explicitly negotiated in the feature vector.
SRD> I'm ok either way but prefer number 2).

I'm okay with 2, but it's really a bit redundant. If the AVP is a required-to-understand part of an extension, then negotiating the extension should be sufficient. The M-bit adds no additional semantics.

Basically, we are trying to say "never set the M-bit in a way that could cause a transaction to fail." That means either never setting it, or only setting it if you already know the recipient understands the AVP. Or more to the point, "Never set the M-bit unless the M-bit would be irrelevant anyway".

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To: ext Maria Cruz Bartolome , "Steve Donovan" , ext Ben Campbell 
Thread-Topic: [Dime] Ben's comments on 4.3, third paragraph from end
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Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
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Steve,

I agree with Maria Cruz that the text in -06 is wrong as it says=20

   The reporting node is not allowed to change the overload abatement algor=
ithm while
   the reporting node is in an overload condition.

Also your previously suggested modification

>> Before:
>>
>>       Reporting nodes can change the overload abatement algorithm indica=
ted
>>       in the OC-Feature-Vector AVP if the reporting node is not currentl=
y
>>       in an overload condition and sending overload reports.  The report=
ing
>>       node is not allowed to change the overload abatement algorithm whi=
le
>>       the reporting node is in an overload condition.
>>
>> After:
>>
>>       Reporting nodes can change the overload abatement algorithm indica=
ted
>>       in the OC-Feature-Vector AVP if the reporting node is not currentl=
y
>>       in an overload condition and sending overload reports.

Does not clearly say that reporting nodes are allowed to change algorithm d=
uring an ongoing overload condition.

Also maybe we can add a note to say that during an ongoing overload conditi=
on reacting nodes may chose to stop advertizing support of all algorithms e=
xcept the one selected by the reporting node and loss in order to prevent c=
hange of algorithm (other than towards loss) during an ongoing overload con=
dition. =20

Ulrich

-----Original Message-----
From: ext Maria Cruz Bartolome [mailto:maria.cruz.bartolome@ericsson.com]=20
Sent: Thursday, January 22, 2015 6:13 PM
To: Steve Donovan; Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
Cc: dime@ietf.org
Subject: RE: [Dime] Ben's comments on 4.3, third paragraph from end

Ulrich, Steve,

Not sure closing the issue would mean some rephrasing or you have agreed it=
 is not needed.

Anyway, the last sentence in this paragraph, is saying the same as first pa=
rt:

4.2, 3rd paragraph from the end:

   Reporting nodes can change the overload abatement algorithm indicated
   in the OC-Feature-Vector AVP if the reporting node is not currently
   in an overload condition and sending overload reports.  The reporting
   node is not allowed to change the overload abatement algorithm while
   the reporting node is in an overload condition.


Best regards
/MCruz

-----Original Message-----
From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of Steve Donovan
Sent: jueves, 22 de enero de 2015 15:32
To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
Cc: dime@ietf.org
Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end

Ulrich,

I agree that the reacting node can do as you say and change what it adverti=
ses after the start of an overload condition.  Do you agree that this does =
not require any changes to the DOIC spec?  If so, then do you agree we can =
close on this issue?

Regards,

Steve

On 1/22/15 3:37 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
> Steve,
> see inline.
> Regards
> Ulrich
>
> -----Original Message-----
> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]
> Sent: Wednesday, January 21, 2015 5:46 PM
> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
> Cc: dime@ietf.org
> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>
>
> On 1/21/15 4:06 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>> Steve,
>> I'm not sure.
>> My understanding is:
>> 1. Two answer messages (with same application id) sent by a reporting no=
de while not in an overload condition can have different selected overload =
abatement algorithms in the OC-Feature-Vector AVP.
> SRD> Correct, one set of answer messages could indicate loss and the
> other rate (for instance).  This would happen if the reporting node=20
> policy prefers rate but there is a mix of reacting node capabilities.
> In this case where not all reacting nodes support the reporting nodes=20
> preferred algorithm, the reporting node could also decide to send loss=20
> to all reacting nodes.
>
> Ulrich> Although this is right, it does not hit the nail. I should have s=
aid:
> 1a. Two answer messages (with same application id) sent by a reporting no=
de while in or not in an overload condition can have different selected ove=
rload abatement algorithms in the OC-Feature-Vector AVP when the correspond=
ing request messages advertize different sets of supported algorithms.
> 1b. Two answer messages (with same application id) sent by a reporting no=
de while not in an overload condition can have different selected overload =
abatement algorithms in the OC-Feature-Vector AVP even when the correspondi=
ng request messages advertize the same set of supported algorithms.
> As you say , 1a would happen if there is a mix of reacting node capabilit=
ies. 1b would happen if the policy is changed in the reporting node.
>
>> 2. Two answer messages (with same application id) sent by a reporting no=
de while in an (the same) overload condition must have the same selected ov=
erload abatement algorithm in the OC-Feature-Vector AVP if the two sets A a=
nd B are identical, where A is the intersection of the set of advertized al=
gorithms received in the request that corresponds to the one answer message=
 with the set of algorithms that are supported (at the time the one answer =
message is sent) by the reporting node, and B is the intersection of the se=
t of advertized algorithms received in the request that corresponds to the =
other answer message with the set of algorithms that are supported (at the =
time the other answer message is sent) by the reporting node; And the set o=
f algorithms supported by the reporting node must not change during an over=
load condition.
> SRD> I'm a little lost in your description here.  It is possible for=20
> SRD> the
> reporting node be in an overload state and be sending loss reports to=20
> one set of reacting nodes and rate to a second set of reacting nodes.
>
> Ulrich> yes, loss to the reacting nodes that advertize loss only and rate=
 to the reacting nodes that advertize rate and loss. If we do not allow thi=
s, then a reporting node cannot select rate (although supported by most rea=
cting nodes) as long as one reacting node only supports loss.
>   =20
> Whether or not the reporting node does this is entirely up to the=20
> implementation at the reporting node.
>
> Ulrich> it is up to configuration: the reporting node may be configured t=
o "select rate when loss and rate is advertized and to select loss when onl=
y loss is advertized". Alternatively the reporting node may be configured t=
o "select loss when loss and rate is advertized and to select loss when onl=
y loss is advertized".
>
>> This ensures that reacting nodes, while not changing the set of advertiz=
ed algorithms, will not receive a change of the selected algorithm during a=
n overload condition (without the need for the reporting node to keep histo=
ry data).
> SRD> The algorithm sent by the reporting node will be decided based on=20
> SRD> a
> combination of the advertised algorithms and policy at the reporting=20
> node.  If there is some change in policy at the reporting node that=20
> changes the selection then the reacting node needs to be prepared to=20
> handle the change.  I think you are suggesting we say this cannot=20
> happen during an active overload at the reporting node.  Is this correct?
>  =20
> Ulrich> yes.
>
> SRD> As things stand now, with the changes made in -06 and the coming
> -07, the reacting node will need to be able to handle a change in=20
> algorithm during an active overload condition.  What is the benefit of=20
> changing this?  If the algorithm changes during an overload condition=20
> the reacting node can just treat it as an end of one overload=20
> condition and the start of another.
>
> Ulrich> yes that is possible but adds complexity to the reacting node esp=
ecially when changing from a stateless to a stateful algorithm. There may a=
lso be issues with the mechanism's stability. During an overload condition =
reporting nodes should not force reacting nodes to change algorithm.
> On reflection, reacting nodes that support (and advertize) loss and rate =
could - when receiving OLR with loss - stopp advertizing rate as long as th=
e overload condition is ongoing in order to prevent change from loss to rat=
e during the overload condition. With this trick, the only way of change is=
 towards loss, and that may be acceptable (as it is a one time change and y=
ou cannot change back and forth).
>> Ulrich
>>
>>
>> -----Original Message-----
>> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]
>> Sent: Tuesday, January 20, 2015 7:27 PM
>> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
>> Cc: dime@ietf.org
>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>
>>     I have removed the last sentence in the paragraph in question. =20
>> The before and after for the paragraph is as follows:
>>
>> Before:
>>
>>       Reporting nodes can change the overload abatement algorithm indica=
ted
>>       in the OC-Feature-Vector AVP if the reporting node is not currentl=
y
>>       in an overload condition and sending overload reports.  The report=
ing
>>       node is not allowed to change the overload abatement algorithm whi=
le
>>       the reporting node is in an overload condition.
>>
>> After:
>>
>>       Reporting nodes can change the overload abatement algorithm indica=
ted
>>       in the OC-Feature-Vector AVP if the reporting node is not currentl=
y
>>       in an overload condition and sending overload reports.
>>
>> Ulrich,
>>
>> I'm not sure I understand your point about the assignment of commonly=20
>> supported algorithms.  Are you ok with this change?
>>
>> Regards,
>>
>> Steve
>> On 1/16/15 4:30 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>> Ben
>>>
>>> The Note at the beginning of 5.1 is about change of announced capabilit=
ies in reacting nodes, while the text in 4.2 (and 5.2.1.4) is about change =
of selected algorithm by reporting nodes.
>>> I don't think the text in 4.2 (and 5.2.1.4) is totally wrong. Of course=
, if the reacting node changes the set of announced capabilities, the repor=
ting node may change (or even need to  change) the selected algorithm. What=
 is not allowed to be changed by the reporting node during an overload cond=
ition is the deterministic function that assignes to every set of commonly =
supported algorithms a distinct selected algorithm.
>>>
>>>
>>> Ulrich
>>>
>>>
>>> -----Original Message-----
>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben=20
>>> Campbell
>>> Sent: Thursday, January 15, 2015 4:19 PM
>>> To: Steve Donovan
>>> Cc: dime@ietf.org
>>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>>
>>> Sorry, that was 4.2.
>>>
>>>> On Jan 15, 2015, at 7:14 AM, Steve Donovan  =
wrote:
>>>>
>>>> I agree with Ulrich, I don't see the issue.
>>>>
>>>>
>>>> On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>>>> Ben wrote:
>>>>> -- 4.3, third paragraph from end:
>>>>>    =20
>>>>> This still assumes that reporting nodes cannot change algorithms=20
>>>>> during overload. I thought we agreed to remove that. (The=20
>>>>> normative text is also still there--see later comment.)
>>>>>    =20
>>>>>  I don't understand. In my copy of -06 the third paragraph fr=
om end in 4.3 reads:
>>>>>       Two types of overload abatement treatment are defined, diversio=
n and
>>>>>       throttling.  Reacting nodes are responsible for determining whi=
ch
>>>>>       treatment is appropriate for individual requests.
>>>>> How does this text assume that reporting nodes cannot change algorith=
ms during overload?
>>>>>    =20
>>>>>    =20
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> DiME mailing list
>>>>>
>>>>> DiME@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/dime
>>>> _______________________________________________
>>>> DiME mailing list
>>>> DiME@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/dime
>>> _______________________________________________
>>> DiME mailing list
>>> DiME@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dime
>>>
>

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From: "Wiehe, Ulrich (NSN - DE/Munich)" 
To: ext Ben Campbell , Maria Cruz Bartolome 
Thread-Topic: [Dime] DOIC M-Bit usage (was Re: WLGC #2 for draft-ietf-dime-ovli-06)
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Subject: Re: [Dime] DOIC M-Bit usage (was Re: WLGC #2 for draft-ietf-dime-ovli-06)
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Ben,

for my clarification:
this issue seems to be a general thing and not related specifically to DOIC=
.=20

Any potential modification, addition, clarification,... would not impact DO=
IC but RFC6733.
Is this the correct understanding?

Ulrich

-----Original Message-----
From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben Campbell
Sent: Thursday, January 22, 2015 10:34 PM
To: Maria Cruz Bartolome
Cc: dime@ietf.org
Subject: [Dime] DOIC M-Bit usage (was Re: WLGC #2 for draft-ietf-dime-ovli-=
06)

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512


On Jan 22, 2015, at 10:41 AM, Maria Cruz Bartolome  wrote:

A) About 'M' bit:

My understanding of RFC6733:

     The 'M' bit, known as the Mandatory bit, indicates whether the
     receiver of the AVP MUST parse and understand the semantics of the
     AVP including its content.  The receiving entity MUST return an
     appropriate error message if it receives an AVP that has the M-bit
     set but does not understand it.  An exception applies when the AVP
     is embedded within a Grouped AVP.  See Section 4.4 for details.

      4.4:
  Receivers of a Grouped AVP that
  does not have the 'M' (mandatory) bit set and one or more of the
  encapsulated AVPs within the group has the 'M' (mandatory) bit set
  MAY simply be ignored if the Grouped AVP itself is unrecognized.  The
  rule applies even if the encapsulated AVP with its 'M' (mandatory)
  bit set is further encapsulated within other sub-groups, i.e., other
  Grouped AVPs embedded within the Grouped AVP.


If the Grouped AVP does not have the 'M' bit set, but one (or more) of its =
sub-AVPs do have it, then the grouped AVP may be ignored (instead of sendin=
g an error) if the Grouped AVP itself is "unrecognized"
But what "unrecognized" mean in this context? In my opinion, the grouped AV=
P is not recognized as long as mandatory sub-AVPs are missed, this includes=
 conditionally mandatory (up to negotiation) sub AVPs.
Then I would proposed a variant to your proposal 2 below:

That's not what "unrecognized" typically means in IETF specs. The common us=
age is to mean that the recipient doesn't recognize it, or doesn't know wha=
t it means. This is  distinct from "malformed" meaning it wasn't constructe=
d correctly.  Missing mandatory sub-AVPs would fall into the "malformed" ca=
tegory, not the "unrecognized" category. .
By definition, a DOIC cannot claim OC-Supported-Features or OC-OLR as unrec=
ognized.=20


3) sub-AVPs of DOIC grouped AVPs MUST NOT  have the m-bit set unless the su=
b-avp is mandatory or conditionally mandatory (i.e. part of an extension ex=
plicitly negotiated in the feature vector).

Also, the M-bit doesn't mean the avp is mandatory to be present, just manda=
tory to be understood. By definition, you can't set the M-bit on an AVP tha=
t is not actually there.  (Other things may make it mandatory to be present=
, such as the feature or application definition, but that still doesn't nec=
essarily mean it's mandatory to understand.) It's also possible that some n=
ew feature will involve an AVP that is not there all the time, but mandator=
y to understand when it is there..


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From: Maria Cruz Bartolome 
To: Ben Campbell 
Thread-Topic: DOIC M-Bit usage (was Re: [Dime] WLGC #2 for draft-ietf-dime-ovli-06)
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From nobody Fri Jan 23 02:01:58 2015
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From: RFC Errata System 
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Date: Fri, 23 Jan 2015 02:01:24 -0800 (PST)
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Cc: dime@ietf.org, iesg@ietf.org, rfc-editor@rfc-editor.org
Subject: [Dime] [Errata Rejected] RFC6733 (4209)
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The following errata report has been rejected for RFC6733,
"Diameter Base Protocol".

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata_search.php?rfc=6733&eid=4209

--------------------------------------
Status: Rejected
Type: Technical

Reported by: Hans Liu 
Date Reported: 2014-12-25
Rejected by: Benoit Claise (IESG)

Section: 5.4.3

Original Text
-------------
      BUSY                              1
         The peer’s internal resources are constrained, and it has
         determined that the transport connection needs to be closed.
         A receiver of a DPR with above result code SHOULD NOT attempt
         reconnection.

Corrected Text
--------------
      BUSY                              1
         The peer’s internal resources are constrained, and it has
         determined that the transport connection needs to be closed.
         A receiver of a DPR with above result code SHOULD either 
         connect to an alternate node, or attempt reconnection
         after a time period.

Notes
-----
In most implementations, the Diameter node will continue to serve its peer after the resources recover and expect reconnection. If the Diameter node won't like reconnection from peer, DO_NOT_WANT_TO_TALK_TO_YOU can be used instead of BUSY.
 --VERIFIER NOTES-- 
The text describing the "BUSY" and "DO_NOT_WANT_TO_TALK_TO_YOU" cases is consistent with the text found in the introduction of the section 5.4.

  "In the event that the
   disconnect was a result of either a shortage of internal resources or
   simply that the node in question has no intentions of forwarding any
   Diameter messages to the peer in the foreseeable future, a periodic
   connection request would not be welcomed.  The Disconnection-Reason
   AVP contains the reason the Diameter node issued the Disconnect-Peer-
   Request message.

   The Disconnect-Peer-Request message is used by a Diameter node to
   inform its peer of its intent to disconnect the transport layer and
   that the peer shouldn't reconnect unless it has a valid reason to do
   so (e.g., message to be forwarded). " 

So the main purpose for sending a DPR with the causes "BUSY" and "DO_NOT_WANT_TO_TALK_TO_YOU" is actually to avoid the periodic reconnection attempts governed by the Tc timer.
These exceptions are mentioned in the section 2.1:

  "When no transport connection exists with a peer, an attempt to
   connect SHOULD be made periodically.  This behavior is handled via
   the Tc timer (see Section 12 for details), whose recommended value is
   30 seconds.  There are certain exceptions to this rule, such as when
   a peer has terminated the transport connection stating that it does
   not wish to communicate."

Now, it is true that there is no clear guideline on how to behave when receiving the cause "BUSY" and this explains why some implementations in the field still attempt to re-open the connection, as after a normal transport failure detection. But it does not mean that the text in the RFC6733 is wrong.

Finally, if it is an attempt to clarify/modify the behavior of the peer receiving DPR with the "BUSY" cause, I don't think that using errata would be the most appropriate way. 

--------------------------------------
RFC6733 (draft-ietf-dime-rfc3588bis-33)
--------------------------------------
Title               : Diameter Base Protocol
Publication Date    : October 2012
Author(s)           : V. Fajardo, Ed., J. Arkko, J. Loughney, G. Zorn, Ed.
Category            : PROPOSED STANDARD
Source              : Diameter Maintenance and Extensions
Area                : Operations and Management
Stream              : IETF
Verifying Party     : IESG


From nobody Fri Jan 23 05:17:34 2015
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Date: Fri, 23 Jan 2015 07:17:21 -0600
From: Steve Donovan 
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To: Maria Cruz Bartolome ,  Ben Campbell 
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Archived-At: 
Cc: "dime@ietf.org" 
Subject: Re: [Dime] DOIC M-Bit usage (was Re: WLGC #2 for draft-ietf-dime-ovli-06)
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I would propose the following resolution to the M-bit issue:

1) We say that new extensions MUST NOT require the M-bit be set for new 
sub-AVPs of the OC-Supported-Features AVP or the OC-OLR AVP.

2) We indicate that if there a new extension includes behavior that 
requires 6733 defined M-bit behavior then the new extension can define a 
new AVP.  It just can't make that new AVP part of OC-Supported-Features 
or OC-OLR.

Does this address everyone's concerns?

Steve

On 1/23/15 3:46 AM, Maria Cruz Bartolome wrote:
> See below
> Thanks
>
> -----Original Message-----
> From: Ben Campbell [mailto:ben@nostrum.com]
> Sent: jueves, 22 de enero de 2015 22:34
> To: Maria Cruz Bartolome
> Cc: Steve Donovan; dime@ietf.org
> Subject: DOIC M-Bit usage (was Re: [Dime] WLGC #2 for draft-ietf-dime-ovli-06)
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA512
>
>
> On Jan 22, 2015, at 10:41 AM, Maria Cruz Bartolome  wrote:
>
> A) About 'M' bit:
>
> My understanding of RFC6733:
>
>       The 'M' bit, known as the Mandatory bit, indicates whether the
>       receiver of the AVP MUST parse and understand the semantics of the
>       AVP including its content.  The receiving entity MUST return an
>       appropriate error message if it receives an AVP that has the M-bit
>       set but does not understand it.  An exception applies when the AVP
>       is embedded within a Grouped AVP.  See Section 4.4 for details.
>
>        4.4:
>    Receivers of a Grouped AVP that
>    does not have the 'M' (mandatory) bit set and one or more of the
>    encapsulated AVPs within the group has the 'M' (mandatory) bit set
>    MAY simply be ignored if the Grouped AVP itself is unrecognized.  The
>    rule applies even if the encapsulated AVP with its 'M' (mandatory)
>    bit set is further encapsulated within other sub-groups, i.e., other
>    Grouped AVPs embedded within the Grouped AVP.
>
>
> If the Grouped AVP does not have the 'M' bit set, but one (or more) of its sub-AVPs do have it, then the grouped AVP may be ignored (instead of sending an error) if the Grouped AVP itself is "unrecognized"
> But what "unrecognized" mean in this context? In my opinion, the grouped AVP is not recognized as long as mandatory sub-AVPs are missed, this includes conditionally mandatory (up to negotiation) sub AVPs.
> Then I would proposed a variant to your proposal 2 below:
>
> That's not what "unrecognized" typically means in IETF specs. The common usage is to mean that the recipient doesn't recognize it, or doesn't know what it means. This is  distinct from "malformed" meaning it wasn't constructed correctly.  Missing mandatory sub-AVPs would fall into the "malformed" category, not the "unrecognized" category. .
> By definition, a DOIC cannot claim OC-Supported-Features or OC-OLR as unrecognized.
>
>
> 3) sub-AVPs of DOIC grouped AVPs MUST NOT  have the m-bit set unless the sub-avp is mandatory or conditionally mandatory (i.e. part of an extension explicitly negotiated in the feature vector).
>
> Also, the M-bit doesn't mean the avp is mandatory to be present, just mandatory to be understood. By definition, you can't set the M-bit on an AVP that is not actually there.  (Other things may make it mandatory to be present, such as the feature or application definition, but that still doesn't necessarily mean it's mandatory to understand.) It's also possible that some new feature will involve an AVP that is not there all the time, but mandatory to understand when it is there..
>
> [MCruz] Any mandatory or conditionally mandatory AVP, it is as well mandatory to be understood by any DOIC-enabled.
>
> -----BEGIN PGP SIGNATURE-----
> Comment: GPGTools - https://gpgtools.org
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Archived-At: 
Cc: "dime@ietf.org" 
Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
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On 1/23/15 3:05 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
> Steve,
>
> I agree with Maria Cruz that the text in -06 is wrong as it says
>
>     The reporting node is not allowed to change the overload abatement algorithm while
>     the reporting node is in an overload condition.
>
> Also your previously suggested modification
>
>>> Before:
>>>
>>>        Reporting nodes can change the overload abatement algorithm indicated
>>>        in the OC-Feature-Vector AVP if the reporting node is not currently
>>>        in an overload condition and sending overload reports.  The reporting
>>>        node is not allowed to change the overload abatement algorithm while
>>>        the reporting node is in an overload condition.
>>>
>>> After:
>>>
>>>        Reporting nodes can change the overload abatement algorithm indicated
>>>        in the OC-Feature-Vector AVP if the reporting node is not currently
>>>        in an overload condition and sending overload reports.
> Does not clearly say that reporting nodes are allowed to change algorithm during an ongoing overload condition.
SRD> Agreed.  I think the paragraph can be removed entirely as it will 
just cause confusion.  There are no restrictions on a reporting nodes 
ability to change the selected algorithm.
>
> Also maybe we can add a note to say that during an ongoing overload condition reacting nodes may chose to stop advertizing support of all algorithms except the one selected by the reporting node and loss in order to prevent change of algorithm (other than towards loss) during an ongoing overload condition.
SRD> How about if we add the following to the end of 5.1.1: "Reacting 
nodes need to be prepared for the reporting node to change selected 
algorithms.  This can happen at any time, including when the reporting 
node has sent an active overload report.  The reacting node can minimize 
the potential changes by modifying the advertised abatement algorithms 
sent to an overloaded reporting node to the currently selected algorithm 
and loss (or just loss if it is the currently selected algorithm).  This 
has the effect of limiting the potential change in abatement algorithm 
from the currently selected algorithm to loss, avoiding changes to more 
complex abatement algorithms that require state to operate properly."

>
> Ulrich
>
> -----Original Message-----
> From: ext Maria Cruz Bartolome [mailto:maria.cruz.bartolome@ericsson.com]
> Sent: Thursday, January 22, 2015 6:13 PM
> To: Steve Donovan; Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
> Cc: dime@ietf.org
> Subject: RE: [Dime] Ben's comments on 4.3, third paragraph from end
>
> Ulrich, Steve,
>
> Not sure closing the issue would mean some rephrasing or you have agreed it is not needed.
>
> Anyway, the last sentence in this paragraph, is saying the same as first part:
>
> 4.2, 3rd paragraph from the end:
>
>     Reporting nodes can change the overload abatement algorithm indicated
>     in the OC-Feature-Vector AVP if the reporting node is not currently
>     in an overload condition and sending overload reports.  The reporting
>     node is not allowed to change the overload abatement algorithm while
>     the reporting node is in an overload condition.
>
>
> Best regards
> /MCruz
>
> -----Original Message-----
> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of Steve Donovan
> Sent: jueves, 22 de enero de 2015 15:32
> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
> Cc: dime@ietf.org
> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>
> Ulrich,
>
> I agree that the reacting node can do as you say and change what it advertises after the start of an overload condition.  Do you agree that this does not require any changes to the DOIC spec?  If so, then do you agree we can close on this issue?
>
> Regards,
>
> Steve
>
> On 1/22/15 3:37 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>> Steve,
>> see inline.
>> Regards
>> Ulrich
>>
>> -----Original Message-----
>> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]
>> Sent: Wednesday, January 21, 2015 5:46 PM
>> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
>> Cc: dime@ietf.org
>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>
>>
>> On 1/21/15 4:06 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>> Steve,
>>> I'm not sure.
>>> My understanding is:
>>> 1. Two answer messages (with same application id) sent by a reporting node while not in an overload condition can have different selected overload abatement algorithms in the OC-Feature-Vector AVP.
>> SRD> Correct, one set of answer messages could indicate loss and the
>> other rate (for instance).  This would happen if the reporting node
>> policy prefers rate but there is a mix of reacting node capabilities.
>> In this case where not all reacting nodes support the reporting nodes
>> preferred algorithm, the reporting node could also decide to send loss
>> to all reacting nodes.
>>
>> Ulrich> Although this is right, it does not hit the nail. I should have said:
>> 1a. Two answer messages (with same application id) sent by a reporting node while in or not in an overload condition can have different selected overload abatement algorithms in the OC-Feature-Vector AVP when the corresponding request messages advertize different sets of supported algorithms.
>> 1b. Two answer messages (with same application id) sent by a reporting node while not in an overload condition can have different selected overload abatement algorithms in the OC-Feature-Vector AVP even when the corresponding request messages advertize the same set of supported algorithms.
>> As you say , 1a would happen if there is a mix of reacting node capabilities. 1b would happen if the policy is changed in the reporting node.
>>
>>> 2. Two answer messages (with same application id) sent by a reporting node while in an (the same) overload condition must have the same selected overload abatement algorithm in the OC-Feature-Vector AVP if the two sets A and B are identical, where A is the intersection of the set of advertized algorithms received in the request that corresponds to the one answer message with the set of algorithms that are supported (at the time the one answer message is sent) by the reporting node, and B is the intersection of the set of advertized algorithms received in the request that corresponds to the other answer message with the set of algorithms that are supported (at the time the other answer message is sent) by the reporting node; And the set of algorithms supported by the reporting node must not change during an overload condition.
>> SRD> I'm a little lost in your description here.  It is possible for
>> SRD> the
>> reporting node be in an overload state and be sending loss reports to
>> one set of reacting nodes and rate to a second set of reacting nodes.
>>
>> Ulrich> yes, loss to the reacting nodes that advertize loss only and rate to the reacting nodes that advertize rate and loss. If we do not allow this, then a reporting node cannot select rate (although supported by most reacting nodes) as long as one reacting node only supports loss.
>>     
>> Whether or not the reporting node does this is entirely up to the
>> implementation at the reporting node.
>>
>> Ulrich> it is up to configuration: the reporting node may be configured to "select rate when loss and rate is advertized and to select loss when only loss is advertized". Alternatively the reporting node may be configured to "select loss when loss and rate is advertized and to select loss when only loss is advertized".
>>
>>> This ensures that reacting nodes, while not changing the set of advertized algorithms, will not receive a change of the selected algorithm during an overload condition (without the need for the reporting node to keep history data).
>> SRD> The algorithm sent by the reporting node will be decided based on
>> SRD> a
>> combination of the advertised algorithms and policy at the reporting
>> node.  If there is some change in policy at the reporting node that
>> changes the selection then the reacting node needs to be prepared to
>> handle the change.  I think you are suggesting we say this cannot
>> happen during an active overload at the reporting node.  Is this correct?
>>    
>> Ulrich> yes.
>>
>> SRD> As things stand now, with the changes made in -06 and the coming
>> -07, the reacting node will need to be able to handle a change in
>> algorithm during an active overload condition.  What is the benefit of
>> changing this?  If the algorithm changes during an overload condition
>> the reacting node can just treat it as an end of one overload
>> condition and the start of another.
>>
>> Ulrich> yes that is possible but adds complexity to the reacting node especially when changing from a stateless to a stateful algorithm. There may also be issues with the mechanism's stability. During an overload condition reporting nodes should not force reacting nodes to change algorithm.
>> On reflection, reacting nodes that support (and advertize) loss and rate could - when receiving OLR with loss - stopp advertizing rate as long as the overload condition is ongoing in order to prevent change from loss to rate during the overload condition. With this trick, the only way of change is towards loss, and that may be acceptable (as it is a one time change and you cannot change back and forth).
>>> Ulrich
>>>
>>>
>>> -----Original Message-----
>>> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]
>>> Sent: Tuesday, January 20, 2015 7:27 PM
>>> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
>>> Cc: dime@ietf.org
>>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>>
>>>      I have removed the last sentence in the paragraph in question.
>>> The before and after for the paragraph is as follows:
>>>
>>> Before:
>>>
>>>        Reporting nodes can change the overload abatement algorithm indicated
>>>        in the OC-Feature-Vector AVP if the reporting node is not currently
>>>        in an overload condition and sending overload reports.  The reporting
>>>        node is not allowed to change the overload abatement algorithm while
>>>        the reporting node is in an overload condition.
>>>
>>> After:
>>>
>>>        Reporting nodes can change the overload abatement algorithm indicated
>>>        in the OC-Feature-Vector AVP if the reporting node is not currently
>>>        in an overload condition and sending overload reports.
>>>
>>> Ulrich,
>>>
>>> I'm not sure I understand your point about the assignment of commonly
>>> supported algorithms.  Are you ok with this change?
>>>
>>> Regards,
>>>
>>> Steve
>>> On 1/16/15 4:30 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>>> Ben
>>>>
>>>> The Note at the beginning of 5.1 is about change of announced capabilities in reacting nodes, while the text in 4.2 (and 5.2.1.4) is about change of selected algorithm by reporting nodes.
>>>> I don't think the text in 4.2 (and 5.2.1.4) is totally wrong. Of course, if the reacting node changes the set of announced capabilities, the reporting node may change (or even need to  change) the selected algorithm. What is not allowed to be changed by the reporting node during an overload condition is the deterministic function that assignes to every set of commonly supported algorithms a distinct selected algorithm.
>>>>
>>>>
>>>> Ulrich
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben
>>>> Campbell
>>>> Sent: Thursday, January 15, 2015 4:19 PM
>>>> To: Steve Donovan
>>>> Cc: dime@ietf.org
>>>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>>>
>>>> Sorry, that was 4.2.
>>>>
>>>>> On Jan 15, 2015, at 7:14 AM, Steve Donovan  wrote:
>>>>>
>>>>> I agree with Ulrich, I don't see the issue.
>>>>>
>>>>>
>>>>> On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>>>>> Ben wrote:
>>>>>> -- 4.3, third paragraph from end:
>>>>>>      
>>>>>> This still assumes that reporting nodes cannot change algorithms
>>>>>> during overload. I thought we agreed to remove that. (The
>>>>>> normative text is also still there--see later comment.)
>>>>>>      
>>>>>>  I don't understand. In my copy of -06 the third paragraph from end in 4.3 reads:
>>>>>>        Two types of overload abatement treatment are defined, diversion and
>>>>>>        throttling.  Reacting nodes are responsible for determining which
>>>>>>        treatment is appropriate for individual requests.
>>>>>> How does this text assume that reporting nodes cannot change algorithms during overload?
>>>>>>      
>>>>>>      
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> DiME mailing list
>>>>>>
>>>>>> DiME@ietf.org
>>>>>> https://www.ietf.org/mailman/listinfo/dime
>>>>> _______________________________________________
>>>>> DiME mailing list
>>>>> DiME@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/dime
>>>> _______________________________________________
>>>> DiME mailing list
>>>> DiME@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/dime
>>>>
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime
>


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From: "Wiehe, Ulrich (NSN - DE/Munich)" 
To: ext Steve Donovan , ext Maria Cruz Bartolome , ext Ben Campbell 
Thread-Topic: [Dime] Ben's comments on 4.3, third paragraph from end
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Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
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Fine with me.
Ulrich

-----Original Message-----
From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]=20
Sent: Friday, January 23, 2015 2:35 PM
To: Wiehe, Ulrich (NSN - DE/Munich); ext Maria Cruz Bartolome; ext Ben Camp=
bell
Cc: dime@ietf.org
Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end


On 1/23/15 3:05 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
> Steve,
>
> I agree with Maria Cruz that the text in -06 is wrong as it says
>
>     The reporting node is not allowed to change the overload abatement al=
gorithm while
>     the reporting node is in an overload condition.
>
> Also your previously suggested modification
>
>>> Before:
>>>
>>>        Reporting nodes can change the overload abatement algorithm indi=
cated
>>>        in the OC-Feature-Vector AVP if the reporting node is not curren=
tly
>>>        in an overload condition and sending overload reports.  The repo=
rting
>>>        node is not allowed to change the overload abatement algorithm w=
hile
>>>        the reporting node is in an overload condition.
>>>
>>> After:
>>>
>>>        Reporting nodes can change the overload abatement algorithm indi=
cated
>>>        in the OC-Feature-Vector AVP if the reporting node is not curren=
tly
>>>        in an overload condition and sending overload reports.
> Does not clearly say that reporting nodes are allowed to change algorithm=
 during an ongoing overload condition.
SRD> Agreed.  I think the paragraph can be removed entirely as it will=20
just cause confusion.  There are no restrictions on a reporting nodes=20
ability to change the selected algorithm.
>
> Also maybe we can add a note to say that during an ongoing overload condi=
tion reacting nodes may chose to stop advertizing support of all algorithms=
 except the one selected by the reporting node and loss in order to prevent=
 change of algorithm (other than towards loss) during an ongoing overload c=
ondition.
SRD> How about if we add the following to the end of 5.1.1: "Reacting=20
nodes need to be prepared for the reporting node to change selected=20
algorithms.  This can happen at any time, including when the reporting=20
node has sent an active overload report.  The reacting node can minimize=20
the potential changes by modifying the advertised abatement algorithms=20
sent to an overloaded reporting node to the currently selected algorithm=20
and loss (or just loss if it is the currently selected algorithm).  This=20
has the effect of limiting the potential change in abatement algorithm=20
from the currently selected algorithm to loss, avoiding changes to more=20
complex abatement algorithms that require state to operate properly."

>
> Ulrich
>
> -----Original Message-----
> From: ext Maria Cruz Bartolome [mailto:maria.cruz.bartolome@ericsson.com]
> Sent: Thursday, January 22, 2015 6:13 PM
> To: Steve Donovan; Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
> Cc: dime@ietf.org
> Subject: RE: [Dime] Ben's comments on 4.3, third paragraph from end
>
> Ulrich, Steve,
>
> Not sure closing the issue would mean some rephrasing or you have agreed =
it is not needed.
>
> Anyway, the last sentence in this paragraph, is saying the same as first =
part:
>
> 4.2, 3rd paragraph from the end:
>
>     Reporting nodes can change the overload abatement algorithm indicated
>     in the OC-Feature-Vector AVP if the reporting node is not currently
>     in an overload condition and sending overload reports.  The reporting
>     node is not allowed to change the overload abatement algorithm while
>     the reporting node is in an overload condition.
>
>
> Best regards
> /MCruz
>
> -----Original Message-----
> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of Steve Donovan
> Sent: jueves, 22 de enero de 2015 15:32
> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
> Cc: dime@ietf.org
> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>
> Ulrich,
>
> I agree that the reacting node can do as you say and change what it adver=
tises after the start of an overload condition.  Do you agree that this doe=
s not require any changes to the DOIC spec?  If so, then do you agree we ca=
n close on this issue?
>
> Regards,
>
> Steve
>
> On 1/22/15 3:37 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>> Steve,
>> see inline.
>> Regards
>> Ulrich
>>
>> -----Original Message-----
>> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]
>> Sent: Wednesday, January 21, 2015 5:46 PM
>> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
>> Cc: dime@ietf.org
>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>
>>
>> On 1/21/15 4:06 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>> Steve,
>>> I'm not sure.
>>> My understanding is:
>>> 1. Two answer messages (with same application id) sent by a reporting n=
ode while not in an overload condition can have different selected overload=
 abatement algorithms in the OC-Feature-Vector AVP.
>> SRD> Correct, one set of answer messages could indicate loss and the
>> other rate (for instance).  This would happen if the reporting node
>> policy prefers rate but there is a mix of reacting node capabilities.
>> In this case where not all reacting nodes support the reporting nodes
>> preferred algorithm, the reporting node could also decide to send loss
>> to all reacting nodes.
>>
>> Ulrich> Although this is right, it does not hit the nail. I should have =
said:
>> 1a. Two answer messages (with same application id) sent by a reporting n=
ode while in or not in an overload condition can have different selected ov=
erload abatement algorithms in the OC-Feature-Vector AVP when the correspon=
ding request messages advertize different sets of supported algorithms.
>> 1b. Two answer messages (with same application id) sent by a reporting n=
ode while not in an overload condition can have different selected overload=
 abatement algorithms in the OC-Feature-Vector AVP even when the correspond=
ing request messages advertize the same set of supported algorithms.
>> As you say , 1a would happen if there is a mix of reacting node capabili=
ties. 1b would happen if the policy is changed in the reporting node.
>>
>>> 2. Two answer messages (with same application id) sent by a reporting n=
ode while in an (the same) overload condition must have the same selected o=
verload abatement algorithm in the OC-Feature-Vector AVP if the two sets A =
and B are identical, where A is the intersection of the set of advertized a=
lgorithms received in the request that corresponds to the one answer messag=
e with the set of algorithms that are supported (at the time the one answer=
 message is sent) by the reporting node, and B is the intersection of the s=
et of advertized algorithms received in the request that corresponds to the=
 other answer message with the set of algorithms that are supported (at the=
 time the other answer message is sent) by the reporting node; And the set =
of algorithms supported by the reporting node must not change during an ove=
rload condition.
>> SRD> I'm a little lost in your description here.  It is possible for
>> SRD> the
>> reporting node be in an overload state and be sending loss reports to
>> one set of reacting nodes and rate to a second set of reacting nodes.
>>
>> Ulrich> yes, loss to the reacting nodes that advertize loss only and rat=
e to the reacting nodes that advertize rate and loss. If we do not allow th=
is, then a reporting node cannot select rate (although supported by most re=
acting nodes) as long as one reacting node only supports loss.
>>    =20
>> Whether or not the reporting node does this is entirely up to the
>> implementation at the reporting node.
>>
>> Ulrich> it is up to configuration: the reporting node may be configured =
to "select rate when loss and rate is advertized and to select loss when on=
ly loss is advertized". Alternatively the reporting node may be configured =
to "select loss when loss and rate is advertized and to select loss when on=
ly loss is advertized".
>>
>>> This ensures that reacting nodes, while not changing the set of adverti=
zed algorithms, will not receive a change of the selected algorithm during =
an overload condition (without the need for the reporting node to keep hist=
ory data).
>> SRD> The algorithm sent by the reporting node will be decided based on
>> SRD> a
>> combination of the advertised algorithms and policy at the reporting
>> node.  If there is some change in policy at the reporting node that
>> changes the selection then the reacting node needs to be prepared to
>> handle the change.  I think you are suggesting we say this cannot
>> happen during an active overload at the reporting node.  Is this correct=
?
>>   =20
>> Ulrich> yes.
>>
>> SRD> As things stand now, with the changes made in -06 and the coming
>> -07, the reacting node will need to be able to handle a change in
>> algorithm during an active overload condition.  What is the benefit of
>> changing this?  If the algorithm changes during an overload condition
>> the reacting node can just treat it as an end of one overload
>> condition and the start of another.
>>
>> Ulrich> yes that is possible but adds complexity to the reacting node es=
pecially when changing from a stateless to a stateful algorithm. There may =
also be issues with the mechanism's stability. During an overload condition=
 reporting nodes should not force reacting nodes to change algorithm.
>> On reflection, reacting nodes that support (and advertize) loss and rate=
 could - when receiving OLR with loss - stopp advertizing rate as long as t=
he overload condition is ongoing in order to prevent change from loss to ra=
te during the overload condition. With this trick, the only way of change i=
s towards loss, and that may be acceptable (as it is a one time change and =
you cannot change back and forth).
>>> Ulrich
>>>
>>>
>>> -----Original Message-----
>>> From: ext Steve Donovan [mailto:srdonovan@usdonovans.com]
>>> Sent: Tuesday, January 20, 2015 7:27 PM
>>> To: Wiehe, Ulrich (NSN - DE/Munich); ext Ben Campbell
>>> Cc: dime@ietf.org
>>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>>
>>>      I have removed the last sentence in the paragraph in question.
>>> The before and after for the paragraph is as follows:
>>>
>>> Before:
>>>
>>>        Reporting nodes can change the overload abatement algorithm indi=
cated
>>>        in the OC-Feature-Vector AVP if the reporting node is not curren=
tly
>>>        in an overload condition and sending overload reports.  The repo=
rting
>>>        node is not allowed to change the overload abatement algorithm w=
hile
>>>        the reporting node is in an overload condition.
>>>
>>> After:
>>>
>>>        Reporting nodes can change the overload abatement algorithm indi=
cated
>>>        in the OC-Feature-Vector AVP if the reporting node is not curren=
tly
>>>        in an overload condition and sending overload reports.
>>>
>>> Ulrich,
>>>
>>> I'm not sure I understand your point about the assignment of commonly
>>> supported algorithms.  Are you ok with this change?
>>>
>>> Regards,
>>>
>>> Steve
>>> On 1/16/15 4:30 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>>> Ben
>>>>
>>>> The Note at the beginning of 5.1 is about change of announced capabili=
ties in reacting nodes, while the text in 4.2 (and 5.2.1.4) is about change=
 of selected algorithm by reporting nodes.
>>>> I don't think the text in 4.2 (and 5.2.1.4) is totally wrong. Of cours=
e, if the reacting node changes the set of announced capabilities, the repo=
rting node may change (or even need to  change) the selected algorithm. Wha=
t is not allowed to be changed by the reporting node during an overload con=
dition is the deterministic function that assignes to every set of commonly=
 supported algorithms a distinct selected algorithm.
>>>>
>>>>
>>>> Ulrich
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben
>>>> Campbell
>>>> Sent: Thursday, January 15, 2015 4:19 PM
>>>> To: Steve Donovan
>>>> Cc: dime@ietf.org
>>>> Subject: Re: [Dime] Ben's comments on 4.3, third paragraph from end
>>>>
>>>> Sorry, that was 4.2.
>>>>
>>>>> On Jan 15, 2015, at 7:14 AM, Steve Donovan =
 wrote:
>>>>>
>>>>> I agree with Ulrich, I don't see the issue.
>>>>>
>>>>>
>>>>> On 1/15/15 3:58 AM, Wiehe, Ulrich (NSN - DE/Munich) wrote:
>>>>>> Ben wrote:
>>>>>> -- 4.3, third paragraph from end:
>>>>>>     =20
>>>>>> This still assumes that reporting nodes cannot change algorithms
>>>>>> during overload. I thought we agreed to remove that. (The
>>>>>> normative text is also still there--see later comment.)
>>>>>>     =20
>>>>>>  I don't understand. In my copy of -06 the third paragraph f=
rom end in 4.3 reads:
>>>>>>        Two types of overload abatement treatment are defined, divers=
ion and
>>>>>>        throttling.  Reacting nodes are responsible for determining w=
hich
>>>>>>        treatment is appropriate for individual requests.
>>>>>> How does this text assume that reporting nodes cannot change algorit=
hms during overload?
>>>>>>     =20
>>>>>>     =20
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> DiME mailing list
>>>>>>
>>>>>> DiME@ietf.org
>>>>>> https://www.ietf.org/mailman/listinfo/dime
>>>>> _______________________________________________
>>>>> DiME mailing list
>>>>> DiME@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/dime
>>>> _______________________________________________
>>>> DiME mailing list
>>>> DiME@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/dime
>>>>
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime
>


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Date: Fri, 23 Jan 2015 07:38:29 -0600
From: Steve Donovan 
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Subject: [Dime] Coming out of 100% reduction (was Re: WLGC #2 for draft-ietf-dime-ovli-06)
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I'm ok with Maria Cruz's suggested change.

Steve

On 1/22/15 10:41 AM, Maria Cruz Bartolome wrote:
> Dear all,
>
> A) About 'M' bit:
>
> My understanding of RFC6733:
>
>        The 'M' bit, known as the Mandatory bit, indicates whether the
>        receiver of the AVP MUST parse and understand the semantics of the
>        AVP including its content.  The receiving entity MUST return an
>        appropriate error message if it receives an AVP that has the M-bit
>        set but does not understand it.  An exception applies when the AVP
>        is embedded within a Grouped AVP.  See Section 4.4 for details.
>
>         4.4:
>     Receivers of a Grouped AVP that
>     does not have the 'M' (mandatory) bit set and one or more of the
>     encapsulated AVPs within the group has the 'M' (mandatory) bit set
>     MAY simply be ignored if the Grouped AVP itself is unrecognized.  The
>     rule applies even if the encapsulated AVP with its 'M' (mandatory)
>     bit set is further encapsulated within other sub-groups, i.e., other
>     Grouped AVPs embedded within the Grouped AVP.
>
>
> If the Grouped AVP does not have the 'M' bit set, but one (or more) of its sub-AVPs do have it, then the grouped AVP may be ignored (instead of sending an error) if the Grouped AVP itself is "unrecognized"
> But what "unrecognized" mean in this context? In my opinion, the grouped AVP is not recognized as long as mandatory sub-AVPs are missed, this includes conditionally mandatory (up to negotiation) sub AVPs.
> Then I would proposed a variant to your proposal 2 below:
>
> 3) sub-AVPs of DOIC grouped AVPs MUST NOT  have the m-bit set unless the sub-avp is mandatory or conditionally mandatory (i.e. part of an extension explicitly negotiated in the feature vector).
>
>
> B) Going out of 100% reduction
>
> I think we should keep 5.2.2 as it is.
> But I think there is a bit of misalignment with 6.3. I will propose following rephrasing:
>
> Now: 5th paragraph:
>
>     If reacting node comes out of the 100 percent traffic reduction as a
>     result of the overload report timing out, the following procedures
>     are RECOMMENDED to be applied.  The reacting node sending the traffic
>     should be conservative and, for example, first send "probe" messages
>     to learn the overload condition of the overloaded node before
>     converging to any traffic amount/rate decided by the sender.  Similar
>     concerns apply in all cases when the overload report times out unless
>     the previous overload report stated 0 percent reduction.
>
> Proposed: 5th paragraph:
>
>     If reacting node comes out of the 100 percent traffic reduction as a
>     result of the overload report timing out,					<--
>                                                                  the reacting node sending the traffic	<--
>     SHOULD be conservative and, for example, first send "probe" messages	<--
>     to learn the overload condition of the overloaded node before
>     converging to any traffic amount/rate decided by the sender.  Similar
>     concerns apply in all cases when the overload report times out unless
>     the previous overload report stated 0 percent reduction.
>
>
> Best regards
> /MCruz
>
> -----Original Message-----
> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of Steve Donovan
> Sent: jueves, 22 de enero de 2015 15:38
> To: dime@ietf.org
> Subject: Re: [Dime] WLGC #2 for draft-ietf-dime-ovli-06
>
> All,
>
> We need to close these two issues to finish WGLC #2.
>
> Please review an let me know if the alternatives I have outlined below are acceptable.
>
> Thanks,
>
> Steve
>
> On 1/20/15 3:08 PM, Steve Donovan wrote:
>> On 1/20/15 1:20 PM, Ben Campbell wrote:
>>>> On Jan 20, 2015, at 12:42 PM, Steve Donovan
>>>>  wrote:
>>>>
>>>> The following is the resolution of Ben's issues that were not
>>>> addressed directly in an email thread started by Ulrich.
>>>>
>>>> Regards,
>>>>
>>>> Steve
>>>>
>>>>> -- 5.3, 4th paragraph:
>>>>>
>>>>> As I mentioned in previous discussion, after re-reading the related
>>>>> text in 6733, it's no longer clear to me this works like we thought
>>>>> it did. That is, I think any attempt to make sub-AVPs mandatory
>>>>> risks causing errors in the enclosing Diameter transaction. I don't
>>>>> know how to solve this, other just disallowing mandatory sub-AVPs.
>>>>> (Jouni previously convinced me 6733 treatment of the m-bit in
>>>>> sub-avps worked like we wanted--perhaps he can re-convince me :-)
>>>>>
>>>> SRD>Given that Jouni successfully convinced Ben about the 6733
>>>> treatment, I'm not planning to make any changes, as I'm assuming he
>>>> can be just as successful the second time.
>>> I think that's a bad assumption.
>>>
>>> We had previously assumed that if a node receives a grouped AVP
>>> (without the m-bit set) that includes an unrecognized sub-avp with
>>> the m-bit set, then the receiver could just ignore the entire grouped
>>> AVP, and otherwise process the transaction. But 6733 actually says
>>> the following:
>>>
>>> "Receivers of a Grouped AVP that
>>>      does not have the 'M' (mandatory) bit set and one or more of the
>>>      encapsulated AVPs within the group has the 'M' (mandatory) bit set
>>>      MAY simply be ignored if the Grouped AVP itself is unrecognized.
>>> The
>>>      rule applies even if the encapsulated AVP with its 'M' (mandatory)
>>>      bit set is further encapsulated within other sub-groups, i.e., other
>>>      Grouped AVPs embedded within the Grouped AVP."
>>>
>>> Note the "... if the Grouped AVP itself is unrecognized." clause.
>>>
>>> The case we have in mind is when you receive a _recognized_ grouped
>>> AVP (that is, you implement DOIC), but it includes an unrecognized
>>> sub-avp with the M-bit set. This is not covered by the exception.
>>> This would seem to indicate that the entire request must fail. I
>>> don't think that's what we want.
>> SRD> I see how it could be interpreted that way.
>>> At this point, I think we need to either say that sub-avps of DOIC
>>> grouped AVPs either 1) MUST NOT have the m-bit set, or 2) MUST NOT
>>> have the m-bit set unless the sub-avp is part of an extension
>>> explicitly negotiated in the feature vector.
>> SRD> I'm ok either way but prefer number 2).
>>>
>>>
>> [...]
>>>>> Paragraph 5:
>>>>>
>>>>> Is this redundant to the last paragraph of 5.2.2?
>>>>>
>>>> SRD> I don't see an issue.  One is general and the other specific to
>>>> the loss algorithm.  They don't conflict.
>>> The one in 5.2.2 is specific to situations where an OLR quenches all
>>> requests, and says MUST. So is this, and says RECOMMENDED (which
>>> means SHOULD in 2119).
>> SRD>Actually 5.2.2 isn't only about quenching.  It's also about the
>> reacting node having sent no traffic, because it had no traffic to
>> send, and now needs to send traffic soon after the OCS expires. The
>> reporting node might still be in an overload state but the reacting
>> node doesn't know until the first request is sent.
>>> If the idea is that the text in 6.3 is the recommended way to fulfill
>>> the MUST in 5.2.2, then that's okay I guess (although I would prefer
>>> one of the two to be non-normative.)
>> SRD> 6.3 deals specifically with quenching, thus is a little different
>> than 5.2.2, although there is overlap.
>>> Another approach would to leave this to 6.3, and add something to the
>>> effect that any new algorithm that can cause total quenching of
>>> requests must address how the reacting node restarts from that state.
>> SRD> I prefer to leave it as it currently is.
>>> [...]
>> _______________________________________________
>> DiME mailing list
>> DiME@ietf.org
>> https://www.ietf.org/mailman/listinfo/dime
>>
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime
>


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To: "Wiehe, Ulrich (NSN - DE/Munich)" 
X-Mailer: Apple Mail (2.1993)
Archived-At: 
Cc: "dime@ietf.org" 
Subject: Re: [Dime] DOIC M-Bit usage (was Re: WLGC #2 for draft-ietf-dime-ovli-06)
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> On Jan 23, 2015, at 3:28 AM, Wiehe, Ulrich (NSN - DE/Munich) =
 wrote:
>=20
> Ben,
>=20
> for my clarification:
> this issue seems to be a general thing and not related specifically to =
DOIC.=20
>=20
> Any potential modification, addition, clarification,... would not =
impact DOIC but RFC6733.
> Is this the correct understanding?

Not really. I think the way 6733 describes things was as intended for =
the general case. It's there so that the recipient doesn't have to =
recurse all the way through a bunch of nested group AVPs just to make =
sure there aren't any M-bits set. =20

DOIC is unusual here, in that we are piggybacking info onto an existing =
application. We don't want to induce a failure in that application =
because of an error in DOIC.


>=20
> Ulrich
>=20
> -----Original Message-----
> From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of ext Ben =
Campbell
> Sent: Thursday, January 22, 2015 10:34 PM
> To: Maria Cruz Bartolome
> Cc: dime@ietf.org
> Subject: [Dime] DOIC M-Bit usage (was Re: WLGC #2 for =
draft-ietf-dime-ovli-06)
>=20
> Signed PGP part
>=20
> On Jan 22, 2015, at 10:41 AM, Maria Cruz Bartolome =
 wrote:
>=20
> A) About 'M' bit:
>=20
> My understanding of RFC6733:
>=20
>      The 'M' bit, known as the Mandatory bit, indicates whether the
>      receiver of the AVP MUST parse and understand the semantics of =
the
>      AVP including its content.  The receiving entity MUST return an
>      appropriate error message if it receives an AVP that has the =
M-bit
>      set but does not understand it.  An exception applies when the =
AVP
>      is embedded within a Grouped AVP.  See Section 4.4 for details.
>=20
>       4.4:
>   Receivers of a Grouped AVP that
>   does not have the 'M' (mandatory) bit set and one or more of the
>   encapsulated AVPs within the group has the 'M' (mandatory) bit set
>   MAY simply be ignored if the Grouped AVP itself is unrecognized.  =
The
>   rule applies even if the encapsulated AVP with its 'M' (mandatory)
>   bit set is further encapsulated within other sub-groups, i.e., other
>   Grouped AVPs embedded within the Grouped AVP.
>=20
>=20
> If the Grouped AVP does not have the 'M' bit set, but one (or more) of =
its sub-AVPs do have it, then the grouped AVP may be ignored (instead of =
sending an error) if the Grouped AVP itself is "unrecognized"
> But what "unrecognized" mean in this context? In my opinion, the =
grouped AVP is not recognized as long as mandatory sub-AVPs are missed, =
this includes conditionally mandatory (up to negotiation) sub AVPs.
> Then I would proposed a variant to your proposal 2 below:
>=20
> That's not what "unrecognized" typically means in IETF specs. The =
common usage is to mean that the recipient doesn't recognize it, or =
doesn't know what it means. This is  distinct from "malformed" meaning =
it wasn't constructed correctly.  Missing mandatory sub-AVPs would fall =
into the "malformed" category, not the "unrecognized" category. .
> By definition, a DOIC cannot claim OC-Supported-Features or OC-OLR as =
unrecognized.
>=20
>=20
> 3) sub-AVPs of DOIC grouped AVPs MUST NOT  have the m-bit set unless =
the sub-avp is mandatory or conditionally mandatory (i.e. part of an =
extension explicitly negotiated in the feature vector).
>=20
> Also, the M-bit doesn't mean the avp is mandatory to be present, just =
mandatory to be understood. By definition, you can't set the M-bit on an =
AVP that is not actually there.  (Other things may make it mandatory to =
be present, such as the feature or application definition, but that =
still doesn't necessarily mean it's mandatory to understand.) It's also =
possible that some new feature will involve an AVP that is not there all =
the time, but mandatory to understand when it is there..
>=20
>=20
>=20
> _______________________________________________
> DiME mailing list
> DiME@ietf.org
> https://www.ietf.org/mailman/listinfo/dime


From nobody Fri Jan 23 07:15:22 2015
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From: Ben Campbell 
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To: Steve Donovan 
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Archived-At: 
Cc: "dime@ietf.org" 
Subject: Re: [Dime] DOIC M-Bit usage (was Re: WLGC #2 for draft-ietf-dime-ovli-06)
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

What's the point of 2)? It still introduces a way that a DOIC extension might cause the application transaction to fail. Do we want that?

On Jan 23, 2015, at 7:17 AM, Steve Donovan  wrote:

I would propose the following resolution to the M-bit issue:

1) We say that new extensions MUST NOT require the M-bit be set for new sub-AVPs of the OC-Supported-Features AVP or the OC-OLR AVP.

2) We indicate that if there a new extension includes behavior that requires 6733 defined M-bit behavior then the new extension can define a new AVP.  It just can't make that new AVP part of OC-Supported-Features or OC-OLR.

Does this address everyone's concerns?

Steve

On 1/23/15 3:46 AM, Maria Cruz Bartolome wrote:
See below
Thanks

- -----Original Message-----
From: Ben Campbell [mailto:ben@nostrum.com]
Sent: jueves, 22 de enero de 2015 22:34
To: Maria Cruz Bartolome
Cc: Steve Donovan; dime@ietf.org
Subject: DOIC M-Bit usage (was Re: [Dime] WLGC #2 for draft-ietf-dime-ovli-06)

- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512


On Jan 22, 2015, at 10:41 AM, Maria Cruz Bartolome  wrote:

A) About 'M' bit:

My understanding of RFC6733:

     The 'M' bit, known as the Mandatory bit, indicates whether the
     receiver of the AVP MUST parse and understand the semantics of the
     AVP including its content.  The receiving entity MUST return an
     appropriate error message if it receives an AVP that has the M-bit
     set but does not understand it.  An exception applies when the AVP
     is embedded within a Grouped AVP.  See Section 4.4 for details.

      4.4:
  Receivers of a Grouped AVP that
  does not have the 'M' (mandatory) bit set and one or more of the
  encapsulated AVPs within the group has the 'M' (mandatory) bit set
  MAY simply be ignored if the Grouped AVP itself is unrecognized.  The
  rule applies even if the encapsulated AVP with its 'M' (mandatory)
  bit set is further encapsulated within other sub-groups, i.e., other
  Grouped AVPs embedded within the Grouped AVP.


If the Grouped AVP does not have the 'M' bit set, but one (or more) of its sub-AVPs do have it, then the grouped AVP may be ignored (instead of sending an error) if the Grouped AVP itself is "unrecognized"
But what "unrecognized" mean in this context? In my opinion, the grouped AVP is not recognized as long as mandatory sub-AVPs are missed, this includes conditionally mandatory (up to negotiation) sub AVPs.
Then I would proposed a variant to your proposal 2 below:

That's not what "unrecognized" typically means in IETF specs. The common usage is to mean that the recipient doesn't recognize it, or doesn't know what it means. This is  distinct from "malformed" meaning it wasn't constructed correctly.  Missing mandatory sub-AVPs would fall into the "malformed" category, not the "unrecognized" category. .
By definition, a DOIC cannot claim OC-Supported-Features or OC-OLR as unrecognized.


3) sub-AVPs of DOIC grouped AVPs MUST NOT  have the m-bit set unless the sub-avp is mandatory or conditionally mandatory (i.e. part of an extension explicitly negotiated in the feature vector).

Also, the M-bit doesn't mean the avp is mandatory to be present, just mandatory to be understood. By definition, you can't set the M-bit on an AVP that is not actually there.  (Other things may make it mandatory to be present, such as the feature or application definition, but that still doesn't necessarily mean it's mandatory to understand.) It's also possible that some new feature will involve an AVP that is not there all the time, but mandatory to understand when it is there..

[MCruz] Any mandatory or conditionally mandatory AVP, it is as well mandatory to be understood by any DOIC-enabled.

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From nobody Fri Jan 23 07:41:47 2015
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Date: Fri, 23 Jan 2015 09:41:39 -0600
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Archived-At: 
Cc: "dime@ietf.org" 
Subject: Re: [Dime] DOIC M-Bit usage (was Re: WLGC #2 for draft-ietf-dime-ovli-06)
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On 1/23/15 9:15 AM, Ben Campbell wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA512
>
> What's the point of 2)? It still introduces a way that a DOIC extension might cause the application transaction to fail. Do we want that?
>
> On Jan 23, 2015, at 7:17 AM, Steve Donovan  wrote:
>
> I would propose the following resolution to the M-bit issue:
>
> 1) We say that new extensions MUST NOT require the M-bit be set for new sub-AVPs of the OC-Supported-Features AVP or the OC-OLR AVP.
>
> 2) We indicate that if there a new extension includes behavior that requires 6733 defined M-bit behavior then the new extension can define a new AVP.  It just can't make that new AVP part of OC-Supported-Features or OC-OLR.
SRD> Well, there's nothing we can do to prevent it, which makes it 
redundant to even say it.  So, I plan to do 1).  I'll wait until Monday 
to publish -07 (assuming we have resolution to all the issues) to give 
our European friends a chance to comment.
>
> Does this address everyone's concerns?
>
> Steve
>
> On 1/23/15 3:46 AM, Maria Cruz Bartolome wrote:
> See below
> Thanks
>
> - -----Original Message-----
> From: Ben Campbell [mailto:ben@nostrum.com]
> Sent: jueves, 22 de enero de 2015 22:34
> To: Maria Cruz Bartolome
> Cc: Steve Donovan; dime@ietf.org
> Subject: DOIC M-Bit usage (was Re: [Dime] WLGC #2 for draft-ietf-dime-ovli-06)
>
> - -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA512
>
>
> On Jan 22, 2015, at 10:41 AM, Maria Cruz Bartolome  wrote:
>
> A) About 'M' bit:
>
> My understanding of RFC6733:
>
>       The 'M' bit, known as the Mandatory bit, indicates whether the
>       receiver of the AVP MUST parse and understand the semantics of the
>       AVP including its content.  The receiving entity MUST return an
>       appropriate error message if it receives an AVP that has the M-bit
>       set but does not understand it.  An exception applies when the AVP
>       is embedded within a Grouped AVP.  See Section 4.4 for details.
>
>        4.4:
>    Receivers of a Grouped AVP that
>    does not have the 'M' (mandatory) bit set and one or more of the
>    encapsulated AVPs within the group has the 'M' (mandatory) bit set
>    MAY simply be ignored if the Grouped AVP itself is unrecognized.  The
>    rule applies even if the encapsulated AVP with its 'M' (mandatory)
>    bit set is further encapsulated within other sub-groups, i.e., other
>    Grouped AVPs embedded within the Grouped AVP.
>
>
> If the Grouped AVP does not have the 'M' bit set, but one (or more) of its sub-AVPs do have it, then the grouped AVP may be ignored (instead of sending an error) if the Grouped AVP itself is "unrecognized"
> But what "unrecognized" mean in this context? In my opinion, the grouped AVP is not recognized as long as mandatory sub-AVPs are missed, this includes conditionally mandatory (up to negotiation) sub AVPs.
> Then I would proposed a variant to your proposal 2 below:
>
> That's not what "unrecognized" typically means in IETF specs. The common usage is to mean that the recipient doesn't recognize it, or doesn't know what it means. This is  distinct from "malformed" meaning it wasn't constructed correctly.  Missing mandatory sub-AVPs would fall into the "malformed" category, not the "unrecognized" category. .
> By definition, a DOIC cannot claim OC-Supported-Features or OC-OLR as unrecognized.
>
>
> 3) sub-AVPs of DOIC grouped AVPs MUST NOT  have the m-bit set unless the sub-avp is mandatory or conditionally mandatory (i.e. part of an extension explicitly negotiated in the feature vector).
>
> Also, the M-bit doesn't mean the avp is mandatory to be present, just mandatory to be understood. By definition, you can't set the M-bit on an AVP that is not actually there.  (Other things may make it mandatory to be present, such as the feature or application definition, but that still doesn't necessarily mean it's mandatory to understand.) It's also possible that some new feature will involve an AVP that is not there all the time, but mandatory to understand when it is there..
>
> [MCruz] Any mandatory or conditionally mandatory AVP, it is as well mandatory to be understood by any DOIC-enabled.
>
> - -----BEGIN PGP SIGNATURE-----
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From nobody Fri Jan 23 07:43:33 2015
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To: Steve Donovan 
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Subject: Re: [Dime] DOIC M-Bit usage (was Re: WLGC #2 for draft-ietf-dime-ovli-06)
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512


On Jan 23, 2015, at 9:41 AM, Steve Donovan  wrote:

What's the point of 2)? It still introduces a way that a DOIC extension might cause the application transaction to fail. Do we want that?

On Jan 23, 2015, at 7:17 AM, Steve Donovan  wrote:

I would propose the following resolution to the M-bit issue:

1) We say that new extensions MUST NOT require the M-bit be set for new sub-AVPs of the OC-Supported-Features AVP or the OC-OLR AVP.

2) We indicate that if there a new extension includes behavior that requires 6733 defined M-bit behavior then the new extension can define a new AVP. It just can't make that new AVP part of OC-Supported-Features or OC-OLR.
SRD> Well, there's nothing we can do to prevent it, which makes it redundant to even say it.  So, I plan to do 1).  I'll wait until Monday to publish -07 (assuming we have resolution to all the issues) to give our European friends a chance to comment.


Works for me.
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From nobody Fri Jan 23 07:50:12 2015
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To: Steve Donovan 
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Subject: Re: [Dime] DOIC M-Bit usage (was Re: WLGC #2 for draft-ietf-dime-ovli-06)
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	charset=us-ascii

Hmm, looks like inline GnuPG messed up my quoting. Trying again:

> On Jan 23, 2015, at 9:41 AM, Steve Donovan  =
wrote:
>=20
> On 1/23/15 9:15 AM, Ben Campbell wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA512
>>=20
>> What's the point of 2)? It still introduces a way that a DOIC =
extension might cause the application transaction to fail. Do we want =
that?
>>=20
>> On Jan 23, 2015, at 7:17 AM, Steve Donovan  =
wrote:
>>=20
>> I would propose the following resolution to the M-bit issue:
>>=20
>> 1) We say that new extensions MUST NOT require the M-bit be set for =
new sub-AVPs of the OC-Supported-Features AVP or the OC-OLR AVP.
>>=20
>> 2) We indicate that if there a new extension includes behavior that =
requires 6733 defined M-bit behavior then the new extension can define a =
new AVP.  It just can't make that new AVP part of OC-Supported-Features =
or OC-OLR.
> SRD> Well, there's nothing we can do to prevent it, which makes it =
redundant to even say it.  So, I plan to do 1).  I'll wait until Monday =
to publish -07 (assuming we have resolution to all the issues) to give =
our European friends a chance to comment.
>=20

Works for me.

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Content-Disposition: attachment;
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Content-Type: application/pgp-signature;
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Content-Description: Message signed with OpenPGP using GPGMail

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From nobody Mon Jan 26 07:03:05 2015
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
 This draft is a work item of the Diameter Maintenance and Extensions Working Group of the IETF.

        Title           : Diameter AVP Level Security End-to-End Security: Scenarios and Requirements
        Authors         : Hannes Tschofenig
                          Jouni Korhonen
                          Glen Zorn
                          Kervin Pillay
	Filename        : draft-ietf-dime-e2e-sec-req-02.txt
	Pages           : 9
	Date            : 2015-01-26

Abstract:
   This specification discusses requirements for providing Diameter
   security at the level of individual Attribute Value Pairs.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dime-e2e-sec-req/

There's also a htmlized version available at:
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From nobody Mon Jan 26 13:10:42 2015
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
 This draft is a work item of the Diameter Maintenance and Extensions Working Group of the IETF.

        Title           : Diameter Overload Indication Conveyance
        Authors         : Jouni Korhonen
                          Steve Donovan
                          Ben Campbell
                          Lionel Morand
	Filename        : draft-ietf-dime-ovli-07.txt
	Pages           : 51
	Date            : 2015-01-26

Abstract:
   This specification defines a base solution for Diameter overload
   control, referred to as Diameter Overload Indication Conveyance
   (DOIC).


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A new version (-07) has been submitted for draft-ietf-dime-ovli:
http://www.ietf.org/internet-drafts/draft-ietf-dime-ovli-07.txt


The IETF datatracker page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-dime-ovli/

Diff from previous version:
http://www.ietf.org/rfcdiff?url2=draft-ietf-dime-ovli-07

Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

IETF Secretariat.


From nobody Mon Jan 26 13:12:49 2015
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Date: Mon, 26 Jan 2015 15:12:43 -0600
From: Steve Donovan 
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Subject: [Dime] DOIC-07
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All,

I have posted DOIC-07 with updates agreed to as part of WGLC.

I have also pushed the updates to github.

I will send a diff file in a separate email.

Thanks to everyone for the hard work getting the document ready for IESG 
review.

Regards,

Steve


From nobody Mon Jan 26 14:53:04 2015
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Date: Mon, 26 Jan 2015 15:15:38 -0600
From: Steve Donovan 
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Subject: [Dime] DOIC-06 to DOIC-07 diff file
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This is a multi-part message in MIME format.
--------------090607070002010502030405
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All,

I have attached the diff file showing changes between DOIC-06 and DOIC-07.

Regards,

Steve

--------------090607070002010502030405
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Date: Wed, 28 Jan 2015 12:32:54 -0800
From: Jouni Korhonen 
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Subject: Re: [Dime] DOIC-06 to DOIC-07 diff file
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Thanks Steve. I reviewed the changes and they look good to me.

- Jouni

1/26/2015, 1:15 PM, Steve Donovan kirjoitti:
> All,
>
> I have attached the diff file showing changes between DOIC-06 and DOIC-07.
>
> Regards,
>
> Steve
>
>
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