From nobody Wed Feb 14 10:30:50 2018 Return-Path: X-Original-To: int-dir@ietf.org Delivered-To: int-dir@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 849A712D834; Wed, 14 Feb 2018 10:30:48 -0800 (PST) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Carlos Bernardos To: Cc: draft-ietf-6man-ndpioiana.all@ietf.org, ipv6@ietf.org, ietf@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.72.1 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <151863304846.19314.5892046593012208855@ietfa.amsl.com> Date: Wed, 14 Feb 2018 10:30:48 -0800 Archived-At: Subject: [Int-dir] Intdir early review of draft-ietf-6man-ndpioiana-02 X-BeenThere: int-dir@ietf.org X-Mailman-Version: 2.1.22 List-Id: "This list is for discussion between the members of the Internet Area directorate." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Feb 2018 18:30:49 -0000 Reviewer: Carlos Bernardos Review result: Ready I've reviewed the draft and I believe it is ready. I have no further comments. From nobody Fri Feb 16 11:03:24 2018 Return-Path: X-Original-To: int-dir@ietf.org Delivered-To: int-dir@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 3E9D612AF84; Fri, 16 Feb 2018 11:03:23 -0800 (PST) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Tim Chown To: Cc: draft-ietf-6lo-rfc6775-update.all@ietf.org, 6lo@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.72.2 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <151880780322.1421.18212675472479984996@ietfa.amsl.com> Date: Fri, 16 Feb 2018 11:03:23 -0800 Archived-At: Subject: [Int-dir] Intdir early review of draft-ietf-6lo-rfc6775-update-11 X-BeenThere: int-dir@ietf.org X-Mailman-Version: 2.1.22 List-Id: "This list is for discussion between the members of the Internet Area directorate." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 Feb 2018 19:03:23 -0000 Reviewer: Tim Chown Review result: Almost Ready Hi, I have performed an early review of draft-ietf-6lo-rfc6775-update-11. This draft updates and enhances the mechanisms defined in RFC6775 to support IPv6 operation over low power networks (6LoWPAN ND). Overall the draft is well-written and structured. General comments: -------------------------------------- The document could use a glossary of terms: LLN, 6LN, 6LBR, 6LR, BBR, etc. The introduction could talk of other new added features, like avoiding DAD for link locals. The document includes RFC 7217 in the references, but doesn't include discussion of it in the main body of the text. Shouldn't RFC 7217 be considered the norm here rather than address generation as per RFC 4862? Related, RFC 8064 "recommends against embedding stable link-layer addresses in IPv6 Interface Identifiers". The document is inconsistent - it talks of using EUI64, then in Section 9 not using EUI64. Specific comments: -------------------------------------- p.3 Section 2, para 2 - should ND cache exhaustion attacks be included in the list here? p.4 Section 3 - Add RFC 7217 to RFC 4862? It's recommended by RFC 8064. p.6 Section 4 - for a node to prefer registering to a 6LR that supports the spec, it would need to enumerate all available 6LRs; should the process for this be described here, or is it included in sufficient detail in RFC 6775? p.7 Section 4.1 - "not required to be a MAC address" - as per my general comment above, with current IETF thinking, should this not be stronger, e.g. "SHOULD NOT be a MAC address"? Section 9 says this? p.9 Section 4.2, point 4 - I find this quite para quite hard to read. p.9 Section 4.3, para 1 - again, is using EUI-64 desirable? Is the point to allow header compression as per RFC4944? Discuss the tradeoff? Section 4.3 para 2 - so a different type of identifier could be an RFC 7217 generated identifier? p.11 Section 4.6 - in the case of two 6LRs with the same link-layer addresses, does it matter which a 6LN chooses? Is the choice algorithmic? Section 4.6 - the last para on p.11 seems to be repeated in the first para on p.12? p.12 Section 4.6 - again, is the recommendation to use an (expected to be) unique LL address in keeping with RFC 8064? p.13 Para 4 - a Moved message SHOULD be used, yet elsewhere a node MUST clean up its stale state? Consistent? What about MIPv6-like spoofing security issues? You say "an alternate protocol" - isn't this a little hand-wavy; shouldn't a single mechanism be defined rather than multiple (undefined) mechanisms? p.15 OUI is a confusing choice of term, given OUIs in MAC addresses; I guess this is now baked into RFC 6775 though. p.16 I don't think codes 5 and 10 are explained/defined in any detail here? How is the challenge made? p.16 The registration lifetime is in minutes; why not in seconds? p.18 Section 6.3 - SHOULD set the E flag; why not a MUST? Why would you support the spec, but not advertise that you do? In contrast, on the next page in Section 7.1.1 you say nodes MUST set it. p.19 Section 7.1.2 para 2 - would a LL address generally be used here as source? Should that be a SHOULD? Using a temporary address is probably not ideal. p.20 Section 7.3 para 4 - is this consistent with p.19 last para saying a 6LN MUST use the updated spec once it knows it's supported? The last two paras here are a bit vague/loose. p.21 Section 8, para 3 - recommends using privacy techniques, but uses EUI64? p.22 Limit the number of addresses? What about RFC 7934? The type of algorithm described here might be better defined generically for 6LoWPAN and 'real' IPv6? I don't think anything has been defined for ND cache exhaustion attack mitigation - would a separate draft be beneficial? I suspect current solutions are vendor specific? p.22 What trust model? p.22 Section 9 - EUI64, or not EUI64? Inconsistent. Does anyone really use SeND? Especially in 6LoWPAN networks? p.24 Section 10.3 - statuses 5 and 10 are not detailed in the draft? p.30 The multicast issues text could cite the new mboned draft on this topic. "Plague" is maybe strong! p.30 Appendix B - can we have a table showing WHICH requirements have been met by the draft? Nits: -------------------------------------- p.4 Section 2 - "form and use multiple addresses" (add multiple) p.4 Section 2 last para - "their" rather than "his" p.6 "provides new" -> "provide new" p.10 "route-over mesh" - add to definitions section p.12 First line of last para needs rewriting - "If the registry in the 6LBR is be saturated, in which case the LBR". p.13 Could forward reference the summary of error codes in 6.1 or 10.3 here? p.14 "removes silently" -> "silently removes" "LLNs meshes" -> "LLN meshes" p.15 Code 3; change tense to past tense, e.g. "fails" to "failed" p.19 "capabilities" -> "capabilities is" "such address" -> "such an address" "in a" -> "in" "6LB" -> "6LN" ? p.21 "amlways" -> "always" "to using" -> "using" Missing close bracket for See Section 9. p.30 Do you mean "sequence"? "serves" -> "serves the" p.31 "timely" -> "in a timely fashion" ? B.1 last req - reword this. The BIER Architecture is now an RFC I think? 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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Feb 2018 10:14:08 -0000 Reviewer: Tim Chown Thanks a bunch Tim! I answered with a prefix >=20 There are specific questions back to you down there. Please feel free to re= move all Q/As for which we found an agreement already. General comments: -------------------------------------- The document could use a glossary of terms: LLN, 6LN, 6LBR, 6LR, BBR, etc. > Done in appendix ******************* The introduction could talk of other new added features, like avoiding DAD = for link locals. > You'll note that it is not avoided. But it is scoped in the relationship = between the 6LN and the 6LR. One 6LR may accept to talk to a 6LN LN_A seen = as LLA Addr_A and then later another 6LR may refuse that same Addr_A becaus= e from its standpoint Addr_A duplicates a LLA used by another device that i= s also talking to. The draft does not change what a LLA can be used for in = route over, that is one radio hop; mostly, it reduces the illusion that a l= ink local address can be DAD'ed in a network that is not fully and permanen= tly connected.=20 =20 > Added: " Simplify the registration flow for link-local addresses " =20 as a clarification instead of:=20 " =20 Reduce requirement of registration for link-local addresses " The document includes RFC 7217 in the references, but doesn't include discu= ssion of it in the main body of the text. Shouldn't RFC 7217 be considered= the norm here rather than address generation as per RFC 4862?=20 > added: " "A Method for Generating Semantically Opaq= ue Interface Identifiers with IPv6 Stateless Address Autoconfiguration (SL= AAC)" is the recommended method for generating Interface Identifiers = to=20 be used in SLAAC at the time of this writing. " ********************** Related, RFC 8064 "recommends against embedding stable link-layer addresses= in IPv6 Interface Identifiers". The document is inconsistent - it talks of us= ing EUI64, then in Section 9 not using EUI64. > fact is, a typical IEEE802.15.4-based network will compress the IPv6 addr= ess based on the MAC address. But it does not have to be so, and it does no= t apply to all types of networks. > new updated proposed text: " The IPv6 address of the 6LN in the IPv6 header can be compressed statelessly Interface Identifier in the IPv6 address can be derived fro= m the Lower Layer address. When it is not critical to benefit from that=20 compression, e.g. the address can be compressed statefully, or it is ra= rely used and/or it is used only over one hop, then the best practice of for= ming privacy addresses should be considered: "A Method for Generating Semantically Opaq= ue Interface Identifiers with IPv6 Stateless Address Autoconfiguration (SL= AAC)" is the recommended method for generating Interface Identifiers = to=20 be used in SLAAC at the time of this writing. " this is followed by existing text: " =20 "Privacy Considerations for IPv6 Adaptation-Layer Mechanisms" explains why privacy is important and how to form such addresses. All implementations and deployment must consider the option of privacy addresses in their own environment. Also future specifications involving 6LoWPAN Neighbor Discovery should consult "Recommendation on Stable IPv6 Interface Identifiers" for default interface identification. " ********************** Specific comments: -------------------------------------- p.3 Section 2, para 2 - should ND cache exhaustion attacks be included in the l= ist here? > If the method is used as a full replacement of reactive ND, then there ca= n be some control. e.g. we'd be immune from NCE DOS attack from a remote pa= rty. But it's a touchy space. In the one hand, we never block from using bo= th, IOW classical (reactive) ND in conjunction with the new (proactive) reg= istration. Also a local node could still attack the cache by performing ton= s of registrations, forging MAC addresses as it goes if need be. It will t= ake separate work to address all the security requirements (AP-ND https://t= ools.ietf.org/html/draft-ietf-6lo-ap-nd and more). ********************** p.4 Section 3 - Add RFC 7217 to RFC 4862? It's recommended by RFC 8064. > This is a terminology section. Are there terms we need from RFC 7217? Not= e that this specification does not dictate how to form address, just manage= s them. Still it places recommendation to the protocol developers coming ne= xt (e.g. for a particular link layer) to consider privacy. Text related to = RFC 7217 is added in section 9 per your other comment. ********************** p.6 Section 4 - for a node to prefer registering to a 6LR that supports the spe= c, it would need to enumerate all available 6LRs; should the process for th= is be described here, or is it included in sufficient detail in RFC 6775? > You are correct. There is no enumeration process; 6LRs are discovered as = described in RFC 6775 sections 5.2 and 5.3. by sending out mcast RS. This d= ocument updates RFC 6775 but we avoided paraphrasing it as much as we could= , considering that this doc is already quite thick.=20 Still I added the first line of the text below: " Section 5 of specifies how a 6LN bootstr= aps an interface and locates available 6LRs; a Registering Node SHOULD prefer registering to a 6LR that is found to support this specification, as discussed in , over a legacy one. " ********************** =20 p.7 Section 4.1 - "not required to be a MAC address" - as per my general commen= t above, with current IETF thinking, should this not be stronger, e.g. "SHO= ULD NOT be a MAC address"? Section 9 says this? > I see where you're coming from and htat makes sense to me. But the WG nev= er went that far. Note that this is not a subfield in an address; as it goe= s the message is not not supposed to leak outside. RFC 6775 forced the UID = to be a MAC address in the EUI-64 form. This specification does not depreca= te the legacy behavior and it allows for something else. But it recommends= (section 8) to use a privacy technique such as AP-ND instead. Once AP-ND i= s standard, we can deprecate the legacy behavior if the WG finds it relevan= t, e.g. when we apply it to networks that are more sensitive to privacy. ********************** p.9 Section 4.2, point 4 - I find this quite para quite hard to read. > Agreed, it is inlined from RFC 6550 as opposed to referenced per WG and s= hepherd decision. I simplified to: " =09 If two sequence numbers are determined to be not comparable, i.e. the results of the comparison are not defined, then a node should give precedence to the sequence number that was most recently incremented. Failing this, the node should select the sequence numb= er=20 in order to minimize the resulting changes to its own state. " ********************** p.9 Section 4.3, para 1 - again, is using EUI-64 desirable? Is the point to al= low header compression as per RFC4944? Discuss the tradeoff? Section 4.3 p= ara 2 - so a different type of identifier could be an RFC 7217 generated id= entifier? > It could be many things but collisions should be avoided. It should not b= e an interface ID since this is to complement the DAD of the IID. AP-ND bui= lds it on cryptography. Your point is excellent, unsure if this doc should = be the vessel for it. At this stage, we never argued deprecation before, ju= st extension. It will take WG work to define possible replacements and this= doc may be too advanced for that I guess, but I'll ask. ********************** p.11 Section 4.6 - in the case of two 6LRs with the same link-layer addresses, d= oes it matter which a 6LN chooses? Is the choice algorithmic? Section 4.6 = - the last para on p.11 seems to be repeated in the first para on p.12? > This specification (including RFC 6775) does not have a router preference= (whether they have a same or different LLA) beyond RFC 4191. RPL does, bas= ed on Rank and the upcoming enrollment specification will also hint on that= . And apparently yes to your other point, cleaning up. ********************** p.12 Section 4.6 - again, is the recommendation to use an (expected to be) uniqu= e LL address in keeping with RFC 8064? > There is a chicken and an egg problem with the first registration of the = first LLA. It is better that it does not fail. RFC6775 stipulates that MAC-= derived LLA do not need DAD. This message flies over one hop, between a nod= e and its nearby router. The node may then form as many privacy LL and GUA = as it likes.=20 ********************** p.13 Para 4 - a Moved message SHOULD be used, yet elsewhere a node MUST clean up= its stale state? Consistent? What about MIPv6-like spoofing security issu= es? You say "an alternate protocol" - isn't this a little hand-wavy; should= n't a single mechanism be defined rather than multiple (undefined) mechanis= ms? > Agreed. That single mechanism is DAR/DAC. I removed the "an alternate pro= tocol"; what was meant is now separately drafted in draft-thubert-roll-unaw= are-leaves. This is where using RPL to proxy the registration is described.= Unsure about which MIP attack you have in mind? ********************** p.15 OUI is a confusing choice of term, given OUIs in MAC addresses; I guess thi= s is now baked into RFC 6775 though. > Actually no. RFC 6775 uses EUI-64 throughout. We picked that term to gene= ralize the EUI-64, so I guess we can still change that name. I changed it t= o Registration Unique ID (RUID) but that does not sound so right; would you= have suggestions? > I'll take that question to the WG separately. ********************** p.16 I don't think codes 5 and 10 are explained/defined in any detail here? How= is the challenge made? > This is used in a freference spec. I clarified that by adding 3 lines at = the end of the text in the RUID (ex OUID) section which now reads: " The Registration Unique ID in is a EUI-64 globally unique address configured at a Lower Layer, under the assumption that duplicate EUI-64 addresses are avoided. With this specification, the Registration Unique ID is allowed to be extended to different types of identifier, as long as the type is clear= ly indicated. For instance, the type can be a cryptographic string and used to prove the ownership of the registration as discussed in "Address Protected Neighbor Discovery for Low-power and Lossy Networks" . In order to support the flows related to the proof of ownership, this specification introduces new status codes "Validation Requested" a= nd "Validation Failed" in the EARO.=20 " ********************** p.16 The registration lifetime is in minutes; why not in seconds? > RFC 6775 is missing a way to express the time unit (RPL has one).=20 We used minutes because a typical LLN operates at a very slow pace, and a t= ypical device is like a three-toed sloth that would sleep more than a cat. = We even had a requirement to produce an 'infinite' lifetime for the likes o= f light bulbs but never took it that slow. We could change the format but t= hat would not be backward compatible. > I'll take that question to the WG separately=20 ********************** p.18 Section 6.3 - SHOULD set the E flag; why not a MUST? Why would you support= the spec, but not advertise that you do? In contrast, on the next page in= Section 7.1.1 you say nodes MUST set it. > fixed, it was a MUST :) ********************** p.19 Section 7.1.2 para 2 - would a LL address generally be used here as source?= =20 Should that be a SHOULD? Using a temporary address is probably not ideal. > RFC 6775 used the registered address (LL or GUA) as source and the target= was not really important. With this specification, register the target of = the NS, and there is no point remembering the source address of the registr= ation NS after the NA was sent back. A 6LR can talk to the registered addre= ss using the registered address. ********************** p.20 Section 7.3 para 4 - is this consistent with p.19 last para saying a 6LN MU= ST use the updated spec once it knows it's supported? The last two paras he= re are a bit vague/loose. > I turned the text into: " After detecting a legacy 6LR, an updated 6LN SHOULD attempt to find a= n alternate 6LR that is updated for a reasonable time that depends on th= e type of device and the expected deployment. " ********************** p.21 Section 8, para 3 - recommends using privacy techniques, but uses EUI64? > RFC 6775 uses EUI. AP-ND uses a cryptographically generated token instead= . This section effectively recommends AP-ND or whatever else cmes next that= has privacy concerns. ********************** p.22 Limit the number of addresses? What about RFC 7934? The type of algorithm described here might be better defined generically fo= r 6LoWPAN and 'real' IPv6? I don't think anything has been defined for ND = cache exhaustion attack mitigation - would a separate draft be beneficial? = I suspect current solutions are vendor specific? > We applied wisdom from RFC9734 and removed text that indicated that an ad= ministrator could be on the path of accepting an address or not. I know for= having coded it that yes, (at least some) vendors provide a protection in = the number of addresses that can be registered or snooped from a given devi= ce wen there is a limit for the overall resources to serve the network. A c= lassical NCE is a cache but a 6LR NCE is really a hard state that the regis= trar guarantees to maintain for a given lifetime. The fact that a protectio= n can be configured does not force a user in a particular deployment to us= e that protection. I agree that there is a need for NCE attack mitigation f= or both classical ND and 6LoWPAN ND. But till that spec exists, we cannot f= orce the 6LR device to drop all protection against a misbehaving 6LN. A 6LR= is an IOT device and it might easily be pushed beyond capacity.=20 ********************** p.22 What trust model? > Should I add words? Those networks are always protected at Layer 2. But r= eally, we'd like to see a draft that enables a 6LBR to prove it has that ca= pacity and is entitled to play the role for the network. This is beyond the= scope of this particular draft and should be done in a security related 6L= oWPAN draft. ********************** p.22 Section 9 - EUI64, or not EUI64? Inconsistent. Does anyone really use SeND? Especially in 6LoWPAN networks? > There are 2 uses of EUI that must be differentiated. The OUID (now RUID) = is a unique ID for the device to correlate registrations for DAD between ho= nest people. This section ere talks about IID in the IPv6 address. The text= explains that no, SEND cannot be used in that space. This is why we do AP-= ND instead. With AP-ND, the OUID is used to prove cryptographically the own= ership of the registered address a bit like CGA does, but it is not part of= the address. It is stored upon the first registration f an address and use= d later to validate that the new registration comes from the same guy. ********************** p.24 Section 10.3 - statuses 5 and 10 are not detailed in the draft? > Added text upon your point earlier=20 ********************** p.30 The multicast issues text could cite the new mboned draft on this topic. "Plague" is maybe strong! > done the ref. Added draft-perkins as well. replaced "plague" with "affect= the operation of" ********************** p.30 Appendix B - can we have a table showing WHICH requirements have been met b= y the draft? > added Note to RFC Editor: please replace "This" by the RFC number for this specif= ication once it is attributed. I-drafts/RFCs addressing requirements Requirement Document =20 Req1.1 Req1.2 Req1.3 Req1.4 This Req2.1 This Req2.2 This Req2.3 =20 Req3.1 Technology Dependant Req3.2 Technology Dependant Req3.3 Technology Dependant Req3.4 Technology Dependant =20 Req4.1 This Req4.2 This Req4.3 =20 Req5.1 Req5.2 Req5.3 Req5.4 Req5.5 Req5.6 Req5.7 Req5.8 Req5.9 =20 Req6.1 This Req6.2 This =20 =20 =20 ********************** Nits: -------------------------------------- p.4 Section 2 - "form and use multiple addresses" (add multiple) > done ********************** p.4 Section 2 last para - "their" rather than "his" > sorry I do not see this ? the "his" refers to the network admin. ********************** p.6 "provides new" -> "provide new" > done ********************** p.10 "route-over mesh" - add to definitions section > added reference to RFC 6606 in the terminology section ********************** p.12 First line of last para needs rewriting - "If the registry in the 6LBR is b= e saturated, in which case the LBR". > I had spoted that one too : ) fixed as =20 " If the registry in the 6LBR is saturated, the LBR cannot guarantee that a new address is effectively not a duplicate. " ********************** p.13 Could forward reference the summary of error codes in 6.1 or 10.3 here? > done ********************** p.14 "removes silently" -> "silently removes" "LLNs meshes" -> "LLN meshes" > done ********************** p.15 Code 3; change tense to past tense, e.g. "fails" to "failed" > done ********************** p.19 "capabilities" -> "capabilities is" "such address" -> "such an address" "in a" -> "in" "6LB" -> "6LN" ? > done.=20 ********************** p.21 "amlways" -> "always" "to using" -> "using" Missing close bracket for See Section 9. ********************** p.30 Do you mean "sequence"? "serves" -> "serves the" > changed to " This specification extends 6LoWPAN ND to provide a sequence number to th= e registration and ... " ********************** p.31 "timely" -> "in a timely fashion" ? B.1 last req - reword this. The BIER Architecture is now an RFC I think? > will fix the reference to RFC 8279 Thanks a bunch again for your deep review Tim! Pascal -----Original Message----- From: 6lo [mailto:6lo-bounces@ietf.org] On Behalf Of Tim Chown Sent: vendredi 16 f=E9vrier 2018 20:03 To: int-dir@ietf.org Cc: draft-ietf-6lo-rfc6775-update.all@ietf.org; 6lo@ietf.org Subject: [6lo] Intdir early review of draft-ietf-6lo-rfc6775-update-11 Reviewer: Tim Chown Review result: Almost Ready Hi, I have performed an early review of draft-ietf-6lo-rfc6775-update-11. This draft updates and enhances the mechanisms defined in RFC6775 to suppor= t IPv6 operation over low power networks (6LoWPAN ND). Overall the draft is well-written and structured. General comments: -------------------------------------- The document could use a glossary of terms: LLN, 6LN, 6LBR, 6LR, BBR, etc. The introduction could talk of other new added features, like avoiding DAD = for link locals. The document includes RFC 7217 in the references, but doesn't include discussion of it in the main body of the text. Shouldn't RFC 7217 be considered the norm here rather than address generation as per RFC 4862?=20 Related, RFC 8064 "recommends against embedding stable link-layer addresses= in IPv6 Interface Identifiers". The document is inconsistent - it talks of us= ing EUI64, then in Section 9 not using EUI64. Specific comments: -------------------------------------- p.3 Section 2, para 2 - should ND cache exhaustion attacks be included in the l= ist here? p.4 Section 3 - Add RFC 7217 to RFC 4862? It's recommended by RFC 8064. p.6 Section 4 - for a node to prefer registering to a 6LR that supports the spe= c, it would need to enumerate all available 6LRs; should the process for this = be described here, or is it included in sufficient detail in RFC 6775? p.7 Section 4.1 - "not required to be a MAC address" - as per my general commen= t above, with current IETF thinking, should this not be stronger, e.g. "SHOUL= D NOT be a MAC address"? Section 9 says this? p.9 Section 4.2, point 4 - I find this quite para quite hard to read. p.9 Section 4.3, para 1 - again, is using EUI-64 desirable? Is the point to al= low header compression as per RFC4944? Discuss the tradeoff? Section 4.3 para = 2 - so a different type of identifier could be an RFC 7217 generated identifier= ? p.11 Section 4.6 - in the case of two 6LRs with the same link-layer addresses, d= oes it matter which a 6LN chooses? Is the choice algorithmic? Section 4.6 - th= e last para on p.11 seems to be repeated in the first para on p.12? p.12 Section 4.6 - again, is the recommendation to use an (expected to be) uniqu= e LL address in keeping with RFC 8064? p.13 Para 4 - a Moved message SHOULD be used, yet elsewhere a node MUST clean up= its stale state? Consistent? What about MIPv6-like spoofing security issues? Y= ou say "an alternate protocol" - isn't this a little hand-wavy; shouldn't a si= ngle mechanism be defined rather than multiple (undefined) mechanisms? p.15 OUI is a confusing choice of term, given OUIs in MAC addresses; I guess thi= s is now baked into RFC 6775 though. p.16 I don't think codes 5 and 10 are explained/defined in any detail here? How= is the challenge made? p.16 The registration lifetime is in minutes; why not in seconds? p.18 Section 6.3 - SHOULD set the E flag; why not a MUST? Why would you support= the spec, but not advertise that you do? In contrast, on the next page in Sect= ion 7.1.1 you say nodes MUST set it. p.19 Section 7.1.2 para 2 - would a LL address generally be used here as source?= =20 Should that be a SHOULD? Using a temporary address is probably not ideal. p.20 Section 7.3 para 4 - is this consistent with p.19 last para saying a 6LN MU= ST use the updated spec once it knows it's supported? The last two paras here = are a bit vague/loose. p.21 Section 8, para 3 - recommends using privacy techniques, but uses EUI64? p.22 Limit the number of addresses? What about RFC 7934? The type of algorithm described here might be better defined generically fo= r 6LoWPAN and 'real' IPv6? I don't think anything has been defined for ND ca= che exhaustion attack mitigation - would a separate draft be beneficial? I susp= ect current solutions are vendor specific? p.22 What trust model? p.22 Section 9 - EUI64, or not EUI64? Inconsistent. Does anyone really use SeND? Especially in 6LoWPAN networks? p.24 Section 10.3 - statuses 5 and 10 are not detailed in the draft? p.30 The multicast issues text could cite the new mboned draft on this topic. "Plague" is maybe strong! p.30 Appendix B - can we have a table showing WHICH requirements have been met b= y the draft? Nits: -------------------------------------- p.4 Section 2 - "form and use multiple addresses" (add multiple) p.4 Section 2 last para - "their" rather than "his" p.6 "provides new" -> "provide new" p.10 "route-over mesh" - add to definitions section p.12 First line of last para needs rewriting - "If the registry in the 6LBR is b= e saturated, in which case the LBR". p.13 Could forward reference the summary of error codes in 6.1 or 10.3 here? p.14 "removes silently" -> "silently removes" "LLNs meshes" -> "LLN meshes" p.15 Code 3; change tense to past tense, e.g. "fails" to "failed" p.19 "capabilities" -> "capabilities is" "such address" -> "such an address" "in a" -> "in" "6LB" -> "6LN" ? p.21 "amlways" -> "always" "to using" -> "using" Missing close bracket for See Section 9. p.30 Do you mean "sequence"? "serves" -> "serves the" p.31 "timely" -> "in a timely fashion" ? B.1 last req - reword this. 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by XCH-RCD-001.cisco.com ([173.37.102.11]) with mapi id 15.00.1320.000; Mon, 26 Feb 2018 11:25:58 -0600 From: "Pascal Thubert (pthubert)" To: iot-dir , "ops-dir@ietf.org" , "int-dir@ietf.org" CC: "anima@ietf.org" , "draft-ietf-anima-autonomic-control-plane@ietf.org" Thread-Topic: An IOT DIR review of draft-ietf-anima-autonomic-control-plane Thread-Index: AdOnCBzSJMKw+zXyQYGzXbZB1Jtadg== Date: Mon, 26 Feb 2018 17:25:58 +0000 Deferred-Delivery: Mon, 26 Feb 2018 17:25:22 +0000 Message-ID: <449b7e2f10094531b325919710696754@XCH-RCD-001.cisco.com> Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.61.212.148] Content-Type: multipart/alternative; boundary="_000_449b7e2f10094531b325919710696754XCHRCD001ciscocom_" MIME-Version: 1.0 Archived-At: Subject: [Int-dir] An IOT DIR review of draft-ietf-anima-autonomic-control-plane X-BeenThere: int-dir@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "This list is for discussion between the members of the Internet Area directorate." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Feb 2018 17:26:08 -0000 --_000_449b7e2f10094531b325919710696754XCHRCD001ciscocom_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Reviewer: Pascal Thubert on behalf of IOT-DIR; I am an assigned IoT directorate reviewer for draft-ietf-anima-autonomic-co= ntrol-plane-13. These comments were written primarily for the benefit of the INT and OPS Ar= eas Directors from the IoT perspective. Document editors and shepherd(s) sh= ould treat these comments just like they would treat comments from any othe= r IETF contributors and resolve them along with any other Last Call comment= s that have been received. For more details on the IoT Directorate, please = see https://datatracker.ietf.org/group/iotdir/about/ and for Directorates i= n general please see https://www.ietf.org/about/groups/directorates/. I'll be away for the next 2 weeks and could not finish the review in time = for this heavy document, but at least I made it through till the RPL sectio= n. In the interest of time, let me share what I already have. Summary ------------- The summary of the review is that the document is Ready for Publication, wi= th comments. Major comments ------------------------ - " in-band" and "out of band network " should be defined since it is fundamental to understand that the ACP takes = place in the same physical links as the data plane, as opposed to dedicated= management ports (correct?); - Section 3; the IOT certainly could use an ACP. It would be usefu= l to scope the feature that is proposed in this document, whether it is com= patible of not with constrained environments, whether it needs adaptations,= point on Michael's enrollment draft. It would also be useful to indicate w= hether the ACP works between L3 bridges, IOW whether ACP operates the same = (over IP) regardless of the packet forwarding layer in the data plane; - " Inside the ACP VRF, each node sets up a loopback interface with= its ULA IPv6 address" This is the first time, IPv6 is discussed; would have been nice to introduc= e that the Node has IPv6, that it needs a ULA and that ACP assigns it. This= discussion could be done in conjunction with the comment above; - About "The ttl parameter SHOULD be 3.5 times the period so that up to three consecutive messages can be dropped before considering an - announcement expired. " This is the only discussion on the ttl field of the M_FLOOD. Though its mea= ning is quite obvious, the behavior associated to it should be defined. - "In the above (recommended) example the period of sending of the" Is this RECOMMENDED IOW normative?? - Text P 25 says "At this time in the lifecycle of ACP nodes, it is= unclear whether it is feasible to even decide on a single MTI (mandatory to implement) security association protocol across all ACP nodes" but then P27 "It MUST support ESP with AES256 for encryption and SHA256 hash and MUST NOT permit weaker crypto options." and then " A baseline ACP node MUST support IPsec natively and MAY suppor= t IPsec via GRE. A constrained ACP node MUST support dTLS. ACP nodes connecting constrained areas with baseline areas MUST therefore support IPsec and dTLS." Seems that text P25 should go? - "Use-ULA: For loopback interfaces of ACP nodes, we use Unique L= ocal Addresses (ULA), specifically ULA-Random, as defined in [[RFC4193] with L=3D1]." This needs to be more crisp. ULA is defined in RFC 4193 but the term ULA-Ra= ndom is not. I think you mean that 3.2.2. of RFC 4193 is the way addresses= are formed, if so please say so. The best practice RFC 8064 recommends us= e of RFC 7217. I understand that privacy is not a concern but does it hurt?= Anyway please point at section 6.10 and 6.11.1.11 - " RPL Mode of Operations (MOP): mode 3 "Storing Mode of Operations with multi= cast support". Implementations should support also other modes. Note: Root indicates mode in DIO flow" Why "should" ? there is no much point supporting the other modes is there? = Section 6.11.1.13 says that SRH is not used so this is inconsistent. You on= ly need MOP 2 or 3, 3 is you do multicast which at the moment does not appe= ar to be the case. SO I would MUST a MOP of 2 and MAY a MOP of 3 which is a= superset of MOP 2, and that's it (see 6.3.1 of RFC 6550). - "The lack of a RPI (the header defined by [RFC6553]), means tha= t the data-plane will have no rank value that can be used to detect loops. As a result, traffic may loop until the TTL of the packet reaches zero. " Since we have reliable links and no stretch (section 6.11.1.7), loops shoul= d be exceedingly rare. It could be recommended to send the DIOs 2-3 times t= o inform children when losing the last parent. Note that the technique in s= ection "8.2.2.6. Detaching" of RFC 6550 should be favored over that in sec= tion "8.2.2.5. Poisoning" because it allows local connectivity. Also, It s= hould be said that a node should select more than one parent, at least 3 if= possible, and send DAOs to all of then in parallel. This provides multi - "ACP nodes MUST perform standard IPv6 operations across ACP vir= tual interfaces including SLAAC (Stateless Address Auto-Configuration - RFC4862])" They may actually prefer Optimistic DAD RFC 4429 since address duplication = is highly improbable as long as you . Minor comments ------------------------ - About "[RFC7575] defines the fundamental ... " for readability, it may be nicer to indicate the title of an RFC when it is= referenced first; e.g. the text above would become " Autonomic Networking: Definitions and Design Goals" [RFC7575] defines the= fundamental ... - about "or network plane (there is no well-established name for t= his)" The term network plane is not used again in the document. This text may go = away. You may consider using "security and transport substrate" instead, si= nce it is used elsewhere in the document. Also, please be consistent on whe= ther you use hyphen or not and use that globally, e.g. for the above, and p= ane like in "forwarding plane" or "out of band network "; - "data-plen" Typo? - "OAM applications ("Operations Administration and Management)" Consider using "Operations Administration and Management (OAM) applications= " instead; same goes for SDN, ASA, VRF, etc... - " MIC: "Manufacturer Installed Certificate". Another word no= t used in this document to describe an IDevID." MIC is not used in the document, maybe inform of this equivalence in the ID= evID definition instead; same goes for SUDI. Note that UDI is use just once= and may not need an entry here. - "RPL: \"IPv6 Routing Protocol for Low-Power and Lossy Netw= orks\". The routing protocol used in the ACP." Maybe point on [RFC6550]? - "Connecting over non-ACP Layer-3 clouds initially requires a tunn= el between ACP nodes." I understands that it is one tunnel between each pair of adjacent ACP nodes= , correct? I read "a tunnel" as an end-to-end tunnel, which sounds differen= t - "ACP relies on group security" Add "The" - "An ACP node MUST have keying material consisting of a certificate (LDevID), with which it can cryptographically assert its membership in the ACP domain and trust anchor(s) associated with that certificate with which it can verify the membership of other nodes (see Section 6.1.2)." This is convoluted. Could you make it 2 sentences? - " Note: LDevID ("Local Device IDentification") is the term used = to indicate a certificate that was provisioned by the owner of a node as opposed to IDevID ("Initial Device IDentifier") that may has been loaded on the node during manufacturing time. Those IDevID do not include owner and deployment specific information to allows autonomic establishment of trust for the operations of an ACP domain (e.g.: between two ACP nodes without relying on any third party)." LDevID was already defined in the terminology. This text may move there or = go away. - " This document uses the term ACP in many places where its ref= erence document use the word autonomic." Add [RFC7575] after "reference document" - " "routing-subdomain" is the autonomic subdomain that is used = to calculate the hash for the ULA prefix of the ACP address of the node." Do you mean ULA suffix? - " o If the node certificates indicate a CDP (or OCSP) then th= e peer's certificate must be valid according to those criteria. e.g.: OCSP check across the ACP or not listed in the CRL retrieved from the CDP." Please define CDP and OSCP, and/or reference a RFC is possible. Helper: Online Certificate Status Protocol (OCSP) Certificate Revocation L= ist (CRL) Distribution Point (CDP) - "enrolment" Typo - "This can use a single GRASP M_FLOOD message as shown in above example." Actually the example is now below. Please reference the figure. - "The protocol could for example could have been" Typo - "if the IPsec connecting" Typo? - "ACP wide service discovery" ACP-wide - "if the IPsec connecting In most other solution designs such distributed discovery does not exist at all or was added as an afterthought and relied upon inconsistently" Consider removing or rephrasing : ) - Maybe consider moving the discussion on multicast P29 -30 to anne= x? Why Multicast is not used is an interesting discussion but not critical = for the protocol operation. - "it is not quite clear yet what exactly the implications are to make GRASP flooding depend on RPL DODAG convergence and how difficult it would be to let GRASP flooding access the DODAG information" Let's chat then. There's work on reliable multicast for RPL using BIER. - "In the terminology of GRASP ([I-D.ietf-anima-grasp]), the ACP is= the security and transport substrate for the GRASP instance run inside the ACP ("ACP GRASP"). " "running" inside the ACP? Maybe rephrase more globally? - - "OAM protocols no not require IPv4: The ACP may carry OAM " Typo no->do - "Consider a network that has multiple NOCs in different locatio= ns. Only one NOC will become the DODAG root. Other NOCs will have to send traffic through the DODAG (tree) rooted in the primary NOC." A figure would help. I remember all the discussions we had about setting th= e prf bits in remote NOCs - "RPPL." Typo - "Administrative Preference ([RFC6552], 3.2.6 " The section is correct but that is RFC 6550. - "This is a standard issue with tunneling, not specific to running the ACP across it." Do you really mean Standard or would Classical work better? - "Even though loopback interfaces where originally d" Typo Where -> were - Section 3, 4, 9 and 10 may move to Annex (by moving the section a= fter the tag) since they are not normative and do not contrib= ute to the understanding of the protocol. This way there should not be a ne= ed to indicate normative in other sections. - Well Noted that Section 14 Will be removed/. Sorry for being interrupted here, Pascal --_000_449b7e2f10094531b325919710696754XCHRCD001ciscocom_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Reviewer: Pascal Thubert on behalf of IOT-DIR;

 

I am an assigned IoT directorate reviewer for dra= ft-ietf-anima-autonomic-control-plane-13.

 

These comments were written primarily for the ben= efit of the INT and OPS Areas Directors from the IoT perspective. Document = editors and shepherd(s) should treat these comments just like they would tr= eat comments from any other IETF contributors and resolve them along with any other Last Call comments that have been re= ceived. For more details on the IoT Directorate, please see https://datatr= acker.ietf.org/group/iotdir/about/ and for Directorates in general plea= se see https://www.iet= f.org/about/groups/directorates/.

 

I’ll be away for  the next 2 weeks and= could not finish the review in time for this heavy document, but at least = I made it through till the RPL section. In the interest of time, let me sha= re what I already have.

 

Summary

-------------

 

The summary of the review is that the document is= Ready for Publication, with comments.

 

 

Major comments

------------------------

 

-       = ;   “ in-band” and “out of band = network “

should be defined since it is fundamental to unde= rstand that the ACP takes place in the same physical links as the data plan= e, as opposed to dedicated management ports (correct?);

 

-       = ;   Section 3; the IOT certainly could use an ACP= . It would be useful to scope the feature that is proposed in this document= , whether it is compatible of not with constrained environments, whether it= needs adaptations, point on Michael’s enrollment draft. It would also be useful to indicate whether the ACP work= s between L3 bridges, IOW whether ACP operates the same (over IP) regardles= s of the packet forwarding layer in the data plane;

 

-       = ;  “ Inside the ACP VRF, each node sets up a loopback interface with it= s ULA IPv6 address”

This is the first time, IPv6 is discussed; would hav= e been nice to introduce that the Node has IPv6, that it needs a ULA and th= at ACP assigns it. This discussion could be done in conjunction with the co= mment above;

 

-       = ;  About  “The ttl

parameter SHOULD be 3.5 times the period so= that up to three

consecutive messages can be dropped before = considering an

-       = ;    announcement expired. “

This is the only discussion on the ttl field of t= he M_FLOOD. Though its meaning is quite obvious, the behavior associated to= it should be defined. 

 

-       = ;  “In the above (recommended) example the period of sending of the”

Is this RECOMMENDED IOW normative??

 

-       = ;  Text P 25 says “At this time in the lifecycle of ACP nodes, it is un= clear whether it

is feasible to even decide on a single MTI = (mandatory to implement)

security association protocol across all AC= P nodes”

but then P27 “= It MUST support ESP

with AES256 for encryption and SHA256 hash = and MUST NOT permit weaker

crypto options.”

and then “&nbs= p;  A baseline ACP node MUST support IPsec natively and MAY support IPsec<= /o:p>

via GRE. A constrained ACP node MUST suppor= t dTLS.  ACP nodes

connecting constrained areas with baseline = areas MUST therefore

support IPsec and dTLS.”<= /o:p>

Seems that text P25 should go?

 

 

-       = ;    “Use-ULA: For loopback interfaces of ACP nodes, we use U= nique Local

Addresses (ULA), specifically ULA-Random, a= s defined in [[RFC4193]

with L=3D1].”

This needs to be more crisp. ULA is defined in RF= C 4193 but the term ULA-Random is not. I think you mean that 3.2.2.  o= f RFC 4193 is the way addresses are formed, if so please say so.  The = best practice RFC 8064 recommends use of RFC 7217. I understand that privacy is not a concern but does it hurt? Anyway = please point at section 6.10 and 6.11.1.11

 

 

-       = ;    “

RPL Mode of Operations (MOP): mode 3 "= Storing Mode of Operations with multicast support".  Implementati= ons should support also other modes.

Note: Root indicates mode in DIO flow”= ;

Why “should” ? there is no much point= supporting the other modes is there? Section 6.11.1.13 says that SRH is no= t used so this is inconsistent. You only need MOP 2 or 3, 3 is you do multi= cast which at the moment does not appear to be the case. SO I would MUST a MOP of 2 and MAY a MOP of 3 which is a superse= t of MOP 2, and that’s it (see 6.3.1 of RFC 6550).

 

 

-       = ;    “The lack of a RPI (the header defined by [RFC6553]), me= ans that the

data-plane will have no rank value that can= be used to detect loops.

As a result, traffic may loop until the TTL= of the packet reaches

zero. ”

Since we have reliable links and no stretch (sect= ion 6.11.1.7), loops should be exceedingly rare. It could be recommended to= send the DIOs 2-3 times to inform children when losing the last parent. No= te that the technique in section “8.2.2.6.  Detaching” of RFC 6550 should be favored over that in section “= ;8.2.2.5.  Poisoning” because it allows local connectivity. Also= , It should be said that a node should select more than one parent, at leas= t 3 if possible, and send DAOs to all of then in parallel. This provides multi

        &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;  

 

-       = ;    “ACP nodes MUST perform standard IPv6 operations across = ACP virtual

interfaces including SLAAC (Stateless Addre= ss Auto-Configuration -

RFC4862])”

They may actually prefer Optimistic DAD RFC 4429 = since address duplication is highly improbable as long as you .<= /p>

 

 

Minor comments

------------------------

 

 

-       = ;  About “[RFC7575] defines the fundamental ...  “

for readability, it may be nicer to indicate the = title of an RFC when it is referenced first; e.g. the text above would beco= me

" Autonomic Networking: Definitions and Desi= gn Goals" [RFC7575] defines the fundamental ...  

 

-       = ;  about “or network plane (there is no well-established name  for= this)”

The term network plane is not used again in the d= ocument. This text may go away. You may consider using "security and transport substrate" instead, since it is used elsewhere in the document. Also, please be consistent on whether you use hyphen or not and use that g= lobally, e.g. for the above, and pane like in “forwarding plane” or “out of band netw= ork “;

 
-         "data-plen” 
Typo? 
 

-       = ;  “OAM applications ("Operations Administration and Management)"

Consider using “Operations Administration a= nd Management (OAM) applications “ instead; same goes for SDN, ASA, V= RF, etc…

 

-       = ;   “   MIC:  "Manufacturer Installed Certific= ate".  Another word not used in this document to describe an IDev= ID.”

MIC is not used in the document, maybe inform of = this equivalence in the IDevID definition instead; same goes for SUDI. Note= that UDI is use just once and may not need an entry here.

 

-       = ;        “RPL:  \"IPv6 Routing = Protocol for Low-Power and Lossy Networks\".  The routing protoco= l used in the ACP.”

Maybe point on [RFC6550]?

 

-       = ;  “Connecting over non-ACP Layer-3 clouds initially requires a tunnel = between ACP nodes.”

I understands that it is one tunnel between each = pair of adjacent ACP nodes, correct? I read “a tunnel” as an en= d-to-end tunnel, which sounds different

 

-       = ;   “ACP relies on group security”

Add “The”

 

-       = ;   “An ACP node MUST have keying

   material consisting of a certi= ficate (LDevID), with which it can

     cryptographically assert its membership in the ACP d= omain and trust

     anchor(s) associated with that certificate with whic= h it can verify

     the membership of other nodes (see Section 6.1.2).&#= 8221;

This is convoluted. Could you make it 2 sentences= ?

 

-       = ;  “  Note: LDevID ("Local Device IDentification") is th= e term used to

     indicate a certificate that was provisioned by the o= wner of a node as

opposed to IDevID ("Initial Device IDe= ntifier") that may has been

loaded on the node during manufacturing tim= e.  Those IDevID do not

include owner and deployment specific infor= mation to allows autonomic

establishment of trust for the operations o= f an ACP domain (e.g.:

between two ACP nodes without relying on an= y third party).”

LDevID was already defined in the terminology. Th= is text may move there or go away.

 

-       = ;   “   This document uses the term ACP in many places w= here its reference

document use the word autonomic.R= 21;

Add [RFC7575] after “reference documentR= 21;

 

 

-       = ;   “   "routing-subdomain" is the autonomic s= ubdomain that is used to

calculate the hash for the ULA prefix of th= e ACP address of the node.”

Do you mean ULA suffix?

 

-       = ;   “   o  If the node certificates indicate a CDP = (or OCSP) then the peer's

certificate must be valid according to thos= e criteria. e.g.: OCSP

check across the ACP or not listed in the C= RL retrieved from the

CDP.”

Please define CDP and OSCP, and/or reference a RF= C is possible. 

Helper: Online Certificate Status Protocol (OCSP)=   Certificate Revocation List (CRL) Distribution Point (CDP)

 

-       = ;   “enrolment”

Typo

 

-       = ;   “This can

use a single GRASP M_FLOOD message as shown= in above example.”

Actually the example is now below. Please referen= ce the figure.

 

-       = ;    “The protocol could for example could have been&#= 8221;

Typo

 

 

-       = ;    “if the IPsec connecting”

Typo?

 

-       = ;    “ACP wide service discovery”

ACP-wide 

 

-       = ;    “if the IPsec connecting In most other solution<= o:p>

designs such distributed discovery does not= exist at all or was added

as an afterthought and relied upon inconsis= tently”

Consider removing or rephrasing : )

 

-       = ;  Maybe consider moving the discussion on multicast P= 29 -30 to annex? Why Multicast is not used is an interesting discussion but= not critical for the protocol operation.

 

-       = ;    “it is not quite clear yet what exactly the implications= are

to make GRASP flooding depend on RPL DODAG = convergence and how

difficult it would be to let GRASP flooding= access the DODAG

information”

Let’s chat then. There’s work on reli= able multicast for RPL using BIER.

 

-       = ;  “In the terminology of GRASP ([I-D.ietf-anima-grasp]), the ACP is th= e

security and transport substrate for the GR= ASP instance run inside

the ACP ("ACP GRASP"). ”

“running” inside the ACP? Maybe rephr= ase more globally?

-       = ;   

 

 

-       = ;    “OAM protocols no not require IPv4: The ACP may carry OA= M ”

Typo no->do

 

 

-       = ;    “Consider a network that has multiple NOCs in different = locations.

Only one NOC will become the DODAG root.&nb= sp; Other NOCs will have to

send traffic through the DODAG (tree) roote= d in the primary NOC.”

A figure would help. I remember all the discussio= ns we had about setting the prf bits in remote NOCs

 

 

-       = ;    “RPPL.”

Typo

 

 

-       = ;    “Administrative Preference ([RFC6552], 3.2.6  ̶= 1;

The section is correct but that is RFC 6550.=

 

 

-       = ;    “This is a standard issue

with tunneling, not specific to running the= ACP across it.”

Do you really mean Standard or would Classical wo= rk better?

 

 

-       = ;    “Even though loopback interfaces where originally d”

Typo Where -> were

 

 

 

-       = ;  Section 3, 4, 9 and 10 may move to Annex (by moving= the section after the </references> tag) since they are not normativ= e and do not contribute to the understanding of the protocol. This way ther= e should not be a need to indicate normative in other sections.

 

-       = ;  Well Noted that Section 14 Will be removed/.

 

 

Sorry for being interrupted here,

 

Pascal

 

--_000_449b7e2f10094531b325919710696754XCHRCD001ciscocom_-- From nobody Mon Feb 26 13:17:36 2018 Return-Path: X-Original-To: int-dir@ietfa.amsl.com Delivered-To: int-dir@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3ADC3129C6C; Mon, 26 Feb 2018 13:17:34 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2 X-Spam-Level: X-Spam-Status: No, score=-2 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_DNSWL_NONE=-0.0001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 WxzgtefgSHyl; Mon, 26 Feb 2018 13:17:14 -0800 (PST) Received: from mail-pg0-x234.google.com (mail-pg0-x234.google.com [IPv6:2607:f8b0:400e:c05::234]) (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 202A212711E; Mon, 26 Feb 2018 13:17:06 -0800 (PST) Received: by mail-pg0-x234.google.com with SMTP id w17so6670904pgv.6; Mon, 26 Feb 2018 13:17:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=YdLq5XxcOEgM7PPKW3A1TfpJ8E5WCyqDkqRhaGsXeZo=; b=dKv2DFcmSfk8Y9sbVK4uP05jACVpnmwB5gJRg6lcGTWkPgW+fCqDsokCDtOiwljnky /g9XWU6Sn7F1gvQdBOl/m9BrpKFP61kEnG1Cl+Jg08E+svw8lHr1ks8F1Q9IuAhgURqf aFHrVyc6ifhCo/or/oVFgYS0NkpNC4RCIKF0t5jDJHqCRt9RNo8hDz1nO7S10bcvyuly GUrFxqPGqwe/oNxVRlnXYAuBuh0FePgtbO0csz2aLdDjn6Q/PEWbQXDc8xczLvhw/Cuq KVH6JPCwkEWToBeZKoIX7K/l2TAV1mVHSJGGnh2/uC5CCtwOZ/xMCmtru9WXaVW7pINu TyFw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:subject:to:cc:references:from:message-id :date:user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=YdLq5XxcOEgM7PPKW3A1TfpJ8E5WCyqDkqRhaGsXeZo=; b=kCJ6OpHU0gRdJfAWRqeNARhWf985u2hDzIT0FNlfj7M1y3i6pu1xe1bMQiUPGZQwDv MIt5zEv4fE47PEmXjHi9QDhB/ie75FK6KHqxs35yytS1TumYsk63xSoZUWZxQzOARvZR XxyjnpTFB9pINUsUTKOPQQJRiopRMryBnsX1shIci61RJB3JR6zs1g8WwFdMxwtsSWSy cljHo0obVVf/P5qn69fbuVyGM+ZcMI6VPc4/LImf0n1Lmh9qQ35ZtNp3BN97M7fJ6wjr 79vYDhbsGXuIHwdvFvs0nwxQXDTTcaYsKyrfvGiiMl07XgxVjHnVhy9ilBlknvDGlDMq cH1A== X-Gm-Message-State: APf1xPB3QLl1/voU0T+GHjK5iWGmkBGxNGL5Zv4jjp0nnfnu+og+iUeE 8QZSNnivCHFLmHa3qJAx8sPepuw/1KM= X-Google-Smtp-Source: AG47ELtbsC91WHyjvhl8Htb6q6nVR08nSWhszD33gzwsVFrHXW6H9EIkzC7yFQD57ZEfFm8sQPGy/Q== X-Received: by 10.98.178.17 with SMTP id x17mr2510001pfe.2.1519679825361; Mon, 26 Feb 2018 13:17:05 -0800 (PST) Received: from ?IPv6:2001:df0:0:2006:c0da:ac17:5f6d:8e76? ([2001:df0:0:2006:c0da:ac17:5f6d:8e76]) by smtp.gmail.com with ESMTPSA id x86sm20974282pfa.164.2018.02.26.13.17.02 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 26 Feb 2018 13:17:04 -0800 (PST) Sender: Brian Carpenter To: "Pascal Thubert (pthubert)" , iot-dir , "ops-dir@ietf.org" , "int-dir@ietf.org" Cc: "draft-ietf-anima-autonomic-control-plane@ietf.org" , "anima@ietf.org" References: <449b7e2f10094531b325919710696754@XCH-RCD-001.cisco.com> From: Brian E Carpenter Message-ID: Date: Tue, 27 Feb 2018 10:17:01 +1300 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: <449b7e2f10094531b325919710696754@XCH-RCD-001.cisco.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Archived-At: Subject: Re: [Int-dir] [Anima] An IOT DIR review of draft-ietf-anima-autonomic-control-plane X-BeenThere: int-dir@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "This list is for discussion between the members of the Internet Area directorate." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Feb 2018 21:17:34 -0000 Pascal, Great review! > - Section 3; the IOT certainly could use an ACP. It would be useful to scope the feature that is proposed in this document, whether it is compatible of not with constrained environments, whether it needs adaptations, point on Michael's enrollment draft. It would also be useful to indicate whether the ACP works between L3 bridges, IOW whether ACP operates the same (over IP) regardless of the packet forwarding layer in the data plane; Perhaps this point belongs in draft-ietf-anima-reference-model. ANIMA is chartered for "professionally managed" networks, and the reference model says: "At a later stage ANIMA may define a scope for constrained nodes with a reduced ANI [autonomic infrastructure] and well-defined minimal functionality. They are currently out of scope." So while your point is very valid, it's been considered out of scope so far. I'll leave the rest of your excellent comments to the ACP authors. Thanks Brian From nobody Tue Feb 27 10:09:57 2018 Return-Path: X-Original-To: int-dir@ietfa.amsl.com Delivered-To: int-dir@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AF427120726; Tue, 27 Feb 2018 10:09:40 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.959 X-Spam-Level: X-Spam-Status: No, score=-3.959 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_MED=-2.3, T_RP_MATCHES_RCVD=-0.01, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=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 mg3McDQBBvQi; Tue, 27 Feb 2018 10:09:38 -0800 (PST) Received: from faui40.informatik.uni-erlangen.de (faui40.informatik.uni-erlangen.de [131.188.34.40]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 877BA126CD6; Tue, 27 Feb 2018 10:09:36 -0800 (PST) Received: from faui40p.informatik.uni-erlangen.de (faui40p.informatik.uni-erlangen.de [131.188.34.77]) by faui40.informatik.uni-erlangen.de (Postfix) with ESMTP id DC55358C4BA; Tue, 27 Feb 2018 19:09:31 +0100 (CET) Received: by faui40p.informatik.uni-erlangen.de (Postfix, from userid 10463) id C2E0CB0DBAC; Tue, 27 Feb 2018 19:09:31 +0100 (CET) Date: Tue, 27 Feb 2018 19:09:31 +0100 From: Toerless Eckert To: Brian E Carpenter Cc: "Pascal Thubert (pthubert)" , iot-dir , "ops-dir@ietf.org" , "int-dir@ietf.org" , "draft-ietf-anima-autonomic-control-plane@ietf.org" , "anima@ietf.org" Message-ID: <20180227180931.GA11701@faui40p.informatik.uni-erlangen.de> References: <449b7e2f10094531b325919710696754@XCH-RCD-001.cisco.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Archived-At: Subject: Re: [Int-dir] [Anima] An IOT DIR review of draft-ietf-anima-autonomic-control-plane X-BeenThere: int-dir@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "This list is for discussion between the members of the Internet Area directorate." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Feb 2018 18:09:41 -0000 +1, thanks a lot, Pascal. Will only get back after Mar 5 to reply, some other deadline stuff upfront. I think the correct term in reality is '"professionally' "managed"' networks. But kidding aside: resource constrained networks are not necessarily so autonomic that they do not require 'professional' 'management', that is just lucky coincidence, so the missing discussion if any would have to be about constrained devices and the subset of ACP functionality feasible/useful. I thought i had already some text in the appendix. WIll check and improve next week. Cheers Toerless On Tue, Feb 27, 2018 at 10:17:01AM +1300, Brian E Carpenter wrote: > Pascal, > > Great review! > > > - Section 3; the IOT certainly could use an ACP. It would be useful to scope the feature that is proposed in this document, whether it is compatible of not with constrained environments, whether it needs adaptations, point on Michael's enrollment draft. It would also be useful to indicate whether the ACP works between L3 bridges, IOW whether ACP operates the same (over IP) regardless of the packet forwarding layer in the data plane; > > Perhaps this point belongs in draft-ietf-anima-reference-model. ANIMA is chartered for "professionally managed" networks, and the reference model says: "At a later stage ANIMA may define a scope for constrained nodes with a reduced ANI [autonomic infrastructure] and well-defined minimal functionality. They are currently out of scope." So while your point is very valid, it's been considered out of scope so far. > > I'll leave the rest of your excellent comments to the ACP authors. > > Thanks > Brian > > _______________________________________________ > Anima mailing list > Anima@ietf.org > https://www.ietf.org/mailman/listinfo/anima -- --- tte@cs.fau.de