From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 1 07:38:53 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id HAA22817 for ; Wed, 1 Dec 2004 07:38:53 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <3.00EF76B1@cherry.ease.lsoft.com>; Wed, 1 Dec 2004 7:37:48 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47493839 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 1 Dec 2004 07:37:41 -0500 Received: from 208.17.33.59 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 1 Dec 2004 07:37:41 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2657.72) Content-Type: text/plain Message-ID: <6FEB46B4943AA348B0776325DA8EC37F027B3C87@entcoexch01.broadband.att.com> Date: Wed, 1 Dec 2004 05:37:15 -0700 Reply-To: Mailing List Sender: Mailing List From: "Field, Brian" Subject: Re: router LSA with unknown link type To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list A couple of comments: * Is it clear from 2328 that when a router receives a router LSA with an unknown link type that the router should not drop the LSA but should instead store the intact LSA in its LSDB and continue to flood the intact LSA? * In the SPF algorithm, I wonder if it might make sense to tighten up the language some, specifically around (2b) in 16.1 (and maybe in other locations): (b) Otherwise, W is a transit vertex (router or transit network). Look up the vertex W's LSA (router-LSA or network-LSA) in Area A's link state database. If the LSA does not exist, or its LS age is equal to MaxAge, or it does not have a link back to vertex V, examine the next link in V's LSA.[23] In the context of possible new link types, the text "... it does not have a link back to vertex V" may be too vague. Maybe we should specify the specific link types that this link must have in order for this check to succeed? * In section 4 of the proposed draft, I have two issues with the following: Any future extensions SHOULD not cause any change in routing table calculations. Such a change can result in routing loops because the routers unaware of the extension will ignore the link. I'm not convinced that we should close the door on defining new link types which define non-edge topo and which are carried in the router LSA. Further, I'm not convinced that introducing these new link types will necessarily cause routing loops. Consider some set of routers which forward all router LSAs intact (per this ID). Some routers support just link types 1-4 and others support 1-4 and a new link type (which defines topo info). All routers have the same LSDB which contains link types 1-4 and new ones. The old routers compute trees based on types 1-4. The new routers compute trees based on links 1-4 and the new links. Instead of causing forwarding loops, doesn't this just cause some routers (the ones that understand the new link types) to have short cuts in their topos? Now I could see forwarding loops being developed if routers, upon seeing a router LSA with an unknown link type, dropped the router LSA and did not store it in its LSDB or flood it. But per 2328 or this spec, that's not proper behavior. Thanks Brian ________________________________ From: Vishwas Manral [mailto:Vishwas@SINETT.COM] Sent: Tuesday, November 30, 2004 9:57 AM To: OSPF@PEACH.EASE.LSOFT.COM Subject: Re: router LSA with unknown link type Hi Mitchell, Good to hear from you and thanks for the comments. The basic idea is that the flooding happens normally, as is(we do not check if we understand a link type before flooding forward). This allows new link-types. The change done is to explicitly state that while doing the routing table calculations the link needs to be ignored. Maybe I will change the text to further clarify this. Thanks, Vishwas ________________________________ From: Mailing List on behalf of Erblichs Sent: Tue 11/30/2004 8:43 AM To: OSPF@PEACH.EASE.LSOFT.COM Subject: Re: router LSA with unknown link type Vishwas & Acee, Are we viewing a area that has a mix of routers that understand some link-types beyond 4 and some routers that don't understand them???? In the perfect world shouldn't all the routers within a area treat anything beyond 4 the same way? If this is the case, some option must be created that is communicated that identifies the area's link-types attributes. However... that seemed to be mentioned and dropped.. I aggree the non-stated default should be "ignore". 1) However, should the adj be dropped upon receipt of recv a unknown LSA? This would remove inconsistencies within a area vs allowing the issue to exist in later implimentations. 2) "silently ignored" ; Else should a log entry be present that a LSDB inconsistency exists within the LSDB? To prevent a circular buffer from potentially filling with this msg type, only every so X entries be logged. So, I question what is ment by "silently ignored" and why? IMO, "silently ignore" is probably not appropriate due to the reasons for not knowing why routing Loops can/are existing in the selected routes. 3) should it be mentioned that a DR/BDR be always fully aware of a super-set of link-types, and thus accept them? If not then only the subset will be communicated to "others". Mitchell Erblich ----------------- Vishwas Manral wrote: > > Hi Acee, > > I am attaching the document where I have added, exactly what you have > stated. > > Thanks, > Vishwas > > -----Original Message----- > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On Behalf Of Acee > Lindem > Sent: Tuesday, November 30, 2004 6:30 PM > To: OSPF@PEACH.EASE.LSOFT.COM > Subject: Re: router LSA with unknown link type > > Vishwas Manral wrote: > > > Hi Acee, > > > > Here goes the link: - > > > http://www.ietf.org/internet-drafts/draft-manral-ospf-router-lsa-unknown > -type-00.txt > > > > Do let me know your views? > > Hi Vishwas, > > I feel we should move forward with support for the "silently ignore" > option. I think > that you should add a section with a caveat that states that the > addition of new link types > will still have compatibility implications since there is the potential > for routing loops if > some routers in the area support the new types and others ignore them. > However, > the situation is better than what we have today. > > Thanks, > Acee > > > > > Thanks, > > Vishwas > > > > > ------------------------------------------------------------------------ > > *From:* Mailing List on behalf of Vishwas Manral > > *Sent:* Thu 11/25/2004 9:48 PM > > *To:* OSPF@PEACH.EASE.LSOFT.COM > > *Subject:* Re: router LSA with unknown link type > > > > Hi Acee, > > > > I think we must not forget there can be malicious violations of the > > protocol too, as Tony rightly specified we need to specify the > behavior > > when unexpected or corrupt data is received. > > > > As you stated, I intend to post a short draft on this soon. > > > > Thanks, > > Vishwas > > -----Original Message----- > > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On Behalf Of > Acee > > Lindem > > Sent: Thursday, November 25, 2004 10:44 PM > > To: OSPF@PEACH.EASE.LSOFT.COM > > Subject: Re: router LSA with unknown link type > > > > All, > > While it would have been better if RFC 2328 did precisely specify what > > to do with unknown link types the fact of the matter is that it > doesn't. > > IMHO, > > we'd need a short draft in order to formally specify this (or > concensus > > and inclusion > > in the RFC 2740 respin). At this point, the implementation(s) that > > generate(s) > > the unknown link types is/are the ones in violation of the protocol. > > > > Speaking as a WG member, I really don't like the idea of extending the > > protocol > > using unknown link types UNLESS the new types are in fact a different > > type of > > intra-area topological edge in the SPF graph. Once we open it up I can > > envision people > > trying to cram all sorts of non-link data in the router LSA. If we > want > > to extend the > > protocol past what it does today there are cleaner ways of doing it > > (e.g., new LSA types > > supporting TLVs). > > > > Thanks, > > Acee > > > > > > Nitin Kakkar wrote: > > > > >IMHO I can think of two possibilities for this condition > > > > > >1) Some error in LSA creation, which overwrite link type field. : > This > > >should be reflected in checksum error and should be handled such. > > > > > >2) Some new invension which adds to the existing 4 types of Link > Types > > (or > > >support for unknown link types): This Needs to have some common > > >understanding (RFC etc) to handle this. I feel that they can be > handled > > like > > >unknwon LSA's (store & forward only, no routing calc's) > > > > > >HTH > > >Nitin > > > > > >-----Original Message----- > > >From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM]On Behalf Of > Acee > > >Lindem > > >Sent: 2004Ae11OA24EO 21:37 > > >To: OSPF@PEACH.EASE.LSOFT.COM > > >Subject: Re: router LSA with unknown link type > > > > > > > > >Field, Brian wrote: > > > > > > > > > > > >>If a router receives a router LSA that contains several links and > > >>for one of the links, the link type field is not known, should the > > >>router ignore the entire router LSA or just skip this one link? > > >> > > >> > > >> > > >> > > >Hi Brian, > > >Unfortunately, the handling of unknown link types is not specifically > > >defined in RFC 2328. > > >Since links types 1-4 are the only ones defined an implementation > > should > > >probably log > > >the invalid link type (with rate limiting). Whether it ignores the > LSA > > >or just the unknown link is > > >implementation specific. If we were to move forward with link type > > >extension it would not be > > >backward compatible (at least not without knobs or other mechanisms). > > > > > >Thanks, > > >Acee > > > > > > > > > > > >>Thanks > > >>Brian > > >> > > >> > > >> > > > > ------------------------------------------------------------------------ > Name: draft-manral-ospf-router-lsa-unknown-type-01.txt > draft-manral-ospf-router-lsa-unknown-type-01.txt Type: Plain Text (text/plain) > Encoding: base64 > Description: draft-manral-ospf-router-lsa-unknown-type-01.txt From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 1 10:16:58 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id KAA09189 for ; Wed, 1 Dec 2004 10:16:57 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <21.00EF7980@cherry.ease.lsoft.com>; Wed, 1 Dec 2004 10:16:52 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47509722 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 1 Dec 2004 10:16:50 -0500 Received: from 64.102.122.149 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 1 Dec 2004 10:16:49 -0400 Received: from rtp-core-1.cisco.com (64.102.124.12) by rtp-iport-2.cisco.com with ESMTP; 01 Dec 2004 10:16:50 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-1.cisco.com (8.12.10/8.12.6) with ESMTP id iB1FGlgl022076 for ; Wed, 1 Dec 2004 10:16:47 -0500 (EST) Received: from [64.102.48.185] (dhcp-64-102-48-185.cisco.com [64.102.48.185]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BDS02052; Wed, 1 Dec 2004 07:16:46 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <6FEB46B4943AA348B0776325DA8EC37F027B3C87@entcoexch01.broadband.att.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41ADE05E.5030504@cisco.com> Date: Wed, 1 Dec 2004 10:16:46 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: router LSA with unknown link type To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <6FEB46B4943AA348B0776325DA8EC37F027B3C87@entcoexch01.broadband.att.com> Precedence: list Content-Transfer-Encoding: 7bit Field, Brian wrote: >A couple of comments: > >* Is it clear from 2328 that when a router receives a router LSA with an >unknown link type that the router should not drop the LSA but should instead >store the intact LSA in its LSDB and continue to flood the intact LSA? > > It isn't really clear and hence the need for the Vishwas' draft. >* In the SPF algorithm, I wonder if it might make sense to tighten up the >language some, specifically around (2b) in 16.1 (and maybe in other >locations): > > (b) Otherwise, W is a transit vertex (router or transit > network). Look up the vertex W's LSA (router-LSA or > network-LSA) in Area A's link state database. If the > LSA does not exist, or its LS age is equal to MaxAge, or > it does not have a link back to vertex V, examine the > next link in V's LSA.[23] > >In the context of possible new link types, the text "... it does not have a >link back to vertex V" may be too vague. Maybe we should specify the >specific link types that this link must have in order for this check to succeed? > >* In section 4 of the proposed draft, I have two issues with the following: > > Any future extensions SHOULD not cause any change in routing table > calculations. Such a change can result in routing loops because the routers > unaware of the extension will ignore the link. > >I'm not convinced that we should close the door on defining new link types >which define non-edge topo and which are carried in the router LSA. > I agree - what the draft should say is that the introduction of new link types should address backward compatibility issues within the area. >Further, I'm >not convinced that introducing these new link types will necessarily cause >routing loops. > > It depends on the topology. However, if some routers are using the new links and others are ignoring them there is the potential for loops. >Consider some set of routers which forward all router LSAs intact (per this >ID).Some routers support just link types 1-4 and others support 1-4 and a new >link type (which defines topo info). All routers have the same LSDB which contains >link types 1-4 and new ones. The old routers compute trees based on types 1-4. >The new routers compute trees based on links 1-4 and the new links. Instead of >causing forwarding loops, doesn't this just cause some routers (the ones >that understand the new link types) to have short cuts in their topos? > > No - if you have router that doesn't understand the new types in the path to the router with the shortcut you could have a loop. >Now I could see forwarding loops being developed if routers, upon seeing a >router LSA with an unknown link type, dropped the router LSA and did not >storeit in its LSDB or flood it. But per 2328 or this spec, that's not proper >behavior. > >Thanks >Brian > > > > >________________________________ > > From: Vishwas Manral [mailto:Vishwas@SINETT.COM] > Sent: Tuesday, November 30, 2004 9:57 AM > To: OSPF@PEACH.EASE.LSOFT.COM > Subject: Re: router LSA with unknown link type > > > Hi Mitchell, > > Good to hear from you and thanks for the comments. The basic idea is >that the flooding happens normally, as is(we do not check if we understand a >link type before flooding forward). This allows new link-types. > > The change done is to explicitly state that while doing the routing >table calculations the link needs to be ignored. Maybe I will change the >text to further clarify this. > > Thanks, > Vishwas > >________________________________ > > From: Mailing List on behalf of Erblichs > Sent: Tue 11/30/2004 8:43 AM > To: OSPF@PEACH.EASE.LSOFT.COM > Subject: Re: router LSA with unknown link type > > > > Vishwas & Acee, > > Are we viewing a area that has a mix of routers > that understand some link-types beyond 4 and some > routers that don't understand them???? > > In the perfect world shouldn't all the routers > within a area treat anything beyond 4 the same way? > > If this is the case, some option must be created > that is communicated that identifies the area's > link-types attributes. However... that seemed to > be mentioned and dropped.. > > I aggree the non-stated default should be "ignore". > 1) However, should the adj be dropped upon receipt of > recv a unknown LSA? This would remove inconsistencies > within a area vs allowing the issue to exist in later > implimentations. > > 2) "silently ignored" ; Else should a log entry be present > that a LSDB inconsistency exists within the LSDB? To > prevent a circular buffer from potentially filling with > this msg type, only every so X entries be logged. So, I > question what is ment by "silently ignored" and why? IMO, > "silently ignore" is probably not appropriate due to the > reasons for not knowing why routing Loops can/are existing > in the selected routes. > > 3) should it be mentioned that a DR/BDR be always fully > aware of a super-set of link-types, and thus accept > them? If not then only the subset will be communicated > to "others". > > Mitchell Erblich > ----------------- > > > Vishwas Manral wrote: > > > > Hi Acee, > > > > I am attaching the document where I have added, exactly what you >have > > stated. > > > > Thanks, > > Vishwas > > > > -----Original Message----- > > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On Behalf Of >Acee > > Lindem > > Sent: Tuesday, November 30, 2004 6:30 PM > > To: OSPF@PEACH.EASE.LSOFT.COM > > Subject: Re: router LSA with unknown link type > > > > Vishwas Manral wrote: > > > > > Hi Acee, > > > > > > Here goes the link: - > > > > > >http://www.ietf.org/internet-drafts/draft-manral-ospf-router-lsa-unknown > > -type-00.txt > > > > > > Do let me know your views? > > > > Hi Vishwas, > > > > I feel we should move forward with support for the "silently >ignore" > > option. I think > > that you should add a section with a caveat that states that the > > addition of new link types > > will still have compatibility implications since there is the >potential > > for routing loops if > > some routers in the area support the new types and others ignore >them. > > However, > > the situation is better than what we have today. > > > > Thanks, > > Acee > > > > > > > > Thanks, > > > Vishwas > > > > > > > > >------------------------------------------------------------------------ > > > *From:* Mailing List on behalf of Vishwas Manral > > > *Sent:* Thu 11/25/2004 9:48 PM > > > *To:* OSPF@PEACH.EASE.LSOFT.COM > > > *Subject:* Re: router LSA with unknown link type > > > > > > Hi Acee, > > > > > > I think we must not forget there can be malicious violations of >the > > > protocol too, as Tony rightly specified we need to specify the > > behavior > > > when unexpected or corrupt data is received. > > > > > > As you stated, I intend to post a short draft on this soon. > > > > > > Thanks, > > > Vishwas > > > -----Original Message----- > > > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On Behalf >Of > > Acee > > > Lindem > > > Sent: Thursday, November 25, 2004 10:44 PM > > > To: OSPF@PEACH.EASE.LSOFT.COM > > > Subject: Re: router LSA with unknown link type > > > > > > All, > > > While it would have been better if RFC 2328 did precisely >specify what > > > to do with unknown link types the fact of the matter is that it > > doesn't. > > > IMHO, > > > we'd need a short draft in order to formally specify this (or > > concensus > > > and inclusion > > > in the RFC 2740 respin). At this point, the implementation(s) >that > > > generate(s) > > > the unknown link types is/are the ones in violation of the >protocol. > > > > > > Speaking as a WG member, I really don't like the idea of >extending the > > > protocol > > > using unknown link types UNLESS the new types are in fact a >different > > > type of > > > intra-area topological edge in the SPF graph. Once we open it up >I can > > > envision people > > > trying to cram all sorts of non-link data in the router LSA. If >we > > want > > > to extend the > > > protocol past what it does today there are cleaner ways of doing >it > > > (e.g., new LSA types > > > supporting TLVs). > > > > > > Thanks, > > > Acee > > > > > > > > > Nitin Kakkar wrote: > > > > > > >IMHO I can think of two possibilities for this condition > > > > > > > >1) Some error in LSA creation, which overwrite link type field. >: > > This > > > >should be reflected in checksum error and should be handled >such. > > > > > > > >2) Some new invension which adds to the existing 4 types of >Link > > Types > > > (or > > > >support for unknown link types): This Needs to have some common > > > >understanding (RFC etc) to handle this. I feel that they can be > > handled > > > like > > > >unknwon LSA's (store & forward only, no routing calc's) > > > > > > > >HTH > > > >Nitin > > > > > > > >-----Original Message----- > > > >From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM]On Behalf >Of > > Acee > > > >Lindem > > > >Sent: 2004Ae11OA24EO 21:37 > > > >To: OSPF@PEACH.EASE.LSOFT.COM > > > >Subject: Re: router LSA with unknown link type > > > > > > > > > > > >Field, Brian wrote: > > > > > > > > > > > > > > > >>If a router receives a router LSA that contains several links >and > > > >>for one of the links, the link type field is not known, should >the > > > >>router ignore the entire router LSA or just skip this one >link? > > > >> > > > >> > > > >> > > > >> > > > >Hi Brian, > > > >Unfortunately, the handling of unknown link types is not >specifically > > > >defined in RFC 2328. > > > >Since links types 1-4 are the only ones defined an >implementation > > > should > > > >probably log > > > >the invalid link type (with rate limiting). Whether it ignores >the > > LSA > > > >or just the unknown link is > > > >implementation specific. If we were to move forward with link >type > > > >extension it would not be > > > >backward compatible (at least not without knobs or other >mechanisms). > > > > > > > >Thanks, > > > >Acee > > > > > > > > > > > > > > > >>Thanks > > > >>Brian > > > >> > > > >> > > > >> > > > > > > > >------------------------------------------------------------------------ > > Name: >draft-manral-ospf-router-lsa-unknown-type-01.txt > > draft-manral-ospf-router-lsa-unknown-type-01.txt Type: >Plain Text (text/plain) > > Encoding: >base64 > > Description: >draft-manral-ospf-router-lsa-unknown-type-01.txt > > > > From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 1 10:52:34 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id KAA15314 for ; Wed, 1 Dec 2004 10:52:30 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <10.00EF7B1D@cherry.ease.lsoft.com>; Wed, 1 Dec 2004 10:52:26 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47512494 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 1 Dec 2004 10:52:24 -0500 Received: from 208.17.33.54 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 1 Dec 2004 10:51:19 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2657.72) Content-Type: text/plain Message-ID: <6FEB46B4943AA348B0776325DA8EC37F027B3CA9@entcoexch01.broadband.att.com> Date: Wed, 1 Dec 2004 08:50:49 -0700 Reply-To: Mailing List Sender: Mailing List From: "Field, Brian" Subject: Re: router LSA with unknown link type To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Ok, so in the draft, in section 2, it states: -- Section 12.4.1 [OSPFv2] describes the various values used to Link-types in Router LSA's. The values 1, 2, 3 and 4 are defined. If a Router LSA with an unknown link-type is being processed, the link is ignored and the rest of the router LSA is processed normally. Section 16.1 (2)(a) [OSPFv2] should now read If this is a link to a stub network, examine the next link in V's LSA. Links to stub networks will be considered in the second stage of the shortest path calculation. If the link type is unknown examine the next link in V's LSA. Unknown Link Types are ignored. -- Is the processing mentioned in the second paragraph above meant to specify that router LSAs with unknown link types should be stored intact into the LSDB and flooded intact? When I read this, I thought this was applying to the updated text listed in the third paragraph. The storage and flooding implications of the above test isn't clear to me, but if this is clear to the developers, then I don't have an issue with it. Maybe this is obvious to others but it's not to me. Maybe my assumption base is incorrect. I'm thinking that "old" routers originate router LSAs with just types 1-4 and "new" routers originate router LSAs with types 1-4 and possibly new link types. Based on this spec, "old" and "new" routers share the same LSDB for types 1-4 as router LSAs are no longer ignored when an unknown link type is present. The LSDB across routers isn't "inconsistent" but some routers have some additional topo info. Given this, could someone provide an example where a forwarding loop is created? Thanks Brian > -----Original Message----- > From: Acee Lindem [mailto:acee@CISCO.COM] > Sent: Wednesday, December 01, 2004 8:17 AM > To: OSPF@PEACH.EASE.LSOFT.COM > Subject: Re: router LSA with unknown link type > > Field, Brian wrote: > > >A couple of comments: > > > >* Is it clear from 2328 that when a router receives a router > LSA with > >an unknown link type that the router should not drop the LSA > but should > >instead store the intact LSA in its LSDB and continue to > flood the intact LSA? > > > > > It isn't really clear and hence the need for the Vishwas' draft. > > >* In the SPF algorithm, I wonder if it might make sense to > tighten up > >the language some, specifically around (2b) in 16.1 (and > maybe in other > >locations): > > > > (b) Otherwise, W is a transit vertex (router or transit > > network). Look up the vertex W's LSA (router-LSA or > > network-LSA) in Area A's link state database. If the > > LSA does not exist, or its LS age is equal > to MaxAge, or > > it does not have a link back to vertex V, examine the > > next link in V's LSA.[23] > > > >In the context of possible new link types, the text "... it does not > >have a link back to vertex V" may be too vague. Maybe we should > >specify the specific link types that this link must have in > order for this check to succeed? > > > >* In section 4 of the proposed draft, I have two issues with > the following: > > > > Any future extensions SHOULD not cause any change in routing table > > calculations. Such a change can result in routing loops > because the routers > > unaware of the extension will ignore the link. > > > >I'm not convinced that we should close the door on defining new link > >types which define non-edge topo and which are carried in > the router LSA. > > > I agree - what the draft should say is that the introduction > of new link types should address backward compatibility > issues within the area. > > >Further, I'm > >not convinced that introducing these new link types will necessarily > >cause routing loops. > > > > > It depends on the topology. However, if some routers are > using the new links and others are ignoring them there is the > potential for loops. > > > >Consider some set of routers which forward all router LSAs > intact (per > >this ID).Some routers support just link types 1-4 and others > support 1-4 and a new > >link type (which defines topo info). All routers have the > same LSDB which contains > >link types 1-4 and new ones. The old routers compute trees > based on types 1-4. > >The new routers compute trees based on links 1-4 and the new links. > >Instead of causing forwarding loops, doesn't this just cause some > >routers (the ones that understand the new link types) to > have short cuts in their topos? > > > > > No - if you have router that doesn't understand the new types > in the path to the router with the shortcut you could have a loop. > > > >Now I could see forwarding loops being developed if routers, upon > >seeing a router LSA with an unknown link type, dropped the > router LSA > >and did not storeit in its LSDB or flood it. But per 2328 or this > >spec, that's not proper behavior. > > > >Thanks > >Brian > > > > > > > > > >________________________________ > > > > From: Vishwas Manral [mailto:Vishwas@SINETT.COM] > > Sent: Tuesday, November 30, 2004 9:57 AM > > To: OSPF@PEACH.EASE.LSOFT.COM > > Subject: Re: router LSA with unknown link type > > > > > > Hi Mitchell, > > > > Good to hear from you and thanks for the comments. The basic > >idea is that the flooding happens normally, as is(we do not > check if we > >understand a link type before flooding forward). This allows > new link-types. > > > > The change done is to explicitly state that while doing the > >routing table calculations the link needs to be ignored. > Maybe I will > >change the text to further clarify this. > > > > Thanks, > > Vishwas > > > >________________________________ > > > > From: Mailing List on behalf of Erblichs > > Sent: Tue 11/30/2004 8:43 AM > > To: OSPF@PEACH.EASE.LSOFT.COM > > Subject: Re: router LSA with unknown link type > > > > > > > > Vishwas & Acee, > > > > Are we viewing a area that has a mix of routers > > that understand some link-types beyond 4 and some > > routers that don't understand them???? > > > > In the perfect world shouldn't all the routers > > within a area treat anything beyond 4 the same way? > > > > If this is the case, some option must be created > > that is communicated that identifies the area's > > link-types attributes. However... that seemed to > > be mentioned and dropped.. > > > > I aggree the non-stated default should be "ignore". > > 1) However, should the adj be dropped upon receipt of > > recv a unknown LSA? This would remove inconsistencies > > within a area vs allowing the issue to exist in later > > implimentations. > > > > 2) "silently ignored" ; Else should a log > entry be present > > that a LSDB inconsistency exists within the LSDB? To > > prevent a circular buffer from potentially > filling with > > this msg type, only every so X entries be > logged. So, I > > question what is ment by "silently ignored" > and why? IMO, > > "silently ignore" is probably not > appropriate due to the > > reasons for not knowing why routing Loops > can/are existing > > in the selected routes. > > > > 3) should it be mentioned that a DR/BDR be > always fully > > aware of a super-set of link-types, and thus accept > > them? If not then only the subset will be > communicated > > to "others". > > > > Mitchell Erblich > > ----------------- > > > > > > Vishwas Manral wrote: > > > > > > Hi Acee, > > > > > > I am attaching the document where I have added, > exactly what > >you have > > > stated. > > > > > > Thanks, > > > Vishwas > > > > > > -----Original Message----- > > > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On > >Behalf Of Acee > > > Lindem > > > Sent: Tuesday, November 30, 2004 6:30 PM > > > To: OSPF@PEACH.EASE.LSOFT.COM > > > Subject: Re: router LSA with unknown link type > > > > > > Vishwas Manral wrote: > > > > > > > Hi Acee, > > > > > > > > Here goes the link: - > > > > > > > > >http://www.ietf.org/internet-drafts/draft-manral-ospf-router- > lsa-unknown > > > -type-00.txt > > > > > > > > Do let me know your views? > > > > > > Hi Vishwas, > > > > > > I feel we should move forward with support for the > "silently > >ignore" > > > option. I think > > > that you should add a section with a caveat that > states that the > > > addition of new link types > > > will still have compatibility implications since > there is the > >potential > > > for routing loops if > > > some routers in the area support the new types and others > >ignore them. > > > However, > > > the situation is better than what we have today. > > > > > > Thanks, > > > Acee > > > > > > > > > > > Thanks, > > > > Vishwas > > > > > > > > > > > > >------------------------------------------------------------- > ----------- > > > > *From:* Mailing List on behalf of Vishwas Manral > > > > *Sent:* Thu 11/25/2004 9:48 PM > > > > *To:* OSPF@PEACH.EASE.LSOFT.COM > > > > *Subject:* Re: router LSA with unknown link type > > > > > > > > Hi Acee, > > > > > > > > I think we must not forget there can be malicious > >violations of the > > > > protocol too, as Tony rightly specified we need > to specify the > > > behavior > > > > when unexpected or corrupt data is received. > > > > > > > > As you stated, I intend to post a short draft on > this soon. > > > > > > > > Thanks, > > > > Vishwas > > > > -----Original Message----- > > > > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On > >Behalf Of > > > Acee > > > > Lindem > > > > Sent: Thursday, November 25, 2004 10:44 PM > > > > To: OSPF@PEACH.EASE.LSOFT.COM > > > > Subject: Re: router LSA with unknown link type > > > > > > > > All, > > > > While it would have been better if RFC 2328 did > precisely > >specify what > > > > to do with unknown link types the fact of the > matter is that it > > > doesn't. > > > > IMHO, > > > > we'd need a short draft in order to formally > specify this (or > > > concensus > > > > and inclusion > > > > in the RFC 2740 respin). At this point, the > >implementation(s) that > > > > generate(s) > > > > the unknown link types is/are the ones in > violation of the > >protocol. > > > > > > > > Speaking as a WG member, I really don't like the idea of > >extending the > > > > protocol > > > > using unknown link types UNLESS the new types > are in fact a > >different > > > > type of > > > > intra-area topological edge in the SPF graph. > Once we open > >it up I can > > > > envision people > > > > trying to cram all sorts of non-link data in the router > >LSA. If we > > > want > > > > to extend the > > > > protocol past what it does today there are > cleaner ways of > >doing it > > > > (e.g., new LSA types > > > > supporting TLVs). > > > > > > > > Thanks, > > > > Acee > > > > > > > > > > > > Nitin Kakkar wrote: > > > > > > > > >IMHO I can think of two possibilities for this condition > > > > > > > > > >1) Some error in LSA creation, which overwrite > link type field. > >: > > > This > > > > >should be reflected in checksum error and should be > >handled such. > > > > > > > > > >2) Some new invension which adds to the > existing 4 types > >of Link > > > Types > > > > (or > > > > >support for unknown link types): This Needs to > have some common > > > > >understanding (RFC etc) to handle this. I feel > that they can be > > > handled > > > > like > > > > >unknwon LSA's (store & forward only, no routing calc's) > > > > > > > > > >HTH > > > > >Nitin > > > > > > > > > >-----Original Message----- > > > > >From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM]On > >Behalf Of > > > Acee > > > > >Lindem > > > > >Sent: 2004Ae11OA24EO 21:37 > > > > >To: OSPF@PEACH.EASE.LSOFT.COM > > > > >Subject: Re: router LSA with unknown link type > > > > > > > > > > > > > > >Field, Brian wrote: > > > > > > > > > > > > > > > > > > > >>If a router receives a router LSA that > contains several > >links and > > > > >>for one of the links, the link type field is > not known, > >should the > > > > >>router ignore the entire router LSA or just > skip this one > >link? > > > > >> > > > > >> > > > > >> > > > > >> > > > > >Hi Brian, > > > > >Unfortunately, the handling of unknown link > types is not > >specifically > > > > >defined in RFC 2328. > > > > >Since links types 1-4 are the only ones defined an > >implementation > > > > should > > > > >probably log > > > > >the invalid link type (with rate limiting). Whether it > >ignores the > > > LSA > > > > >or just the unknown link is > > > > >implementation specific. If we were to move > forward with > >link type > > > > >extension it would not be > > > > >backward compatible (at least not without knobs > or other > >mechanisms). > > > > > > > > > >Thanks, > > > > >Acee > > > > > > > > > > > > > > > > > > > >>Thanks > > > > >>Brian > > > > >> > > > > >> > > > > >> > > > > > > > > > > > >------------------------------------------------------------- > ----------- > > > > Name: > >draft-manral-ospf-router-lsa-unknown-type-01.txt > > > > draft-manral-ospf-router-lsa-unknown-type-01.txt Type: > >Plain Text (text/plain) > > > > Encoding: > >base64 > > > > Description: > >draft-manral-ospf-router-lsa-unknown-type-01.txt > > > > > > > > > From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 1 11:19:12 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id LAA19461 for ; Wed, 1 Dec 2004 11:19:12 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <23.00EF7ACE@cherry.ease.lsoft.com>; Wed, 1 Dec 2004 11:19:03 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47515075 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 1 Dec 2004 11:18:45 -0500 Received: from 158.130.12.194 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 1 Dec 2004 11:18:45 -0400 Received: from ee.upenn.edu (mx.ipsumnetworks.com [209.218.185.34]) (authenticated bits=0) by lion.seas.upenn.edu (8.12.10/8.12.10) with ESMTP id iB1GIj6C001046 (version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=NOT); Wed, 1 Dec 2004 11:18:45 -0500 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5) Gecko/20031013 Thunderbird/0.3 X-Accept-Language: en-us, en MIME-Version: 1.0 References: <6FEB46B4943AA348B0776325DA8EC37F027B3CA9@entcoexch01.broadband.att.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41ADEEDE.5050601@ee.upenn.edu> Date: Wed, 1 Dec 2004 11:18:38 -0500 Reply-To: Mailing List Sender: Mailing List From: Roch Guerin Organization: University of Pennsylvania Subject: Re: router LSA with unknown link type To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <6FEB46B4943AA348B0776325DA8EC37F027B3CA9@entcoexch01.broadband.att.com> Precedence: list Content-Transfer-Encoding: 7bit Brian, I guess a simple example seems to be as illustrated below: |A|------|B|------|D| | | |E|------|F|------|G|----R Router B is an "old" router, and all the other are "new" routers. Router D has a link of new type to router G that is connected to route R. The (bidirectional) costs on all links are 1 except for the link A-E that has a cost of 10. From router A's perspective, the shortest path to R is through router B, but because router B does not "see" the link of new type between routers D and G, its shortest path to R is through router A. Hence a routing loop. Roch >Maybe this is obvious to others but it's not to me. Maybe my assumption >base >is incorrect. I'm thinking that "old" routers originate router LSAs with >just >types 1-4 and "new" routers originate router LSAs with types 1-4 and >possibly new >link types. Based on this spec, "old" and "new" routers share the same >LSDB for >types 1-4 as router LSAs are no longer ignored when an unknown link type is >present. >The LSDB across routers isn't "inconsistent" but some routers have some >additional >topo info. Given this, could someone provide an example where a forwarding >loop is >created? > From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 1 12:11:15 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id MAA27564 for ; Wed, 1 Dec 2004 12:11:07 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <18.00EF7A02@cherry.ease.lsoft.com>; Wed, 1 Dec 2004 12:11:07 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47519804 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 1 Dec 2004 12:11:03 -0500 Received: from 63.197.255.158 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 1 Dec 2004 12:11:02 -0400 X-MimeOLE: Produced By Microsoft Exchange V6.5.6944.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C4D7C9.D3E43244" Thread-Topic: router LSA with unknown link type thread-index: AcTXueNRrbapNXJMTfebJorGYsbfTwADXZCW Message-ID: Date: Wed, 1 Dec 2004 09:18:51 -0800 Reply-To: Mailing List Sender: Mailing List From: Vishwas Manral Subject: Re: router LSA with unknown link type To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list This is a multi-part message in MIME format. ------_=_NextPart_001_01C4D7C9.D3E43244 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi folks, =20 >>I'm not convinced that we should close the door on defining new link = types >>which define non-edge topo and which are carried in the router LSA. > I agree - what the draft should say is that the introduction of new = link > types should address backward compatibility issues within the area. =20 Would the following text be ok? Any future extensions MUST take care of backward compatibility = issues. Incase a new extension is defined, the routers unaware of the = extension will=20 ignore the link. Care must be taken that this new extension does not = cause=20 routing loops to occur, when some of routers do not understand the=20 new extension. Thanks, Vishwas ________________________________ From: Mailing List on behalf of Acee Lindem Sent: Wed 12/1/2004 7:16 AM To: OSPF@PEACH.EASE.LSOFT.COM Subject: Re: router LSA with unknown link type Field, Brian wrote: >A couple of comments: > >* Is it clear from 2328 that when a router receives a router LSA with = an >unknown link type that the router should not drop the LSA but should = instead >store the intact LSA in its LSDB and continue to flood the intact LSA? > > It isn't really clear and hence the need for the Vishwas' draft. >* In the SPF algorithm, I wonder if it might make sense to tighten up = the >language some, specifically around (2b) in 16.1 (and maybe in other >locations): > > (b) Otherwise, W is a transit vertex (router or transit > network). Look up the vertex W's LSA (router-LSA or > network-LSA) in Area A's link state database. If the > LSA does not exist, or its LS age is equal to MaxAge, = or > it does not have a link back to vertex V, examine the > next link in V's LSA.[23] > >In the context of possible new link types, the text "... it does not = have a >link back to vertex V" may be too vague. Maybe we should specify the >specific link types that this link must have in order for this check to = succeed? > >* In section 4 of the proposed draft, I have two issues with the = following: > > Any future extensions SHOULD not cause any change in routing table > calculations. Such a change can result in routing loops because the = routers > unaware of the extension will ignore the link. > >I'm not convinced that we should close the door on defining new link = types >which define non-edge topo and which are carried in the router LSA. > I agree - what the draft should say is that the introduction of new link types should address backward compatibility issues within the area. >Further, I'm >not convinced that introducing these new link types will necessarily = cause >routing loops. > > It depends on the topology. However, if some routers are using the new links and others are ignoring them there is the potential for loops. >Consider some set of routers which forward all router LSAs intact (per = this >ID).Some routers support just link types 1-4 and others support 1-4 and = a new >link type (which defines topo info). All routers have the same LSDB = which contains >link types 1-4 and new ones. The old routers compute trees based on = types 1-4. >The new routers compute trees based on links 1-4 and the new links. = Instead of >causing forwarding loops, doesn't this just cause some routers (the = ones >that understand the new link types) to have short cuts in their topos? > > No - if you have router that doesn't understand the new types in the path to the router with the shortcut you could have a loop. >Now I could see forwarding loops being developed if routers, upon = seeing a >router LSA with an unknown link type, dropped the router LSA and did = not >storeit in its LSDB or flood it. But per 2328 or this spec, that's not = proper >behavior. > >Thanks >Brian > > > > >________________________________ > > From: Vishwas Manral [mailto:Vishwas@SINETT.COM] > Sent: Tuesday, November 30, 2004 9:57 AM > To: OSPF@PEACH.EASE.LSOFT.COM > Subject: Re: router LSA with unknown link type > > > Hi Mitchell, > > Good to hear from you and thanks for the comments. The basic = idea is >that the flooding happens normally, as is(we do not check if we = understand a >link type before flooding forward). This allows new link-types. > > The change done is to explicitly state that while doing the = routing >table calculations the link needs to be ignored. Maybe I will change = the >text to further clarify this. > > Thanks, > Vishwas > >________________________________ > > From: Mailing List on behalf of Erblichs > Sent: Tue 11/30/2004 8:43 AM > To: OSPF@PEACH.EASE.LSOFT.COM > Subject: Re: router LSA with unknown link type > > > > Vishwas & Acee, > > Are we viewing a area that has a mix of routers > that understand some link-types beyond 4 and some > routers that don't understand them???? > > In the perfect world shouldn't all the routers > within a area treat anything beyond 4 the same way? > > If this is the case, some option must be created > that is communicated that identifies the area's > link-types attributes. However... that seemed to > be mentioned and dropped.. > > I aggree the non-stated default should be "ignore". > 1) However, should the adj be dropped upon receipt of > recv a unknown LSA? This would remove inconsistencies > within a area vs allowing the issue to exist in later > implimentations. > > 2) "silently ignored" ; Else should a log entry be = present > that a LSDB inconsistency exists within the LSDB? To > prevent a circular buffer from potentially filling with > this msg type, only every so X entries be logged. So, I > question what is ment by "silently ignored" and why? = IMO, > "silently ignore" is probably not appropriate due to = the > reasons for not knowing why routing Loops can/are = existing > in the selected routes. > > 3) should it be mentioned that a DR/BDR be always fully > aware of a super-set of link-types, and thus accept > them? If not then only the subset will be communicated > to "others". > > Mitchell Erblich > ----------------- > > > Vishwas Manral wrote: > > > > Hi Acee, > > > > I am attaching the document where I have added, exactly what = you >have > > stated. > > > > Thanks, > > Vishwas > > > > -----Original Message----- > > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On = Behalf Of >Acee > > Lindem > > Sent: Tuesday, November 30, 2004 6:30 PM > > To: OSPF@PEACH.EASE.LSOFT.COM > > Subject: Re: router LSA with unknown link type > > > > Vishwas Manral wrote: > > > > > Hi Acee, > > > > > > Here goes the link: - > > > > > >http://www.ietf.org/internet-drafts/draft-manral-ospf-router-lsa-unknown= > > -type-00.txt > > > > > > Do let me know your views? > > > > Hi Vishwas, > > > > I feel we should move forward with support for the "silently >ignore" > > option. I think > > that you should add a section with a caveat that states that = the > > addition of new link types > > will still have compatibility implications since there is the >potential > > for routing loops if > > some routers in the area support the new types and others = ignore >them. > > However, > > the situation is better than what we have today. > > > > Thanks, > > Acee > > > > > > > > Thanks, > > > Vishwas > > > > > > > > >------------------------------------------------------------------------= > > > *From:* Mailing List on behalf of Vishwas Manral > > > *Sent:* Thu 11/25/2004 9:48 PM > > > *To:* OSPF@PEACH.EASE.LSOFT.COM > > > *Subject:* Re: router LSA with unknown link type > > > > > > Hi Acee, > > > > > > I think we must not forget there can be malicious = violations of >the > > > protocol too, as Tony rightly specified we need to specify = the > > behavior > > > when unexpected or corrupt data is received. > > > > > > As you stated, I intend to post a short draft on this soon. > > > > > > Thanks, > > > Vishwas > > > -----Original Message----- > > > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On = Behalf >Of > > Acee > > > Lindem > > > Sent: Thursday, November 25, 2004 10:44 PM > > > To: OSPF@PEACH.EASE.LSOFT.COM > > > Subject: Re: router LSA with unknown link type > > > > > > All, > > > While it would have been better if RFC 2328 did precisely >specify what > > > to do with unknown link types the fact of the matter is = that it > > doesn't. > > > IMHO, > > > we'd need a short draft in order to formally specify this = (or > > concensus > > > and inclusion > > > in the RFC 2740 respin). At this point, the = implementation(s) >that > > > generate(s) > > > the unknown link types is/are the ones in violation of the >protocol. > > > > > > Speaking as a WG member, I really don't like the idea of >extending the > > > protocol > > > using unknown link types UNLESS the new types are in fact a >different > > > type of > > > intra-area topological edge in the SPF graph. Once we open = it up >I can > > > envision people > > > trying to cram all sorts of non-link data in the router = LSA. If >we > > want > > > to extend the > > > protocol past what it does today there are cleaner ways of = doing >it > > > (e.g., new LSA types > > > supporting TLVs). > > > > > > Thanks, > > > Acee > > > > > > > > > Nitin Kakkar wrote: > > > > > > >IMHO I can think of two possibilities for this condition > > > > > > > >1) Some error in LSA creation, which overwrite link type = field. >: > > This > > > >should be reflected in checksum error and should be = handled >such. > > > > > > > >2) Some new invension which adds to the existing 4 types = of >Link > > Types > > > (or > > > >support for unknown link types): This Needs to have some = common > > > >understanding (RFC etc) to handle this. I feel that they = can be > > handled > > > like > > > >unknwon LSA's (store & forward only, no routing calc's) > > > > > > > >HTH > > > >Nitin > > > > > > > >-----Original Message----- > > > >From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM]On = Behalf >Of > > Acee > > > >Lindem > > > >Sent: 2004Ae11OA24EO 21:37 > > > >To: OSPF@PEACH.EASE.LSOFT.COM > > > >Subject: Re: router LSA with unknown link type > > > > > > > > > > > >Field, Brian wrote: > > > > > > > > > > > > > > > >>If a router receives a router LSA that contains several = links >and > > > >>for one of the links, the link type field is not known, = should >the > > > >>router ignore the entire router LSA or just skip this one >link? > > > >> > > > >> > > > >> > > > >> > > > >Hi Brian, > > > >Unfortunately, the handling of unknown link types is not >specifically > > > >defined in RFC 2328. > > > >Since links types 1-4 are the only ones defined an >implementation > > > should > > > >probably log > > > >the invalid link type (with rate limiting). Whether it = ignores >the > > LSA > > > >or just the unknown link is > > > >implementation specific. If we were to move forward with = link >type > > > >extension it would not be > > > >backward compatible (at least not without knobs or other >mechanisms). > > > > > > > >Thanks, > > > >Acee > > > > > > > > > > > > > > > >>Thanks > > > >>Brian > > > >> > > > >> > > > >> > > > > > > > >------------------------------------------------------------------------= > > = Name: >draft-manral-ospf-router-lsa-unknown-type-01.txt > > draft-manral-ospf-router-lsa-unknown-type-01.txt = Type: >Plain Text (text/plain) > > = Encoding: >base64 > > = Description: >draft-manral-ospf-router-lsa-unknown-type-01.txt > > > > ------_=_NextPart_001_01C4D7C9.D3E43244 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable =0A= =0A= =0A= =0A= =0A= =0A= Re: router LSA with unknown link type=0A= =0A= =0A=
=0A=
Hi = folks,
=0A=
 
=0A=
>>I'm not convinced that we should = close the =0A= door on defining new link types
>>which define non-edge topo = and which =0A= are carried in the router LSA.
=0A=
> I agree - what the draft should say = is that the =0A= introduction of new link
> types should address backward = compatibility =0A= issues within the area.
=0A=
=0A=
 
=0A=
Would the following text be =0A= ok?

   Any future extensions = MUST take =0A= care of backward compatibility issues.
=0A=
   Incase a new extension =0A= is defined, the routers = unaware of =0A= the extension will
=0A=
   ignore the link. =0A= Care must be taken that this new extension does not cause
=0A=
   routing loops to occur, when = some of =0A= routers do not understand the
=0A=
   new =0A= extension.
=0A=
Thanks,
=0A=
Vishwas
=0A=

=0A=
=0A= From: Mailing List on behalf of Acee =0A= Lindem
Sent: Wed 12/1/2004 7:16 AM
To: =0A= OSPF@PEACH.EASE.LSOFT.COM
Subject: Re: router LSA with unknown = link =0A= type

=0A=
=0A=

Field, Brian wrote:

>A couple of =0A= comments:
>
>* Is it clear from 2328 that when a router = receives a =0A= router LSA with an
>unknown link type that the router should not = drop the =0A= LSA but should instead
>store the intact LSA in its LSDB and = continue to =0A= flood the intact LSA?
>
>
It isn't really clear and hence = the =0A= need for the Vishwas' draft.

>* In the SPF algorithm, I wonder = if it =0A= might make sense to tighten up the
>language some, specifically = around =0A= (2b) in 16.1 (and maybe in =0A= other
>locations):
>
>     &nb= sp;      =0A= (b) Otherwise, W is a transit vertex (router or =0A= transit
>         &nbs= p;      =0A= network).  Look up the vertex W's LSA (router-LSA =0A= or
>          &nb= sp;     =0A= network-LSA) in Area A's link state database.  If =0A= the
>          &n= bsp;     =0A= LSA does not exist, or its LS age is equal to MaxAge, =0A= or
>          &nb= sp;     =0A= it does not have a link back to vertex V, examine =0A= the
>          &n= bsp;     =0A= next link in V's LSA.[23]
>
>In the context of possible new = link =0A= types, the text "... it does not have a
>link back to vertex V" = may be too =0A= vague.  Maybe we should specify the
>specific link types that = this =0A= link must have in order for this check to succeed?
>
>* In = section 4 =0A= of the proposed draft, I have two issues with the =0A= following:
>
>   Any future extensions SHOULD not = cause =0A= any change in routing table
>   calculations. Such a = change can =0A= result in routing loops because the routers
>   unaware = of the =0A= extension will ignore the link.
>
>I'm not convinced that we = should =0A= close the door on defining new link types
>which define non-edge = topo and =0A= which are carried in the router LSA.
>
I agree - what the draft = should =0A= say is that the introduction of new link
types should = address
backward =0A= compatibility issues within the area.

>Further, I'm
>not =0A= convinced that introducing these new link types will necessarily =0A= cause
>routing loops.
>
>
It depends on the = topology. =0A= However, if some routers are using the new
links and
others are = ignoring =0A= them there is the potential for loops.


>Consider some set = of =0A= routers which forward all router LSAs intact (per this
>ID).Some = routers =0A= support just link types 1-4 and others support 1-4 and a new
>link = type =0A= (which defines topo info).   All routers have the same LSDB = which =0A= contains
>link types 1-4 and new ones.  The old routers = compute trees =0A= based on types 1-4.
>The new routers compute trees based on links = 1-4 and =0A= the new links.  Instead of
>causing forwarding loops, doesn't = this =0A= just cause some routers (the ones
>that understand the new link = types) to =0A= have short cuts in their topos?
>
>
No - if you have = router that =0A= doesn't understand the new types in the
path to the router with =0A= the
shortcut you could have a loop.


>Now I could see = forwarding =0A= loops being developed if routers, upon seeing a
>router LSA with = an =0A= unknown link type, dropped the router LSA and did not
>storeit in = its LSDB =0A= or flood it.  But per 2328 or this spec, that's not =0A= proper
>behavior.
>
>Thanks
>Brian
>
>= ;
>
>
>________________________________
>
>=         =0A= From: Vishwas Manral [mailto:Vishwas@SINETT.COM]
>=         =0A= Sent: Tuesday, November 30, 2004 9:57 =0A= AM
>        To: =0A= OSPF@PEACH.EASE.LSOFT.COM
>      &nbs= p; =0A= Subject: Re: router LSA with unknown link =0A= type
>
>
>        = Hi =0A= Mitchell,
>
>        Good = to hear =0A= from you and thanks for the comments. The basic idea is
>that the = flooding =0A= happens normally, as is(we do not check if we understand a
>link = type =0A= before flooding forward). This allows new =0A= link-types.
>
>        = The change =0A= done is to explicitly state that while doing the routing
>table =0A= calculations the link needs to be ignored. Maybe I will change = the
>text =0A= to further clarify =0A= this.
>
>        =0A= Thanks,
>        =0A= Vishwas
>
>________________________________
>
>&n= bsp;       =0A= From: Mailing List on behalf of =0A= Erblichs
>        Sent: Tue = 11/30/2004 =0A= 8:43 AM
>        To: =0A= OSPF@PEACH.EASE.LSOFT.COM
>      &nbs= p; =0A= Subject: Re: router LSA with unknown link =0A= type
>
>
>
>      &= nbsp; =0A= Vishwas & =0A= Acee,
>
>        &nbs= p;       =0A= Are we viewing a area that has a mix of =0A= routers
>         &nbs= p;      =0A= that understand some link-types beyond 4 and =0A= some
>          &= nbsp;     =0A= routers that don't understand =0A= them????
>
>        &= nbsp;       =0A= In the perfect world shouldn't all the =0A= routers
>         &nbs= p;      =0A= within a area treat anything beyond 4 the same =0A= way?
>
>         = ;       =0A= If this is the case, some option must be =0A= created
>         &nbs= p;      =0A= that is communicated that identifies the =0A= area's
>          = ;      =0A= link-types attributes. However... that seemed =0A= to
>          &nb= sp;     =0A= be mentioned and =0A= dropped..
>
>        =         =0A= I aggree the non-stated default should be =0A= "ignore".
>         &n= bsp;      =0A= 1) However, should the adj be dropped upon receipt =0A= of
>          &nb= sp;     =0A= recv a unknown LSA? This would remove =0A= inconsistencies
>        &n= bsp;       =0A= within a area vs allowing the issue to exist in =0A= later
>          =       =0A= implimentations.
>
>       = ;         =0A= 2) "silently ignored" ; Else should a log entry be =0A= present
>         &nbs= p;       =0A= that a LSDB inconsistency exists within the LSDB? =0A= To
>          &nb= sp;     =0A= prevent a circular buffer from potentially filling =0A= with
>          &= nbsp;     =0A= this msg type, only every so X entries be logged. So, =0A= I
>          &nbs= p;     =0A= question what is ment by "silently ignored" and why? =0A= IMO,
>          &= nbsp;     =0A= "silently ignore" is probably not appropriate due to =0A= the
>          &n= bsp;     =0A= reasons for not knowing why routing Loops can/are =0A= existing
>         &nb= sp;      =0A= in the selected =0A= routes.
>
>        &n= bsp;       =0A= 3) should it be mentioned that a DR/BDR be always =0A= fully
>          =       =0A= aware of a super-set of link-types, and thus =0A= accept
>          = ;      =0A= them? If not then only the subset will be =0A= communicated
>         = ;       =0A= to =0A= "others".
>
>        =         =0A= Mitchell =0A= Erblich
>         &nbs= p;      =0A= -----------------
>
>
>     &n= bsp;  =0A= Vishwas Manral wrote:
>        =0A= >
>        > Hi =0A= Acee,
>        =0A= >
>        > I am = attaching the =0A= document where I have added, exactly what =0A= you
>have
>        > =0A= stated.
>        =0A= >
>        > =0A= Thanks,
>        > =0A= Vishwas
>        =0A= >
>        > = -----Original =0A= Message-----
>        > = From: =0A= Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.CO= M] On =0A= Behalf Of
>Acee
>        = > =0A= Lindem
>        > Sent: = Tuesday, =0A= November 30, 2004 6:30 = PM
>        > =0A= To: = OSPF@PEACH.EASE.LSOFT.COM
>      &nbs= p; =0A= > Subject: Re: router LSA with unknown link =0A= type
>        =0A= >
>        > Vishwas = Manral =0A= wrote:
>        =0A= >
>        > > Hi =0A= Acee,
>        > =0A= >
>        > > Here = goes the =0A= link: -
>        > =0A= >
>        >
>http://www.ietf.org/internet-drafts/draft-manral-ospf-router-lsa= -unknown
>        =0A= > -type-00.txt
>        > =0A= >
>        > > Do let = me know =0A= your views?
>        =0A= >
>        > Hi =0A= Vishwas,
>        =0A= >
>        > I feel we = should =0A= move forward with support for the =0A= "silently
>ignore"
>       = ; > =0A= option. I think
>        > = that you =0A= should add a section with a caveat that states that =0A= the
>        > addition of = new link =0A= types
>        > will still = have =0A= compatibility implications since there is =0A= the
>potential
>        = > for =0A= routing loops if
>        > = some =0A= routers in the area support the new types and others =0A= ignore
>them.
>        = > =0A= However,
>        > the = situation is =0A= better than what we have =0A= today.
>        =0A= >
>        > =0A= Thanks,
>        > =0A= Acee
>        =0A= >
>        > =0A= >
>        > > =0A= Thanks,
>        > > =0A= Vishwas
>        > =0A= >
>        > =0A= >
>        =0A= >
>-------------------------------------------------------------= -----------
>        =0A= > > *From:* Mailing List on behalf of Vishwas =0A= Manral
>        > > = *Sent:* Thu =0A= 11/25/2004 9:48 PM
>        = > > =0A= *To:* =0A= OSPF@PEACH.EASE.LSOFT.COM
>      &nbs= p; > =0A= > *Subject:* Re: router LSA with unknown link =0A= type
>        > =0A= >
>        > > Hi =0A= Acee,
>        > =0A= >
>        > > I think = we must =0A= not forget there can be malicious violations =0A= of
>the
>        > = > =0A= protocol too, as Tony rightly specified we need to specify =0A= the
>        > =0A= behavior
>        > > = when =0A= unexpected or corrupt data is =0A= received.
>        > =0A= >
>        > > As you = stated, =0A= I intend to post a short draft on this =0A= soon.
>        > =0A= >
>        > > =0A= Thanks,
>        > > =0A= Vishwas
>        > > =0A= -----Original = Message-----
>        =0A= > > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.CO= M] On =0A= Behalf
>Of
>        > =0A= Acee
>        > > =0A= Lindem
>        > > Sent: =0A= Thursday, November 25, 2004 10:44 =0A= PM
>        > > To: =0A= OSPF@PEACH.EASE.LSOFT.COM
>      &nbs= p; > =0A= > Subject: Re: router LSA with unknown link =0A= type
>        > =0A= >
>        > > =0A= All,
>        > > While = it would =0A= have been better if RFC 2328 did precisely
>specify =0A= what
>        > > to do = with =0A= unknown link types the fact of the matter is that =0A= it
>        > =0A= doesn't.
>        > > =0A= IMHO,
>        > > we'd = need a =0A= short draft in order to formally specify this =0A= (or
>        > =0A= concensus
>        > > = and =0A= inclusion
>        > > in = the RFC =0A= 2740 respin). At this point, the =0A= implementation(s)
>that
>      =   =0A= > > generate(s)
>        = > =0A= > the unknown link types is/are the ones in violation of =0A= the
>protocol.
>        = > =0A= >
>        > > = Speaking as a =0A= WG member, I really don't like the idea of
>extending =0A= the
>        > > =0A= protocol
>        > > = using =0A= unknown link types UNLESS the new types are in fact =0A= a
>different
>        = > > =0A= type of
>        > > = intra-area =0A= topological edge in the SPF graph. Once we open it up
>I =0A= can
>        > > envision =0A= people
>        > > = trying to =0A= cram all sorts of non-link data in the router LSA. =0A= If
>we
>        > =0A= want
>        > > to = extend =0A= the
>        > > protocol = past =0A= what it does today there are cleaner ways of =0A= doing
>it
>        > = > =0A= (e.g., new LSA types
>        = > > =0A= supporting TLVs).
>        > =0A= >
>        > > =0A= Thanks,
>        > > =0A= Acee
>        > =0A= >
>        > =0A= >
>        > > Nitin = Kakkar =0A= wrote:
>        > =0A= >
>        > > = >IMHO I can =0A= think of two possibilities for this =0A= condition
>        > > =0A= >
>        > > >1) = Some =0A= error in LSA creation, which overwrite link type =0A= field.
>:
>        > =0A= This
>        > > = >should be =0A= reflected in checksum error and should be =0A= handled
>such.
>        = > > =0A= >
>        > > >2) = Some new =0A= invension which adds to the existing 4 types =0A= of
>Link
>        > =0A= Types
>        > > =0A= (or
>        > > = >support for =0A= unknown link types): This Needs to have some =0A= common
>        > > =0A= >understanding (RFC etc) to handle this. I feel that they can =0A= be
>        > =0A= handled
>        > > =0A= like
>        > > = >unknwon =0A= LSA's (store & forward only, no routing =0A= calc's)
>        > > =0A= >
>        > > =0A= >HTH
>        > > =0A= >Nitin
>        > > =0A= >
>        > > =0A= >-----Original = Message-----
>        =0A= > > >From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.CO= M]On =0A= Behalf
>Of
>        > =0A= Acee
>        > > =0A= >Lindem
>        > > = >Sent: =0A= 2004Ae11OA24EO 21:37
>        = > > =0A= >To: =0A= OSPF@PEACH.EASE.LSOFT.COM
>      &nbs= p; > =0A= > >Subject: Re: router LSA with unknown link =0A= type
>        > > =0A= >
>        > > =0A= >
>        > > = >Field, =0A= Brian wrote:
>        > > =0A= >
>        > > =0A= >
>        > > =0A= >
>        > > = >>If a =0A= router receives a router LSA that contains several =0A= links
>and
>        > = > =0A= >>for one of the links, the link type field is not known, =0A= should
>the
>        > = > =0A= >>router ignore the entire router LSA or just skip this =0A= one
>link?
>        > = > =0A= >>
>        > > =0A= >>
>        > > =0A= >>
>        > > =0A= >>
>        > > = >Hi =0A= Brian,
>        > > =0A= >Unfortunately, the handling of unknown link types is =0A= not
>specifically
>       = > =0A= > >defined in RFC = 2328.
>        =0A= > > >Since links types 1-4 are the only ones defined =0A= an
>implementation
>       = ; > =0A= > should
>        > > =0A= >probably log
>        > = > =0A= >the invalid link type (with rate limiting). Whether it =0A= ignores
>the
>        = > =0A= LSA
>        > > >or = just the =0A= unknown link is
>        > = > =0A= >implementation specific. If we were to move forward with =0A= link
>type
>        > = > =0A= >extension it would not = be
>        =0A= > > >backward compatible (at least not without knobs or =0A= other
>mechanisms).
>      &nbs= p; > =0A= > >
>        > > =0A= >Thanks,
>        > > =0A= >Acee
>        > > =0A= >
>        > > =0A= >
>        > > =0A= >
>        > > =0A= >>Thanks
>        > = > =0A= >>Brian
>        > = > =0A= >>
>        > > =0A= >>
>        > > =0A= >>
>        > =0A= >
>        =0A= >
>        =0A= >
>-------------------------------------------------------------= -----------
>        =0A= >           &nb= sp;           &nbs= p;            = ;            =            =0A= Name:
>draft-manral-ospf-router-lsa-unknown-type-01.txt
>&nbs= p;       =0A= >    =0A= draft-manral-ospf-router-lsa-unknown-type-01.txt    &= nbsp;  =0A= Type:
>Plain Text =0A= (text/plain)
>        =0A= >           &nb= sp;           &nbs= p;            = ;            =        =0A= Encoding:
>base64
>       = =0A= >           &nb= sp;           &nbs= p;            = ;            =     =0A= Description:
>draft-manral-ospf-router-lsa-unknown-type-01.txt
&= gt;
>
>
>

=0A= =0A= =0A= ------_=_NextPart_001_01C4D7C9.D3E43244-- From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 1 16:30:43 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id QAA26930 for ; Wed, 1 Dec 2004 16:30:43 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <15.00EF8152@cherry.ease.lsoft.com>; Wed, 1 Dec 2004 16:30:42 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47560018 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 1 Dec 2004 16:30:37 -0500 Received: from 64.102.122.149 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 1 Dec 2004 16:30:36 -0400 Received: from rtp-core-2.cisco.com (64.102.124.13) by rtp-iport-2.cisco.com with ESMTP; 01 Dec 2004 16:30:40 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-2.cisco.com (8.12.10/8.12.6) with ESMTP id iB1LUZtX006725 for ; Wed, 1 Dec 2004 16:30:36 -0500 (EST) Received: from [64.102.48.185] (dhcp-64-102-48-185.cisco.com [64.102.48.185]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BDS36732; Wed, 1 Dec 2004 13:30:37 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41AE37FC.4040207@cisco.com> Date: Wed, 1 Dec 2004 16:30:36 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: router LSA with unknown link type To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: Precedence: list Content-Transfer-Encoding: 7bit Vishwas Manral wrote: > Hi folks, > > >>I'm not convinced that we should close the door on defining new link > types > >>which define non-edge topo and which are carried in the router LSA. > > I agree - what the draft should say is that the introduction of new link > > types should address backward compatibility issues within the area. > > Would the following text be ok? Much better, I just didn't want to the draft to give the impression that ignoring unknown link types would solve all the backward compatibility issues. Thanks, Acee > > Any future extensions MUST take care of backward compatibility issues. > Incase a new extension is defined, the routers unaware of the > extension will > ignore the link. Care must be taken that this new extension does > not cause > routing loops to occur, when some of routers do not understand the > new extension. > Thanks, > Vishwas > > ------------------------------------------------------------------------ > *From:* Mailing List on behalf of Acee Lindem > *Sent:* Wed 12/1/2004 7:16 AM > *To:* OSPF@PEACH.EASE.LSOFT.COM > *Subject:* Re: router LSA with unknown link type > > Field, Brian wrote: > > >A couple of comments: > > > >* Is it clear from 2328 that when a router receives a router LSA with an > >unknown link type that the router should not drop the LSA but should > instead > >store the intact LSA in its LSDB and continue to flood the intact LSA? > > > > > It isn't really clear and hence the need for the Vishwas' draft. > > >* In the SPF algorithm, I wonder if it might make sense to tighten up the > >language some, specifically around (2b) in 16.1 (and maybe in other > >locations): > > > > (b) Otherwise, W is a transit vertex (router or transit > > network). Look up the vertex W's LSA (router-LSA or > > network-LSA) in Area A's link state database. If the > > LSA does not exist, or its LS age is equal to MaxAge, or > > it does not have a link back to vertex V, examine the > > next link in V's LSA.[23] > > > >In the context of possible new link types, the text "... it does not > have a > >link back to vertex V" may be too vague. Maybe we should specify the > >specific link types that this link must have in order for this check > to succeed? > > > >* In section 4 of the proposed draft, I have two issues with the > following: > > > > Any future extensions SHOULD not cause any change in routing table > > calculations. Such a change can result in routing loops because > the routers > > unaware of the extension will ignore the link. > > > >I'm not convinced that we should close the door on defining new link > types > >which define non-edge topo and which are carried in the router LSA. > > > I agree - what the draft should say is that the introduction of new link > types should address > backward compatibility issues within the area. > > >Further, I'm > >not convinced that introducing these new link types will necessarily > cause > >routing loops. > > > > > It depends on the topology. However, if some routers are using the new > links and > others are ignoring them there is the potential for loops. > > > >Consider some set of routers which forward all router LSAs intact > (per this > >ID).Some routers support just link types 1-4 and others support 1-4 > and a new > >link type (which defines topo info). All routers have the same LSDB > which contains > >link types 1-4 and new ones. The old routers compute trees based on > types 1-4. > >The new routers compute trees based on links 1-4 and the new links. > Instead of > >causing forwarding loops, doesn't this just cause some routers (the ones > >that understand the new link types) to have short cuts in their topos? > > > > > No - if you have router that doesn't understand the new types in the > path to the router with the > shortcut you could have a loop. > > > >Now I could see forwarding loops being developed if routers, upon > seeing a > >router LSA with an unknown link type, dropped the router LSA and did not > >storeit in its LSDB or flood it. But per 2328 or this spec, that's > not proper > >behavior. > > > >Thanks > >Brian > > > > > > > > > >________________________________ > > > > From: Vishwas Manral [mailto:Vishwas@SINETT.COM] > > Sent: Tuesday, November 30, 2004 9:57 AM > > To: OSPF@PEACH.EASE.LSOFT.COM > > Subject: Re: router LSA with unknown link type > > > > > > Hi Mitchell, > > > > Good to hear from you and thanks for the comments. The basic > idea is > >that the flooding happens normally, as is(we do not check if we > understand a > >link type before flooding forward). This allows new link-types. > > > > The change done is to explicitly state that while doing the > routing > >table calculations the link needs to be ignored. Maybe I will change the > >text to further clarify this. > > > > Thanks, > > Vishwas > > > >________________________________ > > > > From: Mailing List on behalf of Erblichs > > Sent: Tue 11/30/2004 8:43 AM > > To: OSPF@PEACH.EASE.LSOFT.COM > > Subject: Re: router LSA with unknown link type > > > > > > > > Vishwas & Acee, > > > > Are we viewing a area that has a mix of routers > > that understand some link-types beyond 4 and some > > routers that don't understand them???? > > > > In the perfect world shouldn't all the routers > > within a area treat anything beyond 4 the same way? > > > > If this is the case, some option must be created > > that is communicated that identifies the area's > > link-types attributes. However... that seemed to > > be mentioned and dropped.. > > > > I aggree the non-stated default should be "ignore". > > 1) However, should the adj be dropped upon receipt of > > recv a unknown LSA? This would remove inconsistencies > > within a area vs allowing the issue to exist in later > > implimentations. > > > > 2) "silently ignored" ; Else should a log entry be > present > > that a LSDB inconsistency exists within the LSDB? To > > prevent a circular buffer from potentially filling with > > this msg type, only every so X entries be logged. So, I > > question what is ment by "silently ignored" and why? IMO, > > "silently ignore" is probably not appropriate due to the > > reasons for not knowing why routing Loops can/are > existing > > in the selected routes. > > > > 3) should it be mentioned that a DR/BDR be always fully > > aware of a super-set of link-types, and thus accept > > them? If not then only the subset will be communicated > > to "others". > > > > Mitchell Erblich > > ----------------- > > > > > > Vishwas Manral wrote: > > > > > > Hi Acee, > > > > > > I am attaching the document where I have added, exactly > what you > >have > > > stated. > > > > > > Thanks, > > > Vishwas > > > > > > -----Original Message----- > > > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On > Behalf Of > >Acee > > > Lindem > > > Sent: Tuesday, November 30, 2004 6:30 PM > > > To: OSPF@PEACH.EASE.LSOFT.COM > > > Subject: Re: router LSA with unknown link type > > > > > > Vishwas Manral wrote: > > > > > > > Hi Acee, > > > > > > > > Here goes the link: - > > > > > > > > >http://www.ietf.org/internet-drafts/draft-manral-ospf-router-lsa-unknown > > > -type-00.txt > > > > > > > > Do let me know your views? > > > > > > Hi Vishwas, > > > > > > I feel we should move forward with support for the "silently > >ignore" > > > option. I think > > > that you should add a section with a caveat that states > that the > > > addition of new link types > > > will still have compatibility implications since there is the > >potential > > > for routing loops if > > > some routers in the area support the new types and others > ignore > >them. > > > However, > > > the situation is better than what we have today. > > > > > > Thanks, > > > Acee > > > > > > > > > > > Thanks, > > > > Vishwas > > > > > > > > > > > > >------------------------------------------------------------------------ > > > > *From:* Mailing List on behalf of Vishwas Manral > > > > *Sent:* Thu 11/25/2004 9:48 PM > > > > *To:* OSPF@PEACH.EASE.LSOFT.COM > > > > *Subject:* Re: router LSA with unknown link type > > > > > > > > Hi Acee, > > > > > > > > I think we must not forget there can be malicious > violations of > >the > > > > protocol too, as Tony rightly specified we need to > specify the > > > behavior > > > > when unexpected or corrupt data is received. > > > > > > > > As you stated, I intend to post a short draft on this soon. > > > > > > > > Thanks, > > > > Vishwas > > > > -----Original Message----- > > > > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On > Behalf > >Of > > > Acee > > > > Lindem > > > > Sent: Thursday, November 25, 2004 10:44 PM > > > > To: OSPF@PEACH.EASE.LSOFT.COM > > > > Subject: Re: router LSA with unknown link type > > > > > > > > All, > > > > While it would have been better if RFC 2328 did precisely > >specify what > > > > to do with unknown link types the fact of the matter is > that it > > > doesn't. > > > > IMHO, > > > > we'd need a short draft in order to formally specify this (or > > > concensus > > > > and inclusion > > > > in the RFC 2740 respin). At this point, the implementation(s) > >that > > > > generate(s) > > > > the unknown link types is/are the ones in violation of the > >protocol. > > > > > > > > Speaking as a WG member, I really don't like the idea of > >extending the > > > > protocol > > > > using unknown link types UNLESS the new types are in fact a > >different > > > > type of > > > > intra-area topological edge in the SPF graph. Once we > open it up > >I can > > > > envision people > > > > trying to cram all sorts of non-link data in the router > LSA. If > >we > > > want > > > > to extend the > > > > protocol past what it does today there are cleaner ways > of doing > >it > > > > (e.g., new LSA types > > > > supporting TLVs). > > > > > > > > Thanks, > > > > Acee > > > > > > > > > > > > Nitin Kakkar wrote: > > > > > > > > >IMHO I can think of two possibilities for this condition > > > > > > > > > >1) Some error in LSA creation, which overwrite link type > field. > >: > > > This > > > > >should be reflected in checksum error and should be handled > >such. > > > > > > > > > >2) Some new invension which adds to the existing 4 types of > >Link > > > Types > > > > (or > > > > >support for unknown link types): This Needs to have some > common > > > > >understanding (RFC etc) to handle this. I feel that they > can be > > > handled > > > > like > > > > >unknwon LSA's (store & forward only, no routing calc's) > > > > > > > > > >HTH > > > > >Nitin > > > > > > > > > >-----Original Message----- > > > > >From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM]On > Behalf > >Of > > > Acee > > > > >Lindem > > > > >Sent: 2004Ae11OA24EO 21:37 > > > > >To: OSPF@PEACH.EASE.LSOFT.COM > > > > >Subject: Re: router LSA with unknown link type > > > > > > > > > > > > > > >Field, Brian wrote: > > > > > > > > > > > > > > > > > > > >>If a router receives a router LSA that contains several > links > >and > > > > >>for one of the links, the link type field is not known, > should > >the > > > > >>router ignore the entire router LSA or just skip this one > >link? > > > > >> > > > > >> > > > > >> > > > > >> > > > > >Hi Brian, > > > > >Unfortunately, the handling of unknown link types is not > >specifically > > > > >defined in RFC 2328. > > > > >Since links types 1-4 are the only ones defined an > >implementation > > > > should > > > > >probably log > > > > >the invalid link type (with rate limiting). Whether it > ignores > >the > > > LSA > > > > >or just the unknown link is > > > > >implementation specific. If we were to move forward with > link > >type > > > > >extension it would not be > > > > >backward compatible (at least not without knobs or other > >mechanisms). > > > > > > > > > >Thanks, > > > > >Acee > > > > > > > > > > > > > > > > > > > >>Thanks > > > > >>Brian > > > > >> > > > > >> > > > > >> > > > > > > > > > > > >------------------------------------------------------------------------ > > > Name: > >draft-manral-ospf-router-lsa-unknown-type-01.txt > > > draft-manral-ospf-router-lsa-unknown-type-01.txt Type: > >Plain Text (text/plain) > > > Encoding: > >base64 > > > Description: > >draft-manral-ospf-router-lsa-unknown-type-01.txt > > > > > > > > > From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 2 04:46:24 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id EAA24096 for ; Thu, 2 Dec 2004 04:46:23 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <10.00EF8E6E@cherry.ease.lsoft.com>; Thu, 2 Dec 2004 4:46:22 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47613998 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 2 Dec 2004 04:46:16 -0500 Received: from 202.43.216.211 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Thu, 2 Dec 2004 04:46:15 -0400 Received: from [202.96.96.35] by web15408.mail.cnb.yahoo.com via HTTP; Thu, 02 Dec 2004 17:46:05 CST MIME-Version: 1.0 Content-Type: text/plain; charset=gb2312 Content-Transfer-Encoding: 8bit Message-ID: <20041202094605.47235.qmail@web15408.mail.cnb.yahoo.com> Date: Thu, 2 Dec 2004 17:46:05 +0800 Reply-To: Mailing List Sender: Mailing List From: Jing Shen Subject: Number of Routes and network stability Comments: To: routing discussion , end-to-end list To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: 8bit Hi, Some vendors recommended that number of routers within one OSPF area should not exceed 50, some others recommended number of routes within one area should not exceed 3000. To my understanding, OSPF stability is directly related to link stability, radius of an OSPF area and OSPF implementation( router hardware, methodology of link status processing). But, is there any research done on this topic? or how are those recommendation derived ? thanks Jing Shen _________________________________________________________ Do You Yahoo!? ×¢²áÊÀ½çÒ»Á÷Æ·ÖʵÄÑÅ»¢Ãâ·ÑµçÓÊ http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/ From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 2 07:52:45 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id HAA10773 for ; Thu, 2 Dec 2004 07:52:44 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <9.00EF903D@cherry.ease.lsoft.com>; Thu, 2 Dec 2004 7:47:39 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47657337 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 2 Dec 2004 07:46:44 -0500 Received: from 132.151.1.176 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Thu, 2 Dec 2004 07:36:43 -0400 Received: from CNRI.Reston.VA.US (localhost [127.0.0.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id HAA09175; Thu, 2 Dec 2004 07:36:45 -0500 (EST) Mime-Version: 1.0 Content-Type: Multipart/Mixed; Boundary="NextPart" Message-ID: <200412021236.HAA09175@ietf.org> Date: Thu, 2 Dec 2004 07:36:45 -0500 Reply-To: Mailing List Sender: Mailing List From: Internet-Drafts@ietf.org Subject: I-D ACTION:draft-ietf-ospf-cap-04.txt Comments: To: i-d-announce@ietf.org To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list --NextPart A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Open Shortest Path First IGP Working Group of the IETF. Title : Extensions to OSPF for Advertising Optional Router Capabilities Author(s) : A. Lindem, et al. Filename : draft-ietf-ospf-cap-04.txt Pages : 13 Date : 2004-12-1 It is useful for routers in an OSPF routing domain to know the capabilities of their neighbors and other routers in the OSPF routing domain. This draft proposes extensions to OSPF for advertising optional router capabilities. A new Router Information (RI) opaque LSA is proposed for this purpose. A URL for this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-ospf-cap-04.txt To remove yourself from the I-D Announcement list, send a message to i-d-announce-request@ietf.org with the word unsubscribe in the body of the message. You can also visit https://www1.ietf.org/mailman/listinfo/I-D-announce to change your subscription settings. Internet-Drafts are also available by anonymous FTP. Login with the username "anonymous" and a password of your e-mail address. After logging in, type "cd internet-drafts" and then "get draft-ietf-ospf-cap-04.txt". A list of Internet-Drafts directories can be found in http://www.ietf.org/shadow.html or ftp://ftp.ietf.org/ietf/1shadow-sites.txt Internet-Drafts can also be obtained by e-mail. Send a message to: mailserv@ietf.org. In the body type: "FILE /internet-drafts/draft-ietf-ospf-cap-04.txt". NOTE: The mail server at ietf.org can return the document in MIME-encoded form by using the "mpack" utility. To use this feature, insert the command "ENCODING mime" before the "FILE" command. To decode the response(s), you will need "munpack" or a MIME-compliant mail reader. Different MIME-compliant mail readers exhibit different behavior, especially when dealing with "multipart" MIME messages (i.e. documents which have been split up into multiple messages), so check your local documentation on how to manipulate these messages. Below is the data which will enable a MIME compliant mail reader implementation to automatically retrieve the ASCII version of the Internet-Draft. --NextPart Content-Type: Multipart/Alternative; Boundary="OtherAccess" --OtherAccess Content-Type: Message/External-body; access-type="mail-server"; server="mailserv@ietf.org" Content-Type: text/plain Content-ID: <2004-12-2080504.I-D@ietf.org> ENCODING mime FILE /internet-drafts/draft-ietf-ospf-cap-04.txt --OtherAccess Content-Type: Message/External-body; name="draft-ietf-ospf-cap-04.txt"; site="ftp.ietf.org"; access-type="anon-ftp"; directory="internet-drafts" Content-Type: text/plain Content-ID: <2004-12-2080504.I-D@ietf.org> --OtherAccess-- --NextPart-- From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 2 10:37:32 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id KAA29821 for ; Thu, 2 Dec 2004 10:37:31 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <7.00EF942F@cherry.ease.lsoft.com>; Thu, 2 Dec 2004 10:37:26 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47676596 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 2 Dec 2004 10:37:24 -0500 Received: from 47.129.242.57 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Thu, 2 Dec 2004 10:37:24 -0400 Received: from zrtpd0j7.us.nortel.com (zrtpd0j7.us.nortel.com [47.140.203.25]) by zcars04f.nortelnetworks.com (Switch-2.2.6/Switch-2.2.0) with ESMTP id iB2FbMo00698 for ; Thu, 2 Dec 2004 10:37:22 -0500 (EST) Received: by zrtpd0j7.us.nortel.com with Internet Mail Service (5.5.2653.19) id ; Thu, 2 Dec 2004 10:37:17 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C4D884.C9CAF1F0" Message-ID: Date: Thu, 2 Dec 2004 10:37:06 -0500 Reply-To: Mailing List Sender: Mailing List From: Andrew Smith Subject: Re: Number of Routes and network stability To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C4D884.C9CAF1F0 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: quoted-printable The recommendation for number of routers per area is usually derived by considering the amount of processor power and memory available to the routers in an area. Usually you consider the lowest common denominator. = This means the smallest router (the router with the fewest resources) limits = the size of the area. A good rule of thumb is no more than 100 routers per area. If you try = to keep an initial design to 50-70 routers that usually allows room to = grow and recover from a network crisis. The vendors that say they can do 3000 routers per area are giving a scalability number for that box. This particular router can achieve = 3000 routers per area "under the proper circumstances". This is good to know = for how much the box can take, not how high to scale your OSPF areas. Regards, Andy Smith -----Original Message----- From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On Behalf Of Jing = Shen Sent: Thursday, December 02, 2004 4:46 AM To: OSPF@PEACH.EASE.LSOFT.COM Subject: Number of Routes and network stability Hi, Some vendors recommended that number of routers within one OSPF area should not exceed 50, some others recommended number of routes within one area should not exceed 3000. To my understanding, OSPF stability is directly related to link stability, radius of an OSPF area and OSPF implementation( router hardware, methodology of link status processing). But, is there any research done on this topic? or how are those recommendation derived ? thanks Jing Shen _________________________________________________________ Do You Yahoo!? =D7=A2=B2=E1=CA=C0=BD=E7=D2=BB=C1=F7=C6=B7=D6=CA=B5=C4=D1=C5=BB=A2=C3=E2= =B7=D1=B5=E7=D3=CA http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/ ------_=_NextPart_001_01C4D884.C9CAF1F0 Content-Type: text/html; charset="gb2312" Content-Transfer-Encoding: quoted-printable RE: Number of Routes and network stability

The recommendation for number of routers per area is = usually derived by considering the amount of processor power and memory = available to the routers in an area. Usually you consider the lowest = common denominator. This means the smallest router (the router with the = fewest resources) limits the size of the area.

A good rule of thumb is no more than 100 routers per = area. If you try to keep an initial design to 50-70 routers that = usually allows room to grow and recover from a network = crisis.

The vendors that say they can do 3000 routers per = area are giving a scalability number for that box. This particular = router can achieve 3000 routers per area "under the proper = circumstances". This is good to know for how much the box can = take, not how high to scale your OSPF areas.

Regards,
Andy Smith

-----Original Message-----
From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.C= OM] On Behalf Of Jing Shen
Sent: Thursday, December 02, 2004 4:46 AM
To: OSPF@PEACH.EASE.LSOFT.COM
Subject: Number of Routes and network = stability


Hi,

Some vendors recommended that number of routers = within
one OSPF area should not exceed 50, some = others
recommended  number of routes within one area = should
not exceed 3000.

To my understanding, OSPF stability is = directly
related to link stability, radius of an OSPF area = and
OSPF implementation( router hardware, methodology = of
link status processing). But, is there any = research
done on this topic? or how are those = recommendation
derived ?

thanks

Jing Shen

_________________________________________________________
Do You Yahoo!?
=D7=A2=B2=E1=CA=C0=BD=E7=D2=BB=C1=F7=C6=B7=D6=CA=B5=C4=D1=C5=BB= =A2=C3=E2=B7=D1=B5=E7=D3=CA
http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.= yahoo.com/

------_=_NextPart_001_01C4D884.C9CAF1F0-- From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 2 20:29:05 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id UAA24657 for ; Thu, 2 Dec 2004 20:29:03 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <23.00EF9EB5@cherry.ease.lsoft.com>; Thu, 2 Dec 2004 20:28:56 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47735418 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 2 Dec 2004 20:28:44 -0500 Received: from 202.43.216.212 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Thu, 2 Dec 2004 20:28:43 -0400 Received: from [202.96.96.35] by web15409.mail.cnb.yahoo.com via HTTP; Fri, 03 Dec 2004 09:28:38 CST MIME-Version: 1.0 Content-Type: text/plain; charset=gb2312 Content-Transfer-Encoding: 8bit Message-ID: <20041203012838.83786.qmail@web15409.mail.cnb.yahoo.com> Date: Fri, 3 Dec 2004 09:28:38 +0800 Reply-To: Mailing List Sender: Mailing List From: Jing Shen Subject: Re: Number of Routes and network stability Comments: To: routing discussion To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: Precedence: list Content-Transfer-Encoding: 8bit Hi, Reading preivious post on OSPF list (http://peach.ease.lsoft.com/scripts/wa.exe?A2=ind0410&L=ospf&T=0&F=&S=&P=6696), it seems amount of LSA announcement is another possible reason for route flaping. Should it limit the number of link state announced on one interface ? regards > The recommendation for number of routers per area is > usually derived by > considering the amount of processor power and memory > available to the > routers in an area. Usually you consider the lowest > common denominator. This > means the smallest router (the router with the > fewest resources) limits the > size of the area. > ===== Jing Shen Data Communication Center HangZhou TeleCom HangZhou ZJ 310027 P.R.China ' spamcontrol ' _________________________________________________________ Do You Yahoo!? ×¢²áÊÀ½çÒ»Á÷Æ·ÖʵÄÑÅ»¢Ãâ·ÑµçÓÊ http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/ From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 2 21:47:45 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id VAA00312 for ; Thu, 2 Dec 2004 21:47:45 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <22.00EF9FBE@cherry.ease.lsoft.com>; Thu, 2 Dec 2004 21:47:44 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47742043 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 2 Dec 2004 21:47:40 -0500 Received: from 207.217.121.251 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Thu, 2 Dec 2004 21:47:40 -0400 Received: from user-2ivfitd.dialup.mindspring.com ([165.247.203.173] helo=earthlink.net) by pop-a065d10.pas.sa.earthlink.net with esmtp (Exim 3.33 #1) id 1Ca3Tw-0007Zj-00; Thu, 02 Dec 2004 18:47:41 -0800 X-Sender: "Erblichs" <@smtp.earthlink.net> (Unverified) X-Mailer: Mozilla 4.72 [en]C-gatewaynet (Win98; I) X-Accept-Language: en MIME-Version: 1.0 References: Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Message-ID: <41AFD41D.BCE09A6B@earthlink.net> Date: Thu, 2 Dec 2004 18:49:01 -0800 Reply-To: Mailing List Sender: Mailing List From: Erblichs Subject: Re: Number of Routes and network stability Comments: To: ajsmith@nortelnetworks.com To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: 8bit Andrew Smith, I don't think I agree with 90% of this. Available memory has to do with the max size of the LSDB, siumultaneous rexmit queues, etc, THAN the max number of routers supported in a area. Assuming that enough memory is available, link-stability and dead-router interval are more important than CPU capability wrt network stability. Next comes with the number & sizing of input queues, link-speed, and network topology. If the number of hellos and OSPF control pkts overload a CPU, then I hate to see the SPF timeframes, or what would happen if a large number of pkts are targeted to the router. If one says that they can't handle close to 3000 simultaneous links with other routers in a area, then IMO, they have a few issues with their code. I am NOT stating that 3000 simultaneous full adjs can be formed. But if you are dropping adjs because their are too many routers in the area and you thus are dropping (or delaing the processing of) hellos, then their is something wrong with the code or hardware. Support for a large number of routers within a area more has to do with IMO, the ability to decrease the hello interval and hello multiplier and still not drop adjs. Secondly, each router then COULD support fewer links and a failed router would have less of a topology effect. Mitchell Erblich ----------------- > Andrew Smith wrote: > > The recommendation for number of routers per area is usually derived > by considering the amount of processor power and memory available to > the routers in an area. Usually you consider the lowest common > denominator. This means the smallest router (the router with the > fewest resources) limits the size of the area. > > A good rule of thumb is no more than 100 routers per area. If you try > to keep an initial design to 50-70 routers that usually allows room to > grow and recover from a network crisis. > > The vendors that say they can do 3000 routers per area are giving a > scalability number for that box. This particular router can achieve > 3000 routers per area "under the proper circumstances". This is good > to know for how much the box can take, not how high to scale your OSPF > areas. > > Regards, > Andy Smith > > -----Original Message----- > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On Behalf Of > Jing Shen > Sent: Thursday, December 02, 2004 4:46 AM > To: OSPF@PEACH.EASE.LSOFT.COM > Subject: Number of Routes and network stability > > Hi, > > Some vendors recommended that number of routers within > one OSPF area should not exceed 50, some others > recommended number of routes within one area should > not exceed 3000. > > To my understanding, OSPF stability is directly > related to link stability, radius of an OSPF area and > OSPF implementation( router hardware, methodology of > link status processing). But, is there any research > done on this topic? or how are those recommendation > derived ? > > thanks > > Jing Shen > > _________________________________________________________ > Do You Yahoo!? > ×¢²áÊÀ½çÒ»Á÷Æ·ÖʵÄÑÅ»¢Ãâ·ÑµçÓÊ > http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/ From owner-ospf@PEACH.EASE.LSOFT.COM Fri Dec 3 04:02:47 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id EAA13739 for ; Fri, 3 Dec 2004 04:02:47 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <20.00EFA6CC@cherry.ease.lsoft.com>; Fri, 3 Dec 2004 4:02:47 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47769417 for OSPF@PEACH.EASE.LSOFT.COM; Fri, 3 Dec 2004 04:02:45 -0500 Received: from 204.176.140.238 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Fri, 3 Dec 2004 03:52:45 -0400 Received: from manikantan (dsl-TN-075.240.247.61.touchtelindia.net [61.247.240.75] (may be forged)) (authenticated bits=0) by mail2.webindia.com (8.13.1/8.13.1) with ESMTP id iB397uBG008204 for ; Fri, 3 Dec 2004 01:08:04 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: AcTYb/LRbQj3TkmGRYmAuPH1kn91gAAm3MZA X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-IBIS-MailScanner-Information: Please contact the ISP for more information X-IBIS-MailScanner: Found to be clean X-MailScanner-From: manis@net-o2.com Message-ID: <200412030908.iB397uBG008204@mail2.webindia.com> Date: Fri, 3 Dec 2004 14:25:23 +0530 Reply-To: Mailing List Sender: Mailing List From: Manikantan Srinivasan Organization: Net-O2 Technologies Subject: Clarification related to Flooding an LSA by DR Other on its received interface To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <200412021236.HAA09175@ietf.org> Precedence: list Content-Transfer-Encoding: 7bit Hello Good day to you. I have the following doubt/question. As per Sec 13.3 Bullet 3 (Page 150) RFC 2328, (3) If the new LSA was received on this interface, and it was received from either the Designated Router or the Backup Designated Router, chances are that all the neighbors have received the LSA already. Therefore, examine the next interface. I understand, when a DR other (Router 1) receives an LSA from a DR (Router 2), Router 1 will skip flooding back the received LSA back in the received interface. 1) Is this a "SHOULD" condition, i.e DR Other SHOULD not flood the LSA back? Or 2) can (DR Other) MAY flood the LSA over the received interface? If so what should be the destination address? 3) I notice few (atleast 2) implementations (when the DUT is DR Other), the LSA received from DR is flooded back on the received interface, as a unicast packet addressed to BDR. Is this a valid condition/implementation? IS this behavior a "SHOULD" condition? Thanks in advance With best regards Mani From owner-ospf@PEACH.EASE.LSOFT.COM Fri Dec 3 09:42:21 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id JAA10355 for ; Fri, 3 Dec 2004 09:42:16 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <5.00EFACDA@cherry.ease.lsoft.com>; Fri, 3 Dec 2004 9:41:58 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47832743 for OSPF@PEACH.EASE.LSOFT.COM; Fri, 3 Dec 2004 09:41:56 -0500 Received: from 47.129.242.57 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Fri, 3 Dec 2004 09:41:56 -0400 Received: from zrtpd0j7.us.nortel.com (zrtpd0j7.us.nortel.com [47.140.203.25]) by zcars04f.nortelnetworks.com (Switch-2.2.6/Switch-2.2.0) with ESMTP id iB3EfrO19075 for ; Fri, 3 Dec 2004 09:41:53 -0500 (EST) Received: by zrtpd0j7.us.nortel.com with Internet Mail Service (5.5.2653.19) id ; Fri, 3 Dec 2004 09:41:49 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C4D946.359B28C4" Message-ID: Date: Fri, 3 Dec 2004 09:41:43 -0500 Reply-To: Mailing List Sender: Mailing List From: Andrew Smith Subject: Re: Number of Routes and network stability To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C4D946.359B28C4 Content-Type: text/plain; charset="iso-8859-1" X-MIME-Autoconverted: from 8bit to quoted-printable by zcars04f.nortelnetworks.com id iB3EfrO19075 Content-Transfer-Encoding: quoted-printable Mitchell Erblich, I will not disagree with your statements. I believe you are correct in th= ose assumptions.=20 However, I am not talking about maximizing a single router's OSPF implementation so that it performs to the utmost efficiency. I am talking about a guideline to designing an entire network and compensating for reality from day to day. If you design a network around the maximums of o= ne particular box then you will find yourself in trouble when an issue occur= s. Especially when other factors almost always exist such as other routing protocols (BGP) or Multilink PPP sessions which can be processor intensiv= e. Engineering a network requires an allowance for the unknown. For instance= , a router developing a memory leak on buffers when it is getting pummeled by= a virus like the Nachi worm. I have seen it happen and the affect can be detrimental to say the least. I have cleaned up messes not of my own design as I am sure you have had t= o do as well. I give my advice hoping others can avoid the issues I have se= en before. Andrew Smith -----Original Message----- From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On Behalf Of Erblic= hs Sent: Thursday, December 02, 2004 9:49 PM To: OSPF@PEACH.EASE.LSOFT.COM Subject: Re: Number of Routes and network stability Andrew Smith, I don't think I agree with 90% of this. Available memory has to do with the max size of the LSDB, siumultaneous rexmit queues, etc, THAN the max number of routers supported in a area. Assuming that enough memory is available, link-stability and dead-router interval are more important than CPU capability wrt network stability. Next comes with the number & sizing of input queues, link-speed, and network topology. If the number of hellos and OSPF control pkts overload a CPU, then I hate to see the SPF timeframes, or what would happen if a large number of pkts are targeted to the router. If one says that they can't handle close to 3000 simultaneous links with other routers in a area, then IMO, they have a few issues with their code. I am NOT stating that 3000 simultaneous full adjs can be formed. But if you are dropping adjs because their are too many routers in the area and you thus are dropping (or delaing the processing of) hellos, then their is something wrong with the code or hardware. Support for a large number of routers within a area more has to do with IMO, the ability to decrease the hello interval and hello multiplier and still not drop adjs. Secondly, each router then COULD support fewer links and a failed router would have less of a topology effect. Mitchell Erblich ----------------- > Andrew Smith wrote: > > The recommendation for number of routers per area is usually derived=20 > by considering the amount of processor power and memory available to=20 > the routers in an area. Usually you consider the lowest common=20 > denominator. This means the smallest router (the router with the=20 > fewest resources) limits the size of the area. > > A good rule of thumb is no more than 100 routers per area. If you try=20 > to keep an initial design to 50-70 routers that usually allows room to=20 > grow and recover from a network crisis. > > The vendors that say they can do 3000 routers per area are giving a=20 > scalability number for that box. This particular router can achieve=20 > 3000 routers per area "under the proper circumstances". This is good=20 > to know for how much the box can take, not how high to scale your OSPF=20 > areas. > > Regards, > Andy Smith > > -----Original Message----- > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On Behalf Of=20 > Jing Shen > Sent: Thursday, December 02, 2004 4:46 AM > To: OSPF@PEACH.EASE.LSOFT.COM > Subject: Number of Routes and network stability > > Hi, > > Some vendors recommended that number of routers within > one OSPF area should not exceed 50, some others > recommended number of routes within one area should > not exceed 3000. > > To my understanding, OSPF stability is directly > related to link stability, radius of an OSPF area and > OSPF implementation( router hardware, methodology of > link status processing). But, is there any research > done on this topic? or how are those recommendation > derived ? > > thanks > > Jing Shen > > _________________________________________________________ > Do You Yahoo!? > =D7=A2=B2=E1=CA=C0=BD=E7=D2=BB=C1=F7=C6=B7=D6=CA=B5=C4=D1=C5=BB=A2=C3=E2= =B7=D1=B5=E7=D3=CA=20 > http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/ ------_=_NextPart_001_01C4D946.359B28C4 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable RE: Number of Routes and network stability

Mitchell Erblich,
I will not disagree with your statements. I believe = you are correct in those assumptions.

However, I am not talking about maximizing a single = router's OSPF implementation so that it performs to the utmost = efficiency. I am talking about a guideline to designing an entire = network and compensating for reality from day to day. If you design a = network around the maximums of one particular box then you will find = yourself in trouble when an issue occurs. Especially when other factors = almost always exist such as other routing protocols (BGP) or Multilink = PPP sessions which can be processor intensive.

Engineering a network requires an allowance for the = unknown. For instance, a router developing a memory leak on buffers = when it is getting pummeled by a virus like the Nachi worm. I have seen = it happen and the affect can be detrimental to say the = least.

I have cleaned up messes not of my own design as I am = sure you have had to do as well. I give my advice hoping others can = avoid the issues I have seen before.

Andrew Smith

-----Original Message-----
From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.C= OM] On Behalf Of Erblichs
Sent: Thursday, December 02, 2004 9:49 PM
To: OSPF@PEACH.EASE.LSOFT.COM
Subject: Re: Number of Routes and network = stability


Andrew Smith,

        I don't = think I agree with 90% of this.

        Available = memory has to do with the max size of
        the LSDB, = siumultaneous rexmit queues, etc, THAN
        the max = number of routers supported in a area.

        Assuming = that enough memory is available, link-stability
        and = dead-router interval are more important than CPU
        = capability wrt network stability. Next comes with the
        number = & sizing of input queues, link-speed, and network
        = topology.

        If the = number of hellos and OSPF control pkts
        overload = a CPU, then I hate to see the SPF timeframes,
        or what = would happen if a large number of pkts
        are = targeted to the router.

        If one = says that they can't handle close to 3000
        = simultaneous links with other routers in a area,
        then IMO, = they have a few issues with their code.

        I am NOT = stating that 3000 simultaneous full adjs can
        be = formed. But if you are dropping adjs because their
        are too = many routers in the area and you thus are
        dropping = (or delaing the processing of) hellos, then
        their is = something wrong with the code or hardware.

        Support = for a large number of routers within a area
        more has = to do with IMO, the ability to decrease the
        hello = interval and hello multiplier and still not drop
        adjs. = Secondly, each router then COULD support fewer
        links and = a failed router would have less of a topology
        = effect.

        Mitchell = Erblich
        = -----------------

> Andrew Smith wrote:
>
> The recommendation for number of routers per = area is usually derived
> by considering the amount of processor power = and memory available to
> the routers in an area. Usually you consider = the lowest common
> denominator. This means the smallest router = (the router with the
> fewest resources) limits the size of the = area.
>
> A good rule of thumb is no more than 100 = routers per area. If you try
> to keep an initial design to 50-70 routers that = usually allows room to
> grow and recover from a network crisis.
>
> The vendors that say they can do 3000 routers = per area are giving a
> scalability number for that box. This = particular router can achieve
> 3000 routers per area "under the proper = circumstances". This is good
> to know for how much the box can take, not how = high to scale your OSPF
> areas.
>
> Regards,
> Andy Smith
>
> -----Original Message-----
> From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.C= OM] On Behalf Of
> Jing Shen
> Sent: Thursday, December 02, 2004 4:46 = AM
> To: OSPF@PEACH.EASE.LSOFT.COM
> Subject: Number of Routes and network = stability
>
> Hi,
>
> Some vendors recommended that number of routers = within
> one OSPF area should not exceed 50, some = others
> recommended  number of routes within one = area should
> not exceed 3000.
>
> To my understanding, OSPF stability is = directly
> related to link stability, radius of an OSPF = area and
> OSPF implementation( router hardware, = methodology of
> link status processing). But, is there any = research
> done on this topic? or how are those = recommendation
> derived ?
>
> thanks
>
> Jing Shen
>
> = _________________________________________________________
> Do You Yahoo!?
> = =D7=A2=B2=E1=CA=C0=BD=E7=D2=BB=C1=F7=C6=B7=D6=CA=B5=C4=D1=C5=BB=A2=C3=E2= =B7=D1=B5=E7=D3=CA
> http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.= yahoo.com/

------_=_NextPart_001_01C4D946.359B28C4-- From owner-ospf@PEACH.EASE.LSOFT.COM Fri Dec 3 20:24:33 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id UAA27644 for ; Fri, 3 Dec 2004 20:24:32 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <5.00EFB72B@cherry.ease.lsoft.com>; Fri, 3 Dec 2004 20:24:31 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47891734 for OSPF@PEACH.EASE.LSOFT.COM; Fri, 3 Dec 2004 20:24:29 -0500 Received: from 64.233.184.202 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Fri, 3 Dec 2004 20:14:29 -0400 Received: by wproxy.gmail.com with SMTP id 50so64938wri for ; Fri, 03 Dec 2004 17:14:30 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:references; b=VpyzayBhvx/XU+h5YhL05omj0G/ue+ZekQ4AK4EV2RQCFRKfKINTEqzYYbffhNGR5DWWEPdXZ0wZz+K9RDCDdM/L1+XLTmhw/N8n/i9MkuOiWU1YPCHLxeTCHzzaWF0nL+CJ8cn1WOvY9KDVjiz0kVNd9LGuwZ4niyzrceyO+88= Received: by 10.54.23.65 with SMTP id 65mr72150wrw; Fri, 03 Dec 2004 17:14:29 -0800 (PST) Received: by 10.54.41.18 with HTTP; Fri, 3 Dec 2004 17:14:29 -0800 (PST) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable References: <20041202094605.47235.qmail@web15408.mail.cnb.yahoo.com> Message-ID: <8b7d2e17041203171454d6a8b0@mail.gmail.com> Date: Fri, 3 Dec 2004 17:14:29 -0800 Reply-To: Mailing List Sender: Mailing List From: Scott Whyte Subject: Re: Number of Routes and network stability To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <20041202094605.47235.qmail@web15408.mail.cnb.yahoo.com> Precedence: list Content-Transfer-Encoding: quoted-printable On Thu, 2 Dec 2004 17:46:05 +0800, Jing Shen wrote= : > Hi, >=20 > Some vendors recommended that number of routers within > one OSPF area should not exceed 50, some others > recommended number of routes within one area should > not exceed 3000. >=20 > To my understanding, OSPF stability is directly > related to link stability, radius of an OSPF area and > OSPF implementation( router hardware, methodology of > link status processing). But, is there any research > done on this topic? or how are those recommendation > derived ? The number 50 was pulled out of thin air. Its also been deprecated for quite some time. -Scott >=20 > thanks >=20 > Jing Shen >=20 > _________________________________________________________ > Do You Yahoo!? > =E6=B3=A8=E5=86=8C=E4=B8=96=E7=95=8C=E4=B8=80=E6=B5=81=E5=93=81=E8=B4=A8= =E7=9A=84=E9=9B=85=E8=99=8E=E5=85=8D=E8=B4=B9=E7=94=B5=E9=82=AE > http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/ > From owner-ospf@PEACH.EASE.LSOFT.COM Sat Dec 4 07:02:36 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id HAA22874 for ; Sat, 4 Dec 2004 07:02:36 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <8.00EFC1FF@cherry.ease.lsoft.com>; Sat, 4 Dec 2004 7:02:37 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47972206 for OSPF@PEACH.EASE.LSOFT.COM; Sat, 4 Dec 2004 07:02:33 -0500 Received: from 203.197.124.190 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Sat, 4 Dec 2004 07:02:32 -0400 Received: from NUTMEG ([192.168.10.140]) by alumnux.com (8.9.3/8.9.3) with SMTP id RAA19208 for ; Sat, 4 Dec 2004 17:18:00 +0530 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0010_01C4DA28.1582B0D0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4942.400 Importance: Normal Message-ID: <000f01c4d9f9$fbca74d0$8c0aa8c0@NUTMEG> Date: Sat, 4 Dec 2004 17:38:35 +0530 Reply-To: Mailing List Sender: Mailing List From: Joseph Placid Subject: Stub link To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list This is a multi-part message in MIME format. ------=_NextPart_000_0010_01C4DA28.1582B0D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Hi, In the given Scenario, how would R1 advertise the Link between R1 and R2. Would it advertise it as a stub link (Link Type 3) in its Router LSA ? Thanks in advance, Joseph LAN1 | | R1| ------|R2| | LAN2 ------=_NextPart_000_0010_01C4DA28.1582B0D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi,
 
In the = given=20 Scenario, how would R1 advertise the Link between R1 and R2. Would it = advertise=20 it as a stub link (Link Type 3) in its Router LSA ?
 
Thanks = in=20 advance,
Joseph
 
 
       &nbs= p;  =20 LAN1
       &nbs= p;        =20 |
| R1|=20 ------|R2|
       &nbs= p;        =20 |
       &nbs= p;   LAN2
 
 
 
 
 
 
 
 
 
------=_NextPart_000_0010_01C4DA28.1582B0D0-- From owner-ospf@PEACH.EASE.LSOFT.COM Sun Dec 5 14:40:22 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id OAA02179 for ; Sun, 5 Dec 2004 14:40:21 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <18.00EFD8C1@cherry.ease.lsoft.com>; 5 Dec 2004 14:40:20 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 48122549 for OSPF@PEACH.EASE.LSOFT.COM; Sun, 5 Dec 2004 14:40:16 -0500 Received: from 69.25.242.10 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Sun, 5 Dec 2004 14:40:16 -0400 Received: from CallSciences (unverified [172.21.6.71]) by ucmmail.com (Rockliffe SMTPRA 5.3.11) with SMTP id ; Sun, 5 Dec 2004 14:40:18 -0500 Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="PART_BOUNDARY_QKSYAYGVWX" Message-ID: Date: Sun, 5 Dec 2004 14:40:16 -0500 Reply-To: Mailing List Sender: Mailing List From: Sean Andersen Subject: Re: Stub link To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list --PART_BOUNDARY_QKSYAYGVWX Content-Type: text/plain; not specified Joseph, A good place to start is RFC 2328 section 12.4.1 page 126 -- 129 (especially the last page). Hope that helps, Sean -----Original Message----- From: Joseph Placid Sent: Sat, 4 Dec 2004 17:38:35 +0530 To: OSPF@PEACH.EASE.LSOFT.COM Subject: Stub link Hi, In the given Scenario, how would R1 advertise the Link between R1 and R2. Would it advertise it as a stub link (Link Type 3) in its Router LSA ? Thanks in advance, Joseph LAN1 | | R1| ------|R2| | LAN2 --PART_BOUNDARY_QKSYAYGVWX Content-Type: text/html; name="2004125143710.html" Content-Disposition: filename="2004125143710.html" Content-MD5: WRlFkA4fwMWu29svj+hYmQ== Content-Transfer-Encoding: base64 //48ACEARABPAEMAVABZAFAARQAgAEgAVABNAEwAIABQAFUAQgBMAEkAQwAgACIALQAvAC8A VwAzAEMALwAvAEQAVABEACAASABUAE0ATAAgADQALgAwACAAVAByAGEAbgBzAGkAdABpAG8A bgBhAGwALwAvAEUATgAiAD4ADQAKADwASABUAE0ATAA+ADwASABFAEEARAA+AA0ACgA8AE0A RQBUAEEAIABIAFQAVABQAC0ARQBRAFUASQBWAD0AIgBDAG8AbgB0AGUAbgB0AC0AVAB5AHAA ZQAiACAAQwBPAE4AVABFAE4AVAA9ACIAdABlAHgAdAAvAGgAdABtAGwAOwAgAGMAaABhAHIA cwBlAHQAPQBpAHMAbwAtADgAOAA1ADkALQAxACIAPgANAAoADQAKAA0ACgA8AE0ARQBUAEEA IABjAG8AbgB0AGUAbgB0AD0AIgBNAFMASABUAE0ATAAgADUALgAwADAALgAzADgAMgAxAC4A MgA4ADAAMAAiACAAbgBhAG0AZQA9AEcARQBOAEUAUgBBAFQATwBSAD4APAAvAEgARQBBAEQA PgANAAoAPABCAE8ARABZAD4ADQAKADwARABJAFYAPgA8AEYATwBOAFQAIABmAGEAYwBlAD0A QQByAGkAYQBsACAAcwBpAHoAZQA9ADIAPgA8AFMAUABBAE4AIAANAAoAYwBsAGEAcwBzAD0A 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Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 48149135 for OSPF@PEACH.EASE.LSOFT.COM; Sun, 5 Dec 2004 22:37:44 -0500 Received: from 64.102.122.149 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Sun, 5 Dec 2004 22:37:44 -0400 Received: from rtp-core-2.cisco.com (64.102.124.13) by rtp-iport-2.cisco.com with ESMTP; 05 Dec 2004 22:37:48 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-2.cisco.com (8.12.10/8.12.6) with ESMTP id iB63biA6021006 for ; Sun, 5 Dec 2004 22:37:45 -0500 (EST) Received: from [192.168.2.6] (rtp-vpn3-495.cisco.com [10.82.217.241]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BDU39221; Sun, 5 Dec 2004 19:37:43 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <200412030908.iB397uBG008204@mail2.webindia.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41B3D407.1010102@cisco.com> Date: Sun, 5 Dec 2004 22:37:43 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: Clarification related to Flooding an LSA by DR Other on its received interface To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <200412030908.iB397uBG008204@mail2.webindia.com> Precedence: list Content-Transfer-Encoding: 7bit Manikantan Srinivasan wrote: >Hello > >Good day to you. > >I have the following doubt/question. > >As per Sec 13.3 Bullet 3 (Page 150) RFC 2328, > > (3) If the new LSA was received on this interface, and it was > received from either the Designated Router or the Backup > Designated Router, chances are that all the neighbors have > received the LSA already. Therefore, examine the next > interface. > >I understand, when a DR other (Router 1) receives an LSA from a DR (Router >2), Router 1 will skip flooding back the received LSA back in the received >interface. > >1) Is this a "SHOULD" condition, i.e DR Other SHOULD not flood the LSA back? >Or > >2) can (DR Other) MAY flood the LSA over the received interface? If so what >should be the destination address? > >3) I notice few (atleast 2) implementations (when the DUT is DR Other), the >LSA received from DR is flooded back on the received interface, as a unicast >packet addressed to BDR. Is this a valid condition/implementation? IS this >behavior a "SHOULD" condition? > > Hi Mani, I've re-read RFC 2328 and unfortunately the broadcast network flooding is complex and not all that clear. What I suspect is happening is that the DR-other router is adding the new LSA to its retransmission list and retransmitting when the timer expires. Based on RFC 2328, this is correct. However, section 13.5 is somewhat unclear on whether or not the BDR should send a delayed acknowledgement. I think that it should since the BDR is NOT the router that re-flooded the LSA out the receiving interface (as determined in section 13, step 5b) - even though the BDR knows that the DR is reflooding it out the receiving interface. Consequently, the first thing I would check before suspecting two separate DR-other implementations is whether or not the BDR is sending the delayed acknowledgement. If it is not, then it is the implementation that is culpable. Other opinions are welcome. Thanks, Acee >Thanks in advance > >With best regards >Mani > > > From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 7 02:17:32 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id CAA25459 for ; Tue, 7 Dec 2004 02:17:31 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <9.00F00139@cherry.ease.lsoft.com>; Tue, 7 Dec 2004 2:17:30 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47936138 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 7 Dec 2004 02:17:29 -0500 Received: from 203.199.83.246 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 7 Dec 2004 02:17:28 -0500 Received: (qmail 25822 invoked by uid 510); 7 Dec 2004 07:18:20 -0000 Received: from unknown (203.126.136.220) by rediffmail.com via HTTP; 07 dec 2004 07:18:20 -0000 MIME-Version: 1.0 Content-type: multipart/alternative; boundary="Next_1102403900---0-203.199.83.246-25814" Message-ID: <20041207071820.25821.qmail@webmail35.rediffmail.com> Date: Tue, 7 Dec 2004 07:18:20 -0000 Reply-To: Mailing List Sender: Mailing List From: Vivek Dubey Subject: draft-ietf-ospf-cap-04.txt To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list This is a multipart mime message --Next_1102403900---0-203.199.83.246-25814 Content-type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi,=0ASection 2.3:=0Adraft>TLV flooding scope rules will be specified on a = per-TLV basis =A0=0Adraft>If a type 11 opaque LSA is chosen, the originatin= g router should =0A also advertise type 10 LSA(s) into any attached NS= SA/stub area=0A=0Avivek) If scope of TLV is defined to be AS (Type 11), why= should, the =0A originating router advertise type 10 LSA(s) into any= =0A attached NSSA/stub area ? Idea seems to get the capabilities=0A = advertised to NSSA/STUB neighbors of originating router. But =0A = what about NSSA/STUB areas attached not to "originating" =0A router= s?? =0A=0Adraft>An OSPF router MAY advertise different capabilities when bo= th =0A NSSA/stub area type 10 LSA(s) and an AS scoped type 11 opaque = =0A LSA is advertised.=0Avivek> Capabilities here should map to differ= ent TLV's ??=0A=0AThanks=0AVivek=0A --Next_1102403900---0-203.199.83.246-25814 Content-type: text/html; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable

=0AHi,
=0ASection 2.3:
=0Adraft>TLV flooding scope rules will b= e specified on a per-TLV basis 
=0Adraft>If a type 11 opaque LS= A is chosen, the originating router should
=0A      also= advertise type 10 LSA(s) into any attached NSSA/stub area
=0A
=0Aviv= ek) If scope of TLV is defined to be AS (Type 11), why should, the
=0A&= nbsp;     originating router advertise type 10 LSA(s) into any <= BR>=0A      attached NSSA/stub area ? Idea seems to get the= capabilities
=0A      advertised to NSSA/STUB neighbors= of originating router. But
=0A      what about NSSA/ST= UB areas attached not to "originating"
=0A     = ; routers??
=0A
=0Adraft>An OSPF router MAY advertise different = capabilities when both
=0A      NSSA/stub area type 10 L= SA(s) and an AS scoped type 11 opaque
=0A      LSA is ad= vertised.
=0Avivek> Capabilities here should map to different TLV's ?= ?
=0A
=0AThanks
=0AVivek
=0A=0A

=0A

=0A=0A --Next_1102403900---0-203.199.83.246-25814-- From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 7 03:54:42 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id DAA02743 for ; Tue, 7 Dec 2004 03:54:41 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <12.00F0029C@cherry.ease.lsoft.com>; Tue, 7 Dec 2004 3:54:41 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 47940268 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 7 Dec 2004 03:54:40 -0500 Received: from 144.254.15.119 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 7 Dec 2004 03:54:32 -0500 Received: from cisco.com (ppsenak-isdn-home.cisco.com [10.49.2.218]) by strange-brew.cisco.com (8.11.7p1+Sun/8.8.8) with ESMTP id iB78sT122303 for ; Tue, 7 Dec 2004 09:54:29 +0100 (CET) User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.0.2) Gecko/20030208 Netscape/7 X-Accept-Language: en-us, en MIME-Version: 1.0 References: <20041207071820.25821.qmail@webmail35.rediffmail.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41B56FC4.7050202@cisco.com> Date: Tue, 7 Dec 2004 09:54:28 +0100 Reply-To: Mailing List Sender: Mailing List From: Peter Psenak Subject: Re: draft-ietf-ospf-cap-04.txt To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: 7bit Vivek, Vivek Dubey wrote: > Hi, > Section 2.3: > draft>TLV flooding scope rules will be specified on a per-TLV basis > draft>If a type 11 opaque LSA is chosen, the originating router should > also advertise type 10 LSA(s) into any attached NSSA/stub area > > vivek) If scope of TLV is defined to be AS (Type 11), why should, the > originating router advertise type 10 LSA(s) into any > attached NSSA/stub area ? Idea seems to get the capabilities > advertised to NSSA/STUB neighbors of originating router. But > what about NSSA/STUB areas attached not to "originating" > routers?? an analogy is when you have an ABR connected to backbone area and NSSA area and you redistribute routes from some external source. ABR will generate Type-5 external LSA, plus it can be configured to advertise Type-7 LSA to the NSSA area for the same prefix. If you have another ASBR somewhere in backbone area, Type-5 LSAs it generates will not get propagated to NSSA area. > > draft>An OSPF router MAY advertise different capabilities when both > NSSA/stub area type 10 LSA(s) and an AS scoped type 11 opaque > LSA is advertised. > vivek> Capabilities here should map to different TLV's ?? I guess it can be different TLVs or different content in the same TLV. Peter > > Thanks > Vivek > > > > From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 7 12:33:26 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id MAA27749 for ; Tue, 7 Dec 2004 12:33:24 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <1.00F00D1F@cherry.ease.lsoft.com>; Tue, 7 Dec 2004 12:33:23 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 48018681 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 7 Dec 2004 12:33:20 -0500 Received: from 203.199.83.148 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 7 Dec 2004 12:33:19 -0500 Received: (qmail 19982 invoked by uid 510); 7 Dec 2004 17:34:11 -0000 Received: from unknown (203.126.136.220) by rediffmail.com via HTTP; 07 dec 2004 17:34:11 -0000 MIME-Version: 1.0 Content-type: multipart/alternative; boundary="Next_1102440851---0-203.199.83.148-19949" Message-ID: <20041207173411.19981.qmail@webmail26.rediffmail.com> Date: Tue, 7 Dec 2004 17:34:11 -0000 Reply-To: Mailing List Sender: Mailing List From: Vivek Dubey Subject: Re: draft-ietf-ospf-cap-04.txt To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list This is a multipart mime message --Next_1102440851---0-203.199.83.148-19949 Content-type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Peter,=0A=0A1) In case of ABR analogy, the information was directly relevan= t to=0A OSPF routing and even than it was provided as configuration=A0opt= ion, =0A not a "should" condition.=0A=0A Here, OSPF RI Opaque LSA is us= ed for both:=0A a) Advertising router's OSPF capabilities (TLV 1)=0A b)= Capablities Opaque to OSPF (Any future TLVs defined)=0A=0A And since flo= oding scope is per TLV and depends on local policy,=0A there should be no= dependency on Type's of area configured at OSPF =0A level. =0A=0A2) =0Ad= raft>An OSPF router MAY advertise different capabilities when both=0A = NSSA/stub area type 10 LSA(s) and an AS scoped type 11 opaque=0A LSA= is advertised.=0Avivek> Capabilities here should map to different TLV's ??= =0A=0APeter>I guess it can be different TLVs or different content in the sa= me TLV.=0A=0Avivek> Different content in same TLV, advertised in different = scoped=0A LSAs (Type 10 and Type 11). Doesnt seems a good idea to me.= =0A Any possible scenarios?=0A=0AThanks=0AVivek=0A=0A=0A=0A=0A=0AOn T= ue, 07 Dec 2004 Peter Psenak wrote :=0A>Vivek,=0A>=0A>Vivek Dubey wrote:=0A= >>Hi,=0A>>Section 2.3:=0A>>draft>TLV flooding scope rules will be specified= on a per-TLV basis=0A>>draft>If a type 11 opaque LSA is chosen, the origin= ating router should=0A>> also advertise type 10 LSA(s) into any attac= hed NSSA/stub area=0A>>=0A>>vivek) If scope of TLV is defined to be AS (Typ= e 11), why should, the=0A>> originating router advertise type 10 LSA(= s) into any=0A>> attached NSSA/stub area ? Idea seems to get the capa= bilities=0A>> advertised to NSSA/STUB neighbors of originating router= . But=0A>> what about NSSA/STUB areas attached not to "originating"= =0A>> routers??=0A>=0A>an analogy is when you have an ABR connected t= o backbone area and NSSA=0A>area and you redistribute routes from some exte= rnal source. ABR will=0A>generate Type-5 external LSA, plus it can be confi= gured to advertise=0A>Type-7 LSA to the NSSA area for the same prefix.=0A>I= f you have another ASBR somewhere in backbone area, Type-5 LSAs it=0A>gener= ates will not get propagated to NSSA area.=0A>=0A>>=0A>>draft>An OSPF route= r MAY advertise different capabilities when both=0A>> NSSA/stub area = type 10 LSA(s) and an AS scoped type 11 opaque=0A>> LSA is advertised= .=0A>>vivek> Capabilities here should map to different TLV's ??=0A>=0A>I gu= ess it can be different TLVs or different content in the same TLV.=0A>=0A>P= eter=0A>=0A>>=0A>>Thanks=0A>>Vivek=0A>>=0A>>=0A>>=0A>>=0A --Next_1102440851---0-203.199.83.148-19949 Content-type: text/html; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable

=0APeter,
=0A
=0A1) In case of ABR analogy, the information was di= rectly relevant to
=0A  OSPF routing and even than it was provided= as configuration=A0option,
=0A  not a "should" conditi= on.
=0A
=0A  Here, OSPF RI Opaque LSA is used for both:
=0A&= nbsp; a) Advertising router's OSPF capabilities (TLV 1)
=0A  b) C= apablities Opaque to OSPF (Any future TLVs defined)
=0A
=0A  An= d since flooding scope is per TLV and depends on local policy,
=0A = there should be no dependency on Type's of area configured at OSPF
= =0A  level.
=0A
=0A2)
=0Adraft>An OSPF router MAY adver= tise different capabilities when both
=0A      NSSA/stub= area type 10 LSA(s) and an AS scoped type 11 opaque
=0A    &n= bsp; LSA is advertised.
=0Avivek> Capabilities here should map to di= fferent TLV's ??
=0A
=0APeter>I guess it can be different TLVs or = different content in the same TLV.
=0A
=0Avivek> Different content= in same TLV, advertised in different scoped
=0A      LS= As (Type 10 and Type 11). Doesnt seems a good idea to me.
=0A  &nbs= p;   Any possible scenarios?
=0A
=0AThanks
=0AVivek
=0A=0A
=0A
=0A
=0A
=0AOn Tue, 07 Dec 2004 Peter Psenak wrote :=0A>Vivek,
=0A>
=0A>Vivek Dubey wrote:
=0A>>Hi,=0A>>Section 2.3:
=0A>>draft>TLV flooding scope rules w= ill be specified on a per-TLV basis
=0A>>draft>If a type 11 opa= que LSA is chosen, the originating router should
=0A>>   = ;   also advertise type 10 LSA(s) into any attached NSSA/stub area=0A>>
=0A>>vivek) If scope of TLV is defined to be AS (Type= 11), why should, the
=0A>>      originating route= r advertise type 10 LSA(s) into any
=0A>>      att= ached NSSA/stub area ? Idea seems to get the capabilities
=0A>>&nb= sp;     advertised to NSSA/STUB neighbors of originating router.= But
=0A>>      what about NSSA/STUB areas attache= d not to "originating"
=0A>>      router= s??
=0A>
=0A>an analogy is when you have an ABR connected to ba= ckbone area and NSSA
=0A>area and you redistribute routes from some e= xternal source. ABR will
=0A>generate Type-5 external LSA, plus it ca= n be configured to advertise
=0A>Type-7 LSA to the NSSA area for the = same prefix.
=0A>If you have another ASBR somewhere in backbone area,= Type-5 LSAs it
=0A>generates will not get propagated to NSSA area.=0A>
=0A>>
=0A>>draft>An OSPF router MAY advertis= e different capabilities when both
=0A>>      NSSA= /stub area type 10 LSA(s) and an AS scoped type 11 opaque
=0A>>&nb= sp;     LSA is advertised.
=0A>>vivek> Capabilities = here should map to different TLV's ??
=0A>
=0A>I guess it can b= e different TLVs or different content in the same TLV.
=0A>
=0A>= ;Peter
=0A>
=0A>>
=0A>>Thanks
=0A>>Vivek=0A>>
=0A>>
=0A>>
=0A>><http://client= s.rediff.com/signature/track_sig.asp>
=0A=0A

=0A

=0A=0A --Next_1102440851---0-203.199.83.148-19949-- From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 7 17:17:01 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id RAA05991 for ; Tue, 7 Dec 2004 17:17:01 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <14.00F0130F@cherry.ease.lsoft.com>; Tue, 7 Dec 2004 17:17:01 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 48047631 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 7 Dec 2004 17:16:59 -0500 Received: from 64.102.122.149 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 7 Dec 2004 17:16:59 -0500 Received: from rtp-core-2.cisco.com (64.102.124.13) by rtp-iport-2.cisco.com with ESMTP; 07 Dec 2004 17:16:59 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-2.cisco.com (8.12.10/8.12.6) with ESMTP id iB7MGvA6010743; Tue, 7 Dec 2004 17:16:57 -0500 (EST) Received: from [64.102.48.185] (dhcp-64-102-48-185.cisco.com [64.102.48.185]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BDV78421; Tue, 7 Dec 2004 14:16:56 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <20041207173411.19981.qmail@webmail26.rediffmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41B62BD7.7090305@cisco.com> Date: Tue, 7 Dec 2004 17:16:55 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: draft-ietf-ospf-cap-04.txt Comments: To: Jean Philippe Vasseur To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <20041207173411.19981.qmail@webmail26.rediffmail.com> Precedence: list Content-Transfer-Encoding: 7bit Hi Vivek, Vivek Dubey wrote: > Peter, > > 1) In case of ABR analogy, the information was directly relevant to > OSPF routing and even than it was provided as configuration option, > not a "should" condition. > I think the configuration option is implementation specific. Although it is not covered explicitly I think RFC 3103 implies an ABR will redistribute into both attached NSSAs and regular areas. > > Here, OSPF RI Opaque LSA is used for both: > a) Advertising router's OSPF capabilities (TLV 1) > b) Capablities Opaque to OSPF (Any future TLVs defined) > > And since flooding scope is per TLV and depends on local policy, > there should be no dependency on Type's of area configured at OSPF > level. > > 2) > draft>An OSPF router MAY advertise different capabilities when both > NSSA/stub area type 10 LSA(s) and an AS scoped type 11 opaque > LSA is advertised. > vivek> Capabilities here should map to different TLV's ?? > > Peter>I guess it can be different TLVs or different content in the > same TLV. > > vivek> Different content in same TLV, advertised in different scoped > LSAs (Type 10 and Type 11). Doesnt seems a good idea to me. > Any possible scenarios? > JP - can you take a shot at this? I seem to remember that you had a scenario in minde. Thanks, Acee > > Thanks > Vivek > > > > > > On Tue, 07 Dec 2004 Peter Psenak wrote : > >Vivek, > > > >Vivek Dubey wrote: > >>Hi, > >>Section 2.3: > >>draft>TLV flooding scope rules will be specified on a per-TLV basis > >>draft>If a type 11 opaque LSA is chosen, the originating router should > >> also advertise type 10 LSA(s) into any attached NSSA/stub area > >> > >>vivek) If scope of TLV is defined to be AS (Type 11), why should, the > >> originating router advertise type 10 LSA(s) into any > >> attached NSSA/stub area ? Idea seems to get the capabilities > >> advertised to NSSA/STUB neighbors of originating router. But > >> what about NSSA/STUB areas attached not to "originating" > >> routers?? > > > >an analogy is when you have an ABR connected to backbone area and NSSA > >area and you redistribute routes from some external source. ABR will > >generate Type-5 external LSA, plus it can be configured to advertise > >Type-7 LSA to the NSSA area for the same prefix. > >If you have another ASBR somewhere in backbone area, Type-5 LSAs it > >generates will not get propagated to NSSA area. > > > >> > >>draft>An OSPF router MAY advertise different capabilities when both > >> NSSA/stub area type 10 LSA(s) and an AS scoped type 11 opaque > >> LSA is advertised. > >>vivek> Capabilities here should map to different TLV's ?? > > > >I guess it can be different TLVs or different content in the same TLV. > > > >Peter > > > >> > >>Thanks > >>Vivek > >> > >> > >> > >> > > > > From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 7 17:25:17 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id RAA06972 for ; Tue, 7 Dec 2004 17:25:17 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <21.00F01407@cherry.ease.lsoft.com>; Tue, 7 Dec 2004 17:25:18 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 48048392 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 7 Dec 2004 17:25:17 -0500 Received: from 171.71.176.72 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 7 Dec 2004 17:25:16 -0500 Received: from sj-core-1.cisco.com (171.71.177.237) by sj-iport-3.cisco.com with ESMTP; 07 Dec 2004 15:30:28 +0000 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from wells.cisco.com (wells.cisco.com [171.71.177.223]) by sj-core-1.cisco.com (8.12.10/8.12.6) with ESMTP id iB7MPBD9011980; Tue, 7 Dec 2004 14:25:11 -0800 (PST) Received: from [24.181.239.125] (che-vpn-cluster-1-55.cisco.com [10.86.240.55]) by wells.cisco.com (8.8.6 (PHNE_14041)/CISCO.SERVER.1.2) with ESMTP id OAA28918; Tue, 7 Dec 2004 14:25:13 -0800 (PST) Mime-Version: 1.0 (Apple Message framework v619) References: <20041207173411.19981.qmail@webmail26.rediffmail.com> <41B62BD7.7090305@cisco.com> Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit X-Mailer: Apple Mail (2.619) Message-ID: Date: Tue, 7 Dec 2004 17:25:18 -0500 Reply-To: Mailing List Sender: Mailing List From: JP Vasseur Subject: Re: draft-ietf-ospf-cap-04.txt Comments: To: Vivek Dubey To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <41B62BD7.7090305@cisco.com> Precedence: list Content-Transfer-Encoding: 7bit Hi Vivek, On Dec 7, 2004, at 5:16 PM, Acee Lindem wrote: > Hi Vivek, > > > Vivek Dubey wrote: > >> Peter, >> >> 1) In case of ABR analogy, the information was directly relevant to >> OSPF routing and even than it was provided as configuration option, >> not a "should" condition. >> > I think the configuration option is implementation specific. Although > it is > not covered explicitly I think RFC 3103 implies an ABR will > redistribute > into both attached NSSAs and regular areas. > > >> >> Here, OSPF RI Opaque LSA is used for both: >> a) Advertising router's OSPF capabilities (TLV 1) >> b) Capablities Opaque to OSPF (Any future TLVs defined) >> >> And since flooding scope is per TLV and depends on local policy, >> there should be no dependency on Type's of area configured at OSPF >> level. >> >> 2) >> draft>An OSPF router MAY advertise different capabilities when both >> NSSA/stub area type 10 LSA(s) and an AS scoped type 11 opaque >> LSA is advertised. >> vivek> Capabilities here should map to different TLV's ?? >> >> Peter>I guess it can be different TLVs or different content in the >> same TLV. >> >> vivek> Different content in same TLV, advertised in different scoped >> LSAs (Type 10 and Type 11). Doesnt seems a good idea to me. >> Any possible scenarios? >> > JP - can you take a shot at this? I seem to remember that you had a > scenario in minde. > Indeed. In the case of TE, there are various cases where a router may want to advertise a capability with different flooding scopes thus two different opaque LSAs. For instance, a router may belong to two different meshes of TE LSPs, one local to its area (RI LSA of Type 10) one across the routing domain (RI LSA of Type 11). The same TLV (automesh) is used, with different contents, carried in different LSA (type 10 and 11). Thanks. JP. > Thanks, > Acee > >> >> Thanks >> Vivek >> >> >> >> >> >> On Tue, 07 Dec 2004 Peter Psenak wrote : >> >Vivek, >> > >> >Vivek Dubey wrote: >> >>Hi, >> >>Section 2.3: >> >>draft>TLV flooding scope rules will be specified on a per-TLV basis >> >>draft>If a type 11 opaque LSA is chosen, the originating router >> should >> >> also advertise type 10 LSA(s) into any attached NSSA/stub area >> >> >> >>vivek) If scope of TLV is defined to be AS (Type 11), why should, >> the >> >> originating router advertise type 10 LSA(s) into any >> >> attached NSSA/stub area ? Idea seems to get the capabilities >> >> advertised to NSSA/STUB neighbors of originating router. But >> >> what about NSSA/STUB areas attached not to "originating" >> >> routers?? >> > >> >an analogy is when you have an ABR connected to backbone area and >> NSSA >> >area and you redistribute routes from some external source. ABR will >> >generate Type-5 external LSA, plus it can be configured to advertise >> >Type-7 LSA to the NSSA area for the same prefix. >> >If you have another ASBR somewhere in backbone area, Type-5 LSAs it >> >generates will not get propagated to NSSA area. >> > >> >> >> >>draft>An OSPF router MAY advertise different capabilities when both >> >> NSSA/stub area type 10 LSA(s) and an AS scoped type 11 opaque >> >> LSA is advertised. >> >>vivek> Capabilities here should map to different TLV's ?? >> > >> >I guess it can be different TLVs or different content in the same >> TLV. >> > >> >Peter >> > >> >> >> >>Thanks >> >>Vivek >> >> >> >> >> >> >> >> >> >> >> >> > From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 8 05:44:47 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id FAA11604 for ; Wed, 8 Dec 2004 05:44:47 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <10.00F02357@cherry.ease.lsoft.com>; Wed, 8 Dec 2004 5:44:47 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 48103479 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 8 Dec 2004 05:44:45 -0500 Received: from 203.197.124.190 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 8 Dec 2004 05:44:44 -0500 Received: from NUTMEG ([192.168.10.140]) by alumnux.com (8.9.3/8.9.3) with SMTP id PAA20921 for ; Wed, 8 Dec 2004 15:59:25 +0530 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0014_01C4DD41.E6205D70" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4942.400 Message-ID: <001301c4dd13$cc682170$8c0aa8c0@NUTMEG> Date: Wed, 8 Dec 2004 16:20:56 +0530 Reply-To: Mailing List Sender: Mailing List From: Joseph Placid Subject: Unknown Opaque type To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list This is a multi-part message in MIME format. ------=_NextPart_000_0014_01C4DD41.E6205D70 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Hi, What should an opaque capable router do if it receives an opaque LSA having an unknown opaque type through flooding? Is this mentioned in RFC 2370? Thanks, Joseph ------=_NextPart_000_0014_01C4DD41.E6205D70 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi,
   =20 What should an opaque capable router do if it receives an = opaque LSA=20 having an unknown opaque type through flooding? Is this mentioned in RFC = 2370?
 
Thanks,
Joseph
------=_NextPart_000_0014_01C4DD41.E6205D70-- From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 8 06:06:20 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id GAA13396 for ; Wed, 8 Dec 2004 06:06:20 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <9.00F0225F@cherry.ease.lsoft.com>; Wed, 8 Dec 2004 6:06:21 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 48103742 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 8 Dec 2004 06:06:19 -0500 Received: from 166.111.8.16 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 8 Dec 2004 05:51:35 -0500 Received: (eyou send program); Wed, 08 Dec 2004 18:46:16 +0800 Received: from unknown (HELO mails.tsinghua.edu.cn) (unknown@127.0.0.1) by 127.0.0.1 with SMTP; Wed, 08 Dec 2004 18:46:16 +0800 X-scanvirus: By Symantec Scan Engine X-scanresult: CLEAN X-Received: tu066089.tsinghua.edu.cn,166.111.66.89,20041208184615 Received: from tu066089.tsinghua.edu.cn (HELO yangyang) (yy01@166.111.66.89) by localhost with SMTP; 8 Dec 2004 10:46:15 -0000 X-mailer: Foxmail 4.2 [cn] Mime-Version: 1.0 Content-Type: text/plain; charset="GB2312" Content-Transfer-Encoding: quoted-printable Message-ID: <302502776.13247@mails.tsinghua.edu.cn> Date: Wed, 8 Dec 2004 18:51:12 +0800 Reply-To: Mailing List Sender: Mailing List From: =?GB2312?Q?=D1=EE=D1=F3?= Organization: =?GB2312?Q?=C7=E5=BB=AA=B4=F3=D1=A7=B5=E7=D7=D3=B9=A4=B3=CC=CF=B5?= Subject: Re: Unknown Opaque type To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: quoted-printable Joseph Placid, I think the LSA should be discarded without further= processing. =09 =3D=3D=3D=3D=3D=3D=3D 2004-12-08 16:20:00 =3D=3D=3D=3D=3D=3D=3D >Hi, > What should an opaque capable router do if it receives an= opaque LSA >having an unknown opaque type through flooding? Is this= mentioned in RFC >2370? > >Thanks, >Joseph =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =09=09=09 Yang =A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1yy01@mails.tsinghua.edu.cn =A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A12004-12-08 ----------------------------------------------------- Yang Yang, Ph.D. Candidate Dept. E.E., Tsinghua Univ., Beijing 100084, P.R.CHINA ----------------------------------------------------- From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 8 06:16:05 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id GAA13967 for ; Wed, 8 Dec 2004 06:16:05 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <6.00F02499@cherry.ease.lsoft.com>; Wed, 8 Dec 2004 6:16:06 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 48122117 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 8 Dec 2004 06:16:05 -0500 Received: from 64.102.122.149 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 8 Dec 2004 06:16:02 -0500 Received: from rtp-core-2.cisco.com (64.102.124.13) by rtp-iport-2.cisco.com with ESMTP; 08 Dec 2004 06:16:03 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-2.cisco.com (8.12.10/8.12.6) with ESMTP id iB8BG0A6002491 for ; Wed, 8 Dec 2004 06:16:01 -0500 (EST) Received: from [192.168.2.6] (rtp-vpn3-48.cisco.com [10.82.216.48]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BDW05798; Wed, 8 Dec 2004 03:15:59 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <302502776.13247@mails.tsinghua.edu.cn> Content-Type: text/plain; charset=GB2312 Content-Transfer-Encoding: 8bit Message-ID: <41B6E26F.6010401@cisco.com> Date: Wed, 8 Dec 2004 06:15:59 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: Unknown Opaque type To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <302502776.13247@mails.tsinghua.edu.cn> Precedence: list Content-Transfer-Encoding: 8bit ÑîÑó wrote: >Joseph Placid, > I think the LSA should be discarded without further processing. > > Yang, Actually it should store it in its database and flood it at the appropriate scope. See section 2.0 of RFC 2370. Hope this helps, Acee > > >======= 2004-12-08 16:20:00 ======= > > > >>Hi, >> What should an opaque capable router do if it receives an opaque LSA >>having an unknown opaque type through flooding? Is this mentioned in RFC >>2370? >> >>Thanks, >>Joseph >> >> > >= = = = = = = = = = = = = = = = = = = = > >Yang >¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡yy01@mails.tsinghua.edu.cn >¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2004-12-08 > >----------------------------------------------------- >Yang Yang, Ph.D. Candidate >Dept. E.E., Tsinghua Univ., Beijing 100084, P.R.CHINA >----------------------------------------------------- > > > From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 8 17:59:45 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id RAA20580 for ; Wed, 8 Dec 2004 17:59:44 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <10.00F03303@cherry.ease.lsoft.com>; Wed, 8 Dec 2004 17:59:44 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 48207824 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 8 Dec 2004 17:59:42 -0500 Received: from 132.177.123.82 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 8 Dec 2004 17:59:42 -0500 Received: from iol.unh.edu (scrappy.iol.unh.edu [132.177.118.198]) by io.iol.unh.edu (8.13.1/8.13.1) with ESMTP id iB8MxcZu004492 for ; Wed, 8 Dec 2004 17:59:38 -0500 User-Agent: Mozilla/5.0 (X11; U; Linux alpha; en-US; rv:0.9.9) Gecko/20020503 X-Accept-Language: en-us, en MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-UNH-IOL-MailScanner-Information: Please contact systems@iol.unh.edu for more information X-UNH-IOL-MailScanner: Found to be clean X-UNH-IOL-MailScanner-From: mcleary@iol.unh.edu Message-ID: <41B787B9.4070104@iol.unh.edu> Date: Wed, 8 Dec 2004 18:01:13 -0500 Reply-To: Mailing List Sender: Mailing List From: Mike Cleary Subject: Sending a Type-7 LSA with forwarding address set to 0.0.0.0 To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: 7bit Hello, I am having a bit of trouble trying to configure a router to send a type 7 lsa with the forwarding address set to 0.0.0.0. I was wondering if anyone could help me with the configuration of this on a cisco(cisco-like) router. The following quote is taken from section 3.2 of RFC 3101 and it leads me to believe that this can be done. (1) If the Type-7 LSA has the P-bit clear, or its forwarding address is set to 0.0.0.0, or the most specific Type-7 address range that subsumes the LSA's network has DoNotAdvertise status, then do nothing with this Type-7 LSA and consider the next one in the list. Otherwise term the LSA as translatable and proceed with step (2). The current configuration steps I take are to enable the router on network 10.10.11.0/24 in area 1 (nssa), give the router a static route 3.3.3.0/24 0.0.0.0, redistribute static on the router. When I issue the static route command it sometimes will allow the command sometimes it rejects it, either way I cannot get the router to redistribute the static route with the forwarding address set to 0.0.0.0. Any Suggestions? Thanks, ~Mike -- ********************************************* Michael Cleary Email: mcleary@iol.unh.edu IPv4 Consortium UNH InterOperability Lab 121 Technology Dr., Suite 2, Durham, NH 03824 Phone: 603-862-3941 http://www.iol.unh.edu ********************************************* From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 8 23:54:47 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id XAA02626 for ; Wed, 8 Dec 2004 23:54:46 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <8.00F03828@cherry.ease.lsoft.com>; Wed, 8 Dec 2004 23:54:47 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 48240460 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 8 Dec 2004 23:54:46 -0500 Received: from 203.197.124.190 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 8 Dec 2004 23:54:45 -0500 Received: from NUTMEG ([192.168.10.140]) by alumnux.com (8.9.3/8.9.3) with SMTP id KAA05665 for ; Thu, 9 Dec 2004 10:09:45 +0530 MIME-Version: 1.0 Content-Type: text/plain; charset="GB2312" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4942.400 Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by alumnux.com id KAA05665 Message-ID: <000401c4ddac$23beb270$8c0aa8c0@NUTMEG> Date: Thu, 9 Dec 2004 10:31:26 +0530 Reply-To: Mailing List Sender: Mailing List From: Joseph Placid Subject: Re: Unknown Opaque type To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <41B6E26F.6010401@cisco.com> Precedence: list Content-Transfer-Encoding: quoted-printable Hi Acee, Will the LSA be acknowledged with an LSAck? Regards, Joseph -----Original Message----- From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM]On Behalf Of Acee Lindem Sent: 08 December 2004 04:46 PM To: OSPF@PEACH.EASE.LSOFT.COM Subject: Re: Unknown Opaque type =D1=EE=D1=F3 wrote: >Joseph Placid, > I think the LSA should be discarded without further processing. > > Yang, Actually it should store it in its database and flood it at the appropriate scope. See section 2.0 of RFC 2370. Hope this helps, Acee > > >=3D=3D=3D=3D=3D=3D=3D 2004-12-08 16:20:00 =3D=3D=3D=3D=3D=3D=3D > > > >>Hi, >> What should an opaque capable router do if it receives an opaque LSA >>having an unknown opaque type through flooding? Is this mentioned in RF= C >>2370? >> >>Thanks, >>Joseph >> >> > >=3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D = =3D =3D > >Yang >=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1yy01@mails.tsinghua.edu.= cn >=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A12004-12-08 > >----------------------------------------------------- >Yang Yang, Ph.D. Candidate >Dept. E.E., Tsinghua Univ., Beijing 100084, P.R.CHINA >----------------------------------------------------- > > > From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 9 07:18:18 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id HAA16579 for ; Thu, 9 Dec 2004 07:18:18 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <13.00F04083@cherry.ease.lsoft.com>; Thu, 9 Dec 2004 7:18:17 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 48308455 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 9 Dec 2004 07:18:10 -0500 Received: from 64.102.122.148 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Thu, 9 Dec 2004 07:18:10 -0500 Received: from rtp-core-2.cisco.com (64.102.124.13) by rtp-iport-1.cisco.com with ESMTP; 09 Dec 2004 07:24:57 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-2.cisco.com (8.12.10/8.12.6) with ESMTP id iB9CI7r7007869 for ; Thu, 9 Dec 2004 07:18:08 -0500 (EST) Received: from [192.168.2.6] (rtp-vpn3-530.cisco.com [10.82.218.21]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BDW85557; Thu, 9 Dec 2004 04:18:06 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <000401c4ddac$23beb270$8c0aa8c0@NUTMEG> Content-Type: text/plain; charset=GB2312 Content-Transfer-Encoding: 8bit Message-ID: <41B8427E.3030600@cisco.com> Date: Thu, 9 Dec 2004 07:18:06 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: Unknown Opaque type To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <000401c4ddac$23beb270$8c0aa8c0@NUTMEG> Precedence: list Content-Transfer-Encoding: 8bit Joseph Placid wrote: >Hi Acee, > Will the LSA be acknowledged with an LSAck? > > Hi Josesph, Yes - probably the main impetus for opaque LSAs was to allow for new opaque types to be introduced without backward issues. Also, earliar in this thread, there may have been some confusion between LSA type and opaque type. The LSA type for an opaque LSA is 9, 10, or 11 depending on the link scope. The opaque type is the first 8 bits of the opaque LSA's link ID. Hope this helps, Acee >Regards, >Joseph > >-----Original Message----- >From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM]On Behalf Of Acee >Lindem >Sent: 08 December 2004 04:46 PM >To: OSPF@PEACH.EASE.LSOFT.COM >Subject: Re: Unknown Opaque type > > >ÑîÑó wrote: > > > >>Joseph Placid, >> I think the LSA should be discarded without further processing. >> >> >> >> >Yang, > >Actually it should store it in its database and flood it at the >appropriate scope. See >section 2.0 of RFC 2370. > >Hope this helps, >Acee > > > > > >>======= 2004-12-08 16:20:00 ======= >> >> >> >> >> >>>Hi, >>> What should an opaque capable router do if it receives an opaque LSA >>>having an unknown opaque type through flooding? Is this mentioned in RFC >>>2370? >>> >>>Thanks, >>>Joseph >>> >>> >>> >>> >>= = = = = = = = = = = = = = = = = = = = >> >>Yang >>¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡yy01@mails.tsinghua.edu.cn >>¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2004-12-08 >> >>----------------------------------------------------- >>Yang Yang, Ph.D. Candidate >>Dept. E.E., Tsinghua Univ., Beijing 100084, P.R.CHINA >>----------------------------------------------------- >> >> >> >> >> > > > From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 14 17:52:24 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id RAA01755 for ; Tue, 14 Dec 2004 17:52:23 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <0.00F0E63E@cherry.ease.lsoft.com>; Tue, 14 Dec 2004 17:52:21 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 49141943 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 14 Dec 2004 17:52:20 -0500 Received: from 132.177.123.82 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 14 Dec 2004 17:52:20 -0500 Received: from iol.unh.edu (scrappy.iol.unh.edu [132.177.118.198]) by io.iol.unh.edu (8.13.1/8.13.1) with ESMTP id iBEMqGwV026451 for ; Tue, 14 Dec 2004 17:52:17 -0500 User-Agent: Mozilla/5.0 (X11; U; Linux alpha; en-US; rv:0.9.9) Gecko/20020503 X-Accept-Language: en-us, en MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-UNH-IOL-MailScanner-Information: Please contact systems@iol.unh.edu for more information X-UNH-IOL-MailScanner: Found to be clean X-UNH-IOL-MailScanner-From: mcleary@iol.unh.edu Message-ID: <41BF6F08.1040404@iol.unh.edu> Date: Tue, 14 Dec 2004 17:54:00 -0500 Reply-To: Mailing List Sender: Mailing List From: Mike Cleary Subject: Type 7 LSA question To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: 7bit Hello, I sent this issue before but have had no responce. I am having a bit of trouble trying to configure a router to send a type 7 lsa with the forwarding address set to 0.0.0.0. I was wondering if anyone could help me with the configuration of this on a cisco(cisco-like) router. The following quote is taken from section 3.2 of RFC 3101 and it leads me to believe that this can be done. (1) If the Type-7 LSA has the P-bit clear, or its forwarding address is set to 0.0.0.0, or the most specific Type-7 address range that subsumes the LSA's network has DoNotAdvertise status, then do nothing with this Type-7 LSA and consider the next one in the list. Otherwise term the LSA as translatable and proceed with step (2). The current configuration steps I take are to enable the router on network 10.10.11.0/24 in area 1 (nssa), give the router a static route 3.3.3.0/24 0.0.0.0, redistribute static on the router. When I issue the static route command it sometimes will allow the command sometimes it rejects it, either way I cannot get the router to redistribute the static route with the forwarding address set to 0.0.0.0. Any Suggestions? Thanks, ~Mike -- ********************************************* Michael Cleary Email: mcleary@iol.unh.edu IPv4 Consortium UNH InterOperability Lab 121 Technology Dr., Suite 2, Durham, NH 03824 Phone: 603-862-3941 http://www.iol.unh.edu ********************************************* From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 14 22:28:56 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id WAA21709 for ; Tue, 14 Dec 2004 22:28:56 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <5.00F0E98F@cherry.ease.lsoft.com>; Tue, 14 Dec 2004 22:28:55 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 49165609 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 14 Dec 2004 22:28:54 -0500 Received: from 64.102.122.148 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 14 Dec 2004 22:28:53 -0500 Received: from rtp-core-2.cisco.com (64.102.124.13) by rtp-iport-1.cisco.com with ESMTP; 14 Dec 2004 22:36:41 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-2.cisco.com (8.12.10/8.12.6) with ESMTP id iBF3Sp9E010669 for ; Tue, 14 Dec 2004 22:28:51 -0500 (EST) Received: from [192.168.2.6] (rtp-vpn1-27.cisco.com [10.82.224.27]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BEA09836; Tue, 14 Dec 2004 19:28:50 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <41BF6F08.1040404@iol.unh.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41BFAF72.5030902@cisco.com> Date: Tue, 14 Dec 2004 22:28:50 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: Type 7 LSA question To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <41BF6F08.1040404@iol.unh.edu> Precedence: list Content-Transfer-Encoding: 7bit Mike, Try redistributing a static route on a router internal to an NSSA that has nothing but unnumbered interfaces in the NSSA. Good Luck, Acee Mike Cleary wrote: > Hello, > I sent this issue before but have had no responce. I am having a bit of > trouble trying to configure a router to send a type 7 lsa with the > forwarding address set to 0.0.0.0. I was wondering if anyone could help > me with the configuration of this on a cisco(cisco-like) router. > > The following quote is taken from section 3.2 of RFC 3101 and it leads > me to believe that this can be done. > > > (1) If the Type-7 LSA has the P-bit clear, or its forwarding > address is set to 0.0.0.0, or the most specific Type-7 address > range that subsumes the LSA's network has DoNotAdvertise > status, then do nothing with this Type-7 LSA and consider the > next one in the list. Otherwise term the LSA as translatable > and proceed with step (2). > > > The current configuration steps I take are to enable the router on > network 10.10.11.0/24 in area 1 (nssa), give the router a static route > 3.3.3.0/24 0.0.0.0, redistribute static on the router. When I issue the > static route command it sometimes will allow the command sometimes it > rejects it, either way I cannot get the router to redistribute the > static route with the forwarding address set to 0.0.0.0. Any > Suggestions? > Thanks, > ~Mike > > -- > ********************************************* > Michael Cleary Email: mcleary@iol.unh.edu > IPv4 Consortium UNH InterOperability Lab > 121 Technology Dr., Suite 2, Durham, NH 03824 > Phone: 603-862-3941 http://www.iol.unh.edu > ********************************************* > From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 15 01:43:48 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id BAA05016 for ; Wed, 15 Dec 2004 01:43:48 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <19.00F0EE7C@cherry.ease.lsoft.com>; Wed, 15 Dec 2004 1:43:47 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 49184379 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 15 Dec 2004 01:43:38 -0500 Received: from 204.176.140.238 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 15 Dec 2004 01:43:37 -0500 Received: from manikantan (dsl-TN-200.240.247.61.touchtelindia.net [61.247.240.200] (may be forged)) (authenticated bits=0) by mail2.webindia.com (8.13.1/8.13.1) with ESMTP id iBF7npaP029144 for ; Tue, 14 Dec 2004 23:50:00 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook, Build 11.0.5510 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Thread-Index: AcTbRyj8f46ikLHdT5mY5hvfU4ebiAHJ8p3w X-IBIS-MailScanner-Information: Please contact the ISP for more information X-IBIS-MailScanner: Found to be clean X-MailScanner-From: manis@net-o2.com Message-ID: <200412150750.iBF7npaP029144@mail2.webindia.com> Date: Wed, 15 Dec 2004 12:13:36 +0530 Reply-To: Mailing List Sender: Mailing List From: Manikantan Srinivasan Organization: Net-O2 Technologies Subject: Re: Clarification related to Flooding an LSA by DR Other on its received interface To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <41B3D407.1010102@cisco.com> Precedence: list Content-Transfer-Encoding: 7bit Hello Acee Thank you for your reply. In my tests I notice the BDR generating an acknowledgement for the LS Update sent from DR_Other Router with unicast source address of the BDR. Since Acknowledgement is generated, can I conclude the DR other implementation as acceptable. Secondly will it be acceptable :) to conclude - When a DR_Other receives an LS Update from DR or BDR, it MAY flood it back on the received interface to DR/BDR as an unicast (addressed to DR/BDR) . Thanks again Best regards mani # -----Original Message----- # From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On # Behalf Of Acee Lindem # Sent: Monday, December 06, 2004 9:08 AM # To: OSPF@PEACH.EASE.LSOFT.COM # Subject: Re: Clarification related to Flooding an LSA by DR # Other on its received interface # # Manikantan Srinivasan wrote: # # >Hello # > # >Good day to you. # > # >I have the following doubt/question. # > # >As per Sec 13.3 Bullet 3 (Page 150) RFC 2328, # > # > (3) If the new LSA was received on this interface, and it was # > received from either the Designated Router or the Backup # > Designated Router, chances are that all the # neighbors have # > received the LSA already. Therefore, examine the next # > interface. # > # >I understand, when a DR other (Router 1) receives an LSA from a DR # >(Router 2), Router 1 will skip flooding back the received # LSA back in # >the received interface. # > # >1) Is this a "SHOULD" condition, i.e DR Other SHOULD not # flood the LSA back? # >Or # > # >2) can (DR Other) MAY flood the LSA over the received # interface? If so # >what should be the destination address? # > # >3) I notice few (atleast 2) implementations (when the DUT is # DR Other), # >the LSA received from DR is flooded back on the received # interface, as # >a unicast packet addressed to BDR. Is this a valid # >condition/implementation? IS this behavior a "SHOULD" condition? # > # > # Hi Mani, # # I've re-read RFC 2328 and unfortunately the broadcast network # flooding is complex and not all that clear. What I suspect is # happening is that the DR-other router is adding the new LSA # to its retransmission list and retransmitting when the timer # expires. Based on RFC 2328, this is correct. However, section # 13.5 is somewhat unclear on whether or not the BDR should # send a delayed acknowledgement. I think that it should since # the BDR is NOT the router that re-flooded the LSA out the # receiving interface (as determined in section 13, step 5b) - # even though the BDR knows that the DR is reflooding it out # the receiving interface. # Consequently, the first thing I would check before suspecting # two separate DR-other implementations is whether or not the # BDR is sending the delayed acknowledgement. If it is not, # then it is the implementation that is culpable. # # Other opinions are welcome. # # Thanks, # Acee # # >Thanks in advance # > # >With best regards # >Mani # > # > # > From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 15 16:05:04 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id QAA10763 for ; Wed, 15 Dec 2004 16:05:03 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <17.00F1014B@cherry.ease.lsoft.com>; Wed, 15 Dec 2004 16:05:04 -0500 Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 49311342 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 15 Dec 2004 16:05:01 -0500 Received: from 132.177.123.82 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 15 Dec 2004 16:05:01 -0500 Received: from iol.unh.edu (scrappy.iol.unh.edu [132.177.118.198]) by io.iol.unh.edu (8.13.1/8.13.1) with ESMTP id iBFL4vBA022416 for ; Wed, 15 Dec 2004 16:04:58 -0500 User-Agent: Mozilla/5.0 (X11; U; Linux alpha; en-US; rv:0.9.9) Gecko/20020503 X-Accept-Language: en-us, en MIME-Version: 1.0 References: <41BF6F08.1040404@iol.unh.edu> <41BFAF72.5030902@cisco.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-UNH-IOL-MailScanner-Information: Please contact systems@iol.unh.edu for more information X-UNH-IOL-MailScanner: Found to be clean X-UNH-IOL-MailScanner-From: mcleary@iol.unh.edu Message-ID: <41C0A763.60502@iol.unh.edu> Date: Wed, 15 Dec 2004 16:06:43 -0500 Reply-To: Mailing List Sender: Mailing List From: Mike Cleary Subject: Re: Type 7 LSA question To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: 7bit Hello Acee, I am a little confused. How would I configure a router to have an unnumbered interface in an nssa? Thanks, ~Mike Acee Lindem wrote: > Mike, > Try redistributing a static route on a router internal to an NSSA that > has nothing but unnumbered interfaces in the NSSA. > > Good Luck, > Acee > > > Mike Cleary wrote: > >> Hello, >> I sent this issue before but have had no responce. I am having a bit of >> trouble trying to configure a router to send a type 7 lsa with the >> forwarding address set to 0.0.0.0. I was wondering if anyone could help >> me with the configuration of this on a cisco(cisco-like) router. >> >> The following quote is taken from section 3.2 of RFC 3101 and it leads >> me to believe that this can be done. >> >> >> (1) If the Type-7 LSA has the P-bit clear, or its forwarding >> address is set to 0.0.0.0, or the most specific Type-7 address >> range that subsumes the LSA's network has DoNotAdvertise >> status, then do nothing with this Type-7 LSA and consider the >> next one in the list. Otherwise term the LSA as translatable >> and proceed with step (2). >> >> >> The current configuration steps I take are to enable the router on >> network 10.10.11.0/24 in area 1 (nssa), give the router a static route >> 3.3.3.0/24 0.0.0.0, redistribute static on the router. When I issue the >> static route command it sometimes will allow the command sometimes it >> rejects it, either way I cannot get the router to redistribute the >> static route with the forwarding address set to 0.0.0.0. Any >> Suggestions? >> Thanks, >> ~Mike >> >> -- >> ********************************************* >> Michael Cleary Email: mcleary@iol.unh.edu >> IPv4 Consortium UNH InterOperability Lab >> 121 Technology Dr., Suite 2, Durham, NH 03824 >> Phone: 603-862-3941 http://www.iol.unh.edu >> ********************************************* >> > -- ********************************************* Michael Cleary Email: mcleary@iol.unh.edu IPv4 Consortium UNH InterOperability Lab 121 Technology Dr., Suite 2, Durham, NH 03824 Phone: 603-862-3941 http://www.iol.unh.edu ********************************************* From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 16 18:41:48 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id SAA28786 for ; Thu, 16 Dec 2004 18:41:48 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <5.00F121D4@cherry.ease.lsoft.com>; Thu, 16 Dec 2004 18:41:45 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 49493126 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 16 Dec 2004 18:41:42 -0500 Received: from 64.102.122.148 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Thu, 16 Dec 2004 18:41:41 -0500 Received: from rtp-core-2.cisco.com (64.102.124.13) by rtp-iport-1.cisco.com with ESMTP; 16 Dec 2004 18:49:48 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-2.cisco.com (8.12.10/8.12.6) with ESMTP id iBGNfb9E020101 for ; Thu, 16 Dec 2004 18:41:37 -0500 (EST) Received: from [192.168.2.6] (sjc-vpn5-210.cisco.com [10.21.88.210]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BEB53361; Thu, 16 Dec 2004 15:41:37 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <41BF6F08.1040404@iol.unh.edu> <41BFAF72.5030902@cisco.com> <41C0A763.60502@iol.unh.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41C21D30.7060205@cisco.com> Date: Thu, 16 Dec 2004 18:41:36 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: Type 7 LSA question To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <41C0A763.60502@iol.unh.edu> Precedence: list Content-Transfer-Encoding: 7bit Mike Cleary wrote: > Hello Acee, > I am a little confused. How would I configure a router to have an > unnumbered interface in an nssa? Hello Mike, It's not that easy - you must include the network for the interface referenced by the unnumbered interface points and shut the referenced interface to make it unavailable for use as a forwarding address. I'll send you a config offline as this is somewhat vendor specific. Good Luck, Acee > Thanks, > ~Mike > > Acee Lindem wrote: > >> Mike, >> Try redistributing a static route on a router internal to an NSSA that >> has nothing but unnumbered interfaces in the NSSA. >> >> Good Luck, >> Acee >> >> >> Mike Cleary wrote: >> >>> Hello, >>> I sent this issue before but have had no responce. I am having a >>> bit of >>> trouble trying to configure a router to send a type 7 lsa with the >>> forwarding address set to 0.0.0.0. I was wondering if anyone could >>> help >>> me with the configuration of this on a cisco(cisco-like) router. >>> >>> The following quote is taken from section 3.2 of RFC 3101 and it leads >>> me to believe that this can be done. >>> >>> >>> (1) If the Type-7 LSA has the P-bit clear, or its forwarding >>> address is set to 0.0.0.0, or the most specific Type-7 address >>> range that subsumes the LSA's network has DoNotAdvertise >>> status, then do nothing with this Type-7 LSA and consider the >>> next one in the list. Otherwise term the LSA as translatable >>> and proceed with step (2). >>> >>> >>> The current configuration steps I take are to enable the router on >>> network 10.10.11.0/24 in area 1 (nssa), give the router a static route >>> 3.3.3.0/24 0.0.0.0, redistribute static on the router. When I issue >>> the >>> static route command it sometimes will allow the command sometimes it >>> rejects it, either way I cannot get the router to redistribute the >>> static route with the forwarding address set to 0.0.0.0. Any >>> Suggestions? >>> Thanks, >>> ~Mike >>> >>> -- >>> ********************************************* >>> Michael Cleary Email: mcleary@iol.unh.edu >>> IPv4 Consortium UNH InterOperability Lab >>> 121 Technology Dr., Suite 2, Durham, NH 03824 >>> Phone: 603-862-3941 http://www.iol.unh.edu >>> ********************************************* >>> >> > > > -- > ********************************************* > Michael Cleary Email: mcleary@iol.unh.edu > IPv4 Consortium UNH InterOperability Lab > 121 Technology Dr., Suite 2, Durham, NH 03824 > Phone: 603-862-3941 http://www.iol.unh.edu > ********************************************* > From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 16 19:05:41 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id TAA00557 for ; Thu, 16 Dec 2004 19:05:41 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <18.00F12124@cherry.ease.lsoft.com>; Thu, 16 Dec 2004 19:05:43 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 49496408 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 16 Dec 2004 19:05:42 -0500 Received: from 64.102.122.149 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Thu, 16 Dec 2004 19:05:42 -0500 Received: from rtp-core-2.cisco.com (64.102.124.13) by rtp-iport-2.cisco.com with ESMTP; 16 Dec 2004 19:05:41 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-2.cisco.com (8.12.10/8.12.6) with ESMTP id iBH05c9E027072 for ; Thu, 16 Dec 2004 19:05:38 -0500 (EST) Received: from [192.168.2.6] (sjc-vpn5-210.cisco.com [10.21.88.210]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BEB54702; Thu, 16 Dec 2004 16:05:38 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <41BF6F08.1040404@iol.unh.edu> <41BFAF72.5030902@cisco.com> <41C0A763.60502@iol.unh.edu> <41C21D30.7060205@cisco.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41C222D1.8070405@cisco.com> Date: Thu, 16 Dec 2004 19:05:37 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: Type 7 LSA question To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <41C21D30.7060205@cisco.com> Precedence: list Content-Transfer-Encoding: 7bit Acee Lindem wrote: > Mike Cleary wrote: > >> Hello Acee, >> I am a little confused. How would I configure a router to have an >> unnumbered interface in an nssa? > > > Hello Mike, > > It's not that easy - you must include the network for the interface > referenced by > the unnumbered interface points and shut the referenced interface to make > it unavailable for use as a forwarding address. I'll send you a config > offline as this is somewhat vendor specific. Mike, I take that back - there is no way to get the NSSA forwarding address to be advertised as 0 as long as there are any up interfaces in the NSSA (which would be required for your test suites). Thanks, Acee > > Good Luck, > Acee > >> Thanks, >> ~Mike >> >> Acee Lindem wrote: >> >>> Mike, >>> Try redistributing a static route on a router internal to an NSSA that >>> has nothing but unnumbered interfaces in the NSSA. >>> >>> Good Luck, >>> Acee >>> >>> >>> Mike Cleary wrote: >>> >>>> Hello, >>>> I sent this issue before but have had no responce. I am having a >>>> bit of >>>> trouble trying to configure a router to send a type 7 lsa with the >>>> forwarding address set to 0.0.0.0. I was wondering if anyone could >>>> help >>>> me with the configuration of this on a cisco(cisco-like) router. >>>> >>>> The following quote is taken from section 3.2 of RFC 3101 and it leads >>>> me to believe that this can be done. >>>> >>>> >>>> (1) If the Type-7 LSA has the P-bit clear, or its forwarding >>>> address is set to 0.0.0.0, or the most specific Type-7 address >>>> range that subsumes the LSA's network has DoNotAdvertise >>>> status, then do nothing with this Type-7 LSA and consider the >>>> next one in the list. Otherwise term the LSA as translatable >>>> and proceed with step (2). >>>> >>>> >>>> The current configuration steps I take are to enable the router on >>>> network 10.10.11.0/24 in area 1 (nssa), give the router a static route >>>> 3.3.3.0/24 0.0.0.0, redistribute static on the router. When I >>>> issue the >>>> static route command it sometimes will allow the command sometimes it >>>> rejects it, either way I cannot get the router to redistribute the >>>> static route with the forwarding address set to 0.0.0.0. Any >>>> Suggestions? >>>> Thanks, >>>> ~Mike >>>> >>>> -- >>>> ********************************************* >>>> Michael Cleary Email: mcleary@iol.unh.edu >>>> IPv4 Consortium UNH InterOperability Lab >>>> 121 Technology Dr., Suite 2, Durham, NH 03824 >>>> Phone: 603-862-3941 http://www.iol.unh.edu >>>> ********************************************* >>>> >>> >> >> >> -- >> ********************************************* >> Michael Cleary Email: mcleary@iol.unh.edu >> IPv4 Consortium UNH InterOperability Lab >> 121 Technology Dr., Suite 2, Durham, NH 03824 >> Phone: 603-862-3941 http://www.iol.unh.edu >> ********************************************* >> > From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 16 19:32:42 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id TAA02721 for ; Thu, 16 Dec 2004 19:32:42 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <13.00F1226A@cherry.ease.lsoft.com>; Thu, 16 Dec 2004 19:32:44 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 49497991 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 16 Dec 2004 19:32:43 -0500 Received: from 64.47.51.130 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Thu, 16 Dec 2004 19:32:43 -0500 Received: from vpndg ([128.251.10.1] unverified) by exchange.timetra.com with Microsoft SMTPSVC(5.0.2195.6713); Thu, 16 Dec 2004 16:32:39 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1478 Importance: Normal X-OriginalArrivalTime: 17 Dec 2004 00:32:39.0096 (UTC) FILETIME=[E9A69380:01C4E3CF] Message-ID: Date: Thu, 16 Dec 2004 16:33:39 -0800 Reply-To: Mailing List Sender: Mailing List From: Don Goodspeed Subject: Re: Type 7 LSA question Comments: To: Acee Lindem To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <41C222D1.8070405@cisco.com> Precedence: list Content-Transfer-Encoding: 7bit Mike, This part of the NSSA RFC was written with older implementations in mind that did this on origination of NSSA LSAs. To support that, when the spec was updated, the language was made stronger on what should be transmitted but kept less strict was what should be accepted on receipt. So while you probably will not find an implementation that sends 0.0.0.0 as the forwarding address on origination, you should be able to test the reception of this by using your own IOL test tool for OSPF, or a puchased conformance or traffic generation vendor such as Ixia (IxOS or ANVL), Agilent's RouterTester (NSX), or Spirent's Adtech solution. Cheers, Don -----Original Message----- From: owner-ospf@PEACH.EASE.LSOFT.COM [mailto:owner-ospf@PEACH.EASE.LSOFT.COM]On Behalf Of Acee Lindem Sent: Thursday, December 16, 2004 4:06 PM To: Mailing List Subject: Re: Type 7 LSA question Acee Lindem wrote: > Mike Cleary wrote: > >> Hello Acee, >> I am a little confused. How would I configure a router to have an >> unnumbered interface in an nssa? > > > Hello Mike, > > It's not that easy - you must include the network for the interface > referenced by > the unnumbered interface points and shut the referenced interface to make > it unavailable for use as a forwarding address. I'll send you a config > offline as this is somewhat vendor specific. Mike, I take that back - there is no way to get the NSSA forwarding address to be advertised as 0 as long as there are any up interfaces in the NSSA (which would be required for your test suites). Thanks, Acee > > Good Luck, > Acee > >> Thanks, >> ~Mike >> >> Acee Lindem wrote: >> >>> Mike, >>> Try redistributing a static route on a router internal to an NSSA that >>> has nothing but unnumbered interfaces in the NSSA. >>> >>> Good Luck, >>> Acee >>> >>> >>> Mike Cleary wrote: >>> >>>> Hello, >>>> I sent this issue before but have had no responce. I am having a >>>> bit of >>>> trouble trying to configure a router to send a type 7 lsa with the >>>> forwarding address set to 0.0.0.0. I was wondering if anyone could >>>> help >>>> me with the configuration of this on a cisco(cisco-like) router. >>>> >>>> The following quote is taken from section 3.2 of RFC 3101 and it leads >>>> me to believe that this can be done. >>>> >>>> >>>> (1) If the Type-7 LSA has the P-bit clear, or its forwarding >>>> address is set to 0.0.0.0, or the most specific Type-7 address >>>> range that subsumes the LSA's network has DoNotAdvertise >>>> status, then do nothing with this Type-7 LSA and consider the >>>> next one in the list. Otherwise term the LSA as translatable >>>> and proceed with step (2). >>>> >>>> >>>> The current configuration steps I take are to enable the router on >>>> network 10.10.11.0/24 in area 1 (nssa), give the router a static route >>>> 3.3.3.0/24 0.0.0.0, redistribute static on the router. When I >>>> issue the >>>> static route command it sometimes will allow the command sometimes it >>>> rejects it, either way I cannot get the router to redistribute the >>>> static route with the forwarding address set to 0.0.0.0. Any >>>> Suggestions? >>>> Thanks, >>>> ~Mike >>>> >>>> -- >>>> ********************************************* >>>> Michael Cleary Email: mcleary@iol.unh.edu >>>> IPv4 Consortium UNH InterOperability Lab >>>> 121 Technology Dr., Suite 2, Durham, NH 03824 >>>> Phone: 603-862-3941 http://www.iol.unh.edu >>>> ********************************************* >>>> >>> >> >> >> -- >> ********************************************* >> Michael Cleary Email: mcleary@iol.unh.edu >> IPv4 Consortium UNH InterOperability Lab >> 121 Technology Dr., Suite 2, Durham, NH 03824 >> Phone: 603-862-3941 http://www.iol.unh.edu >> ********************************************* >> > From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 16 19:34:24 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id TAA02869 for ; Thu, 16 Dec 2004 19:34:24 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <9.00F1221F@cherry.ease.lsoft.com>; Thu, 16 Dec 2004 19:34:27 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 49498074 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 16 Dec 2004 19:34:26 -0500 Received: from 64.102.122.148 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Thu, 16 Dec 2004 19:34:25 -0500 Received: from rtp-core-2.cisco.com (64.102.124.13) by rtp-iport-1.cisco.com with ESMTP; 16 Dec 2004 19:42:33 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-2.cisco.com (8.12.10/8.12.6) with ESMTP id iBH0YN9E004065 for ; Thu, 16 Dec 2004 19:34:23 -0500 (EST) Received: from [192.168.2.6] (sjc-vpn5-210.cisco.com [10.21.88.210]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BEB56399; Thu, 16 Dec 2004 16:34:21 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <41BF6F08.1040404@iol.unh.edu> <41BFAF72.5030902@cisco.com> <41C0A763.60502@iol.unh.edu> <41C21D30.7060205@cisco.com> <41C222D1.8070405@cisco.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41C2298C.6000107@cisco.com> Date: Thu, 16 Dec 2004 19:34:20 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: Type 7 LSA question To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <41C222D1.8070405@cisco.com> Precedence: list Content-Transfer-Encoding: 7bit In reviewing RFC 3101, the recommended configuration is to provide control over the P LSA option bit when redistributing (aka importing) external routes into an NSSA. There is no requirement on an implementation to provide a way to set the forwarding address to 0 - although a non-zero forwarding address is only required when the P bit is set. Acee Lindem wrote: > Acee Lindem wrote: > >> Mike Cleary wrote: >> >>> Hello Acee, >>> I am a little confused. How would I configure a router to have an >>> unnumbered interface in an nssa? >> >> >> >> Hello Mike, >> >> It's not that easy - you must include the network for the interface >> referenced by >> the unnumbered interface points and shut the referenced interface to >> make >> it unavailable for use as a forwarding address. I'll send you a config >> offline as this is somewhat vendor specific. > > > Mike, > I take that back - there is no way to get the NSSA forwarding address > to be > advertised as 0 as long as there are any up interfaces in the NSSA > (which would > be required for your test suites). > Thanks, > Acee > > >> >> Good Luck, >> Acee >> >>> Thanks, >>> ~Mike >>> >>> Acee Lindem wrote: >>> >>>> Mike, >>>> Try redistributing a static route on a router internal to an NSSA that >>>> has nothing but unnumbered interfaces in the NSSA. >>>> >>>> Good Luck, >>>> Acee >>>> >>>> >>>> Mike Cleary wrote: >>>> >>>>> Hello, >>>>> I sent this issue before but have had no responce. I am having a >>>>> bit of >>>>> trouble trying to configure a router to send a type 7 lsa with the >>>>> forwarding address set to 0.0.0.0. I was wondering if anyone >>>>> could help >>>>> me with the configuration of this on a cisco(cisco-like) router. >>>>> >>>>> The following quote is taken from section 3.2 of RFC 3101 and it >>>>> leads >>>>> me to believe that this can be done. >>>>> >>>>> >>>>> (1) If the Type-7 LSA has the P-bit clear, or its forwarding >>>>> address is set to 0.0.0.0, or the most specific Type-7 >>>>> address >>>>> range that subsumes the LSA's network has DoNotAdvertise >>>>> status, then do nothing with this Type-7 LSA and consider the >>>>> next one in the list. Otherwise term the LSA as translatable >>>>> and proceed with step (2). >>>>> >>>>> >>>>> The current configuration steps I take are to enable the router on >>>>> network 10.10.11.0/24 in area 1 (nssa), give the router a static >>>>> route >>>>> 3.3.3.0/24 0.0.0.0, redistribute static on the router. When I >>>>> issue the >>>>> static route command it sometimes will allow the command sometimes it >>>>> rejects it, either way I cannot get the router to redistribute the >>>>> static route with the forwarding address set to 0.0.0.0. Any >>>>> Suggestions? >>>>> Thanks, >>>>> ~Mike >>>>> >>>>> -- >>>>> ********************************************* >>>>> Michael Cleary Email: mcleary@iol.unh.edu >>>>> IPv4 Consortium UNH InterOperability Lab >>>>> 121 Technology Dr., Suite 2, Durham, NH 03824 >>>>> Phone: 603-862-3941 http://www.iol.unh.edu >>>>> ********************************************* >>>>> >>>> >>> >>> >>> -- >>> ********************************************* >>> Michael Cleary Email: mcleary@iol.unh.edu >>> IPv4 Consortium UNH InterOperability Lab >>> 121 Technology Dr., Suite 2, Durham, NH 03824 >>> Phone: 603-862-3941 http://www.iol.unh.edu >>> ********************************************* >>> >> > From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 16 21:31:21 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id VAA13051 for ; Thu, 16 Dec 2004 21:31:17 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <7.00F124D3@cherry.ease.lsoft.com>; Thu, 16 Dec 2004 21:31:16 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 49507301 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 16 Dec 2004 21:31:14 -0500 Received: from 64.102.122.148 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Thu, 16 Dec 2004 21:31:14 -0500 Received: from rtp-core-1.cisco.com (64.102.124.12) by rtp-iport-1.cisco.com with ESMTP; 16 Dec 2004 21:39:22 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-1.cisco.com (8.12.10/8.12.6) with ESMTP id iBH2VCHS020021 for ; Thu, 16 Dec 2004 21:31:12 -0500 (EST) Received: from [192.168.2.6] (sjc-vpn5-210.cisco.com [10.21.88.210]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BEB61282; Thu, 16 Dec 2004 18:31:10 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <200412150750.iBF7npaP029144@mail2.webindia.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41C244ED.5000007@cisco.com> Date: Thu, 16 Dec 2004 21:31:09 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: Clarification related to Flooding an LSA by DR Other on its received interface To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <200412150750.iBF7npaP029144@mail2.webindia.com> Precedence: list Content-Transfer-Encoding: 7bit Mani, I don't think you've given enough information to conclude whether the routers under test behave precisely as described in section 13 of RFC 2328. 1) Where did the DR get the LSA it is flooding? Specifically, was it self-originated, received from another router on the broadcast network, or received on a different interface? 2) If it was received from another router on the broadcast network, which one? Is it the same one that you are observing unicasting to the BDR? Note that it would be better to preform this test without any other OSPF links between the routers on the broadcast network. Acee Manikantan Srinivasan wrote: >Hello Acee > >Thank you for your reply. > >In my tests I notice the BDR generating an acknowledgement for the LS Update >sent from DR_Other Router with unicast source address of the BDR. > >Since Acknowledgement is generated, can I conclude the DR other >implementation as acceptable. > >Secondly will it be acceptable :) to conclude - When a DR_Other receives an >LS Update from DR or BDR, it MAY flood it back on the received interface to >DR/BDR as an unicast (addressed to DR/BDR) . > >Thanks again > >Best regards >mani > > ># -----Original Message----- ># From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On ># Behalf Of Acee Lindem ># Sent: Monday, December 06, 2004 9:08 AM ># To: OSPF@PEACH.EASE.LSOFT.COM ># Subject: Re: Clarification related to Flooding an LSA by DR ># Other on its received interface ># ># Manikantan Srinivasan wrote: ># ># >Hello ># > ># >Good day to you. ># > ># >I have the following doubt/question. ># > ># >As per Sec 13.3 Bullet 3 (Page 150) RFC 2328, ># > ># > (3) If the new LSA was received on this interface, and it was ># > received from either the Designated Router or the Backup ># > Designated Router, chances are that all the ># neighbors have ># > received the LSA already. Therefore, examine the next ># > interface. ># > ># >I understand, when a DR other (Router 1) receives an LSA from a DR ># >(Router 2), Router 1 will skip flooding back the received ># LSA back in ># >the received interface. ># > ># >1) Is this a "SHOULD" condition, i.e DR Other SHOULD not ># flood the LSA back? ># >Or ># > ># >2) can (DR Other) MAY flood the LSA over the received ># interface? If so ># >what should be the destination address? ># > ># >3) I notice few (atleast 2) implementations (when the DUT is ># DR Other), ># >the LSA received from DR is flooded back on the received ># interface, as ># >a unicast packet addressed to BDR. Is this a valid ># >condition/implementation? IS this behavior a "SHOULD" condition? ># > ># > ># Hi Mani, ># ># I've re-read RFC 2328 and unfortunately the broadcast network ># flooding is complex and not all that clear. What I suspect is ># happening is that the DR-other router is adding the new LSA ># to its retransmission list and retransmitting when the timer ># expires. Based on RFC 2328, this is correct. However, section ># 13.5 is somewhat unclear on whether or not the BDR should ># send a delayed acknowledgement. I think that it should since ># the BDR is NOT the router that re-flooded the LSA out the ># receiving interface (as determined in section 13, step 5b) - ># even though the BDR knows that the DR is reflooding it out ># the receiving interface. ># Consequently, the first thing I would check before suspecting ># two separate DR-other implementations is whether or not the ># BDR is sending the delayed acknowledgement. If it is not, ># then it is the implementation that is culpable. ># ># Other opinions are welcome. ># ># Thanks, ># Acee ># ># >Thanks in advance ># > ># >With best regards ># >Mani ># > ># > ># > > > > From owner-ospf@PEACH.EASE.LSOFT.COM Fri Dec 17 04:00:54 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id EAA25878 for ; Fri, 17 Dec 2004 04:00:53 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <10.00F12D90@cherry.ease.lsoft.com>; Fri, 17 Dec 2004 4:00:52 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 49538335 for OSPF@PEACH.EASE.LSOFT.COM; Fri, 17 Dec 2004 04:00:51 -0500 Received: from 203.199.83.247 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Fri, 17 Dec 2004 04:00:50 -0500 Received: (qmail 32387 invoked by uid 510); 17 Dec 2004 09:01:37 -0000 Received: from unknown (203.126.136.223) by rediffmail.com via HTTP; 17 dec 2004 09:01:37 -0000 MIME-Version: 1.0 Content-type: multipart/alternative; boundary="Next_1103274097---0-203.199.83.247-32382" Message-ID: <20041217090137.32386.qmail@mailweb34.rediffmail.com> Date: Fri, 17 Dec 2004 09:01:37 -0000 Reply-To: Mailing List Sender: Mailing List From: Vivek Dubey Subject: Re: draft-ietf-ospf-cap-04.txt To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list This is a multipart mime message --Next_1103274097---0-203.199.83.247-32382 Content-type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable JP,=0AComments inlined:=0A=0AIndeed. In the case of TE, there are various c= ases where a router may=0Awant to advertise a capability with different flo= oding scopes thus two=0Adifferent opaque LSAs. For instance, a router may b= elong to two=0Adifferent meshes of TE LSPs, one local to its area (RI LSA o= f Type 10)=0Aone across the routing domain (RI LSA of Type 11). =0A=0Avivek= > If i understand correctly you are referring to the case when router has a= ttached NSSA/STUB area's, otherwise RI LSA of Type 11, would suffice.=0A=0A= The same TLV (automesh) is used, with different contents, carried in differ= ent LSA (type 10 and 11).=0A=0Avivek> Why same TLV is required to carry dif= ferent contents in different scoped LSAs. What if same contents are carried= in both Type 10 and Type 11 RI opaque LSAs. Are we intending to hide some = information across different OSPF flooding scopes ? Since router's capabili= ty is independent of "Flooding Scopes", that should not be the case.=0A=0AT= hanks=0AVivek=0A=0A=0A=0A=0AOn Wed, 08 Dec 2004 JP Vasseur wrote :=0A>Hi Vi= vek,=0A>=0A>On Dec 7, 2004, at 5:16 PM, Acee Lindem wrote:=0A>=0A>>Hi Vivek= ,=0A>>=0A>>=0A>>Vivek Dubey wrote:=0A>>=0A>>>Peter,=0A>>>=0A>>>1) In case o= f ABR analogy, the information was directly relevant to=0A>>> OSPF routin= g and even than it was provided as configuration option,=0A>>> not a "sho= uld" condition.=0A>>>=0A>>I think the configuration option is implementatio= n specific. Although=0A>>it is=0A>>not covered explicitly I think RFC 3103 = implies an ABR will=0A>>redistribute=0A>>into both attached NSSAs and regul= ar areas.=0A>>=0A>>=0A>>>=0A>>> Here, OSPF RI Opaque LSA is used for both= :=0A>>> a) Advertising router's OSPF capabilities (TLV 1)=0A>>> b) Capa= blities Opaque to OSPF (Any future TLVs defined)=0A>>>=0A>>> And since fl= ooding scope is per TLV and depends on local policy,=0A>>> there should b= e no dependency on Type's of area configured at OSPF=0A>>> level.=0A>>>= =0A>>>2)=0A>>>draft>An OSPF router MAY advertise different capabilities whe= n both=0A>>> NSSA/stub area type 10 LSA(s) and an AS scoped type 11 o= paque=0A>>> LSA is advertised.=0A>>>vivek> Capabilities here should m= ap to different TLV's ??=0A>>>=0A>>>Peter>I guess it can be different TLVs = or different content in the=0A>>>same TLV.=0A>>>=0A>>>vivek> Different cont= ent in same TLV, advertised in different scoped=0A>>> LSAs (Type 10 a= nd Type 11). Doesnt seems a good idea to me.=0A>>> Any possible scena= rios?=0A>>>=0A>>JP - can you take a shot at this? I seem to remember that y= ou had a=0A>>scenario in minde.=0A>>=0A>=0A>Indeed. In the case of TE, ther= e are various cases where a router may=0A>want to advertise a capability wi= th different flooding scopes thus two=0A>different opaque LSAs. For instanc= e, a router may belong to two=0A>different meshes of TE LSPs, one local to = its area (RI LSA of Type 10)=0A>one across the routing domain (RI LSA of Ty= pe 11). The same TLV=0A>(automesh) is used, with different contents, carrie= d in different LSA=0A>(type 10 and 11).=0A>=0A>Thanks.=0A>=0A>JP.=0A>=0A>>T= hanks,=0A>>Acee=0A>>=0A>>>=0A>>>Thanks=0A>>>Vivek=0A>>>=0A>>>=0A>>>=0A>>>= =0A>>>=0A>>>On Tue, 07 Dec 2004 Peter Psenak wrote :=0A>>> >Vivek,=0A>>> >= =0A>>> >Vivek Dubey wrote:=0A>>> >>Hi,=0A>>> >>Section 2.3:=0A>>> >>draft>T= LV flooding scope rules will be specified on a per-TLV basis=0A>>> >>draft>= If a type 11 opaque LSA is chosen, the originating router=0A>>>should=0A>>>= >> also advertise type 10 LSA(s) into any attached NSSA/stub area=0A>= >> >>=0A>>> >>vivek) If scope of TLV is defined to be AS (Type 11), why sho= uld,=0A>>>the=0A>>> >> originating router advertise type 10 LSA(s) int= o any=0A>>> >> attached NSSA/stub area ? Idea seems to get the capabil= ities=0A>>> >> advertised to NSSA/STUB neighbors of originating router= . But=0A>>> >> what about NSSA/STUB areas attached not to "originating= "=0A>>> >> routers??=0A>>> >=0A>>> >an analogy is when you have an ABR= connected to backbone area and=0A>>>NSSA=0A>>> >area and you redistribute = routes from some external source. ABR will=0A>>> >generate Type-5 external = LSA, plus it can be configured to advertise=0A>>> >Type-7 LSA to the NSSA a= rea for the same prefix.=0A>>> >If you have another ASBR somewhere in backb= one area, Type-5 LSAs it=0A>>> >generates will not get propagated to NSSA a= rea.=0A>>> >=0A>>> >>=0A>>> >>draft>An OSPF router MAY advertise different = capabilities when both=0A>>> >> NSSA/stub area type 10 LSA(s) and an A= S scoped type 11 opaque=0A>>> >> LSA is advertised.=0A>>> >>vivek> Cap= abilities here should map to different TLV's ??=0A>>> >=0A>>> >I guess it c= an be different TLVs or different content in the same=0A>>>TLV.=0A>>> >=0A>= >> >Peter=0A>>> >=0A>>> >>=0A>>> >>Thanks=0A>>> >>Vivek=0A>>> >>=0A>>> >>= =0A>>> >>=0A>>> >>=0A>>>= =0A>>>=0A>>>=0A>>>=0A>>= =0A --Next_1103274097---0-203.199.83.247-32382 Content-type: text/html; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable

=0AJP,
=0AComments inlined:
=0A
=0AIndeed. In the case of TE, t= here are various cases where a router may
=0Awant to advertise a capabil= ity with different flooding scopes thus two
=0Adifferent opaque LSAs. Fo= r instance, a router may belong to two
=0Adifferent meshes of TE LSPs, o= ne local to its area (RI LSA of Type 10)
=0Aone across the routing domai= n (RI LSA of Type 11).
=0A
=0Avivek> If i understand correctly yo= u are referring to the case when router has attached NSSA/STUB area's, othe= rwise RI LSA of Type 11, would suffice.
=0A
=0AThe same TLV (automesh= ) is used, with different contents, carried in different LSA (type 10 and 1= 1).
=0A
=0Avivek> Why same TLV is required to carry different cont= ents in different scoped LSAs. What if same contents are carried in both Ty= pe 10 and Type 11 RI opaque LSAs. Are we intending to hide some information= across different OSPF flooding scopes ? Since router's capability is indep= endent of "Flooding Scopes", that should not be the case.
=0A<= BR>=0AThanks
=0AVivek
=0A
=0A
=0A
=0A
=0AOn Wed, 08 Dec 2= 004 JP Vasseur wrote :
=0A>Hi Vivek,
=0A>
=0A>On Dec 7, 2= 004, at 5:16 PM, Acee Lindem wrote:
=0A>
=0A>>Hi Vivek,
= =0A>>
=0A>>
=0A>>Vivek Dubey wrote:
=0A>><= BR>=0A>>>Peter,
=0A>>>
=0A>>>1) In case of= ABR analogy, the information was directly relevant to
=0A>>>&n= bsp; OSPF routing and even than it was provided as configuration option,=0A>>>  not a "should" condition.
=0A>>= >
=0A>>I think the configuration option is implementation speci= fic. Although
=0A>>it is
=0A>>not covered explicitly I th= ink RFC 3103 implies an ABR will
=0A>>redistribute
=0A>>i= nto both attached NSSAs and regular areas.
=0A>>
=0A>>=0A>>>
=0A>>>  Here, OSPF RI Opaque LSA is used= for both:
=0A>>>  a) Advertising router's OSPF capabilit= ies (TLV 1)
=0A>>>  b) Capablities Opaque to OSPF (Any fu= ture TLVs defined)
=0A>>>
=0A>>>  And since f= looding scope is per TLV and depends on local policy,
=0A>>>&nb= sp; there should be no dependency on Type's of area configured at OSPF
= =0A>>>  level.
=0A>>>
=0A>>>2)
= =0A>>>draft>An OSPF router MAY advertise different capabilities= when both
=0A>>>      NSSA/stub area type 10 L= SA(s) and an AS scoped type 11 opaque
=0A>>>     = ; LSA is advertised.
=0A>>>vivek> Capabilities here should = map to different TLV's ??
=0A>>>
=0A>>>Peter>I g= uess it can be different TLVs or different content in the
=0A>>>= ;same TLV.
=0A>>>
=0A>>>vivek> Different content= in same TLV, advertised in different scoped
=0A>>>   = ;   LSAs (Type 10 and Type 11). Doesnt seems a good idea to me.
= =0A>>>      Any possible scenarios?
=0A>>= >
=0A>>JP - can you take a shot at this? I seem to remember tha= t you had a
=0A>>scenario in minde.
=0A>>
=0A>
= =0A>Indeed. In the case of TE, there are various cases where a router ma= y
=0A>want to advertise a capability with different flooding scopes t= hus two
=0A>different opaque LSAs. For instance, a router may belong = to two
=0A>different meshes of TE LSPs, one local to its area (RI LSA= of Type 10)
=0A>one across the routing domain (RI LSA of Type 11). T= he same TLV
=0A>(automesh) is used, with different contents, carried = in different LSA
=0A>(type 10 and 11).
=0A>
=0A>Thanks.=0A>
=0A>JP.
=0A>
=0A>>Thanks,
=0A>>Acee=
=0A>>
=0A>>>
=0A>>>Thanks
=0A>>&= gt;Vivek
=0A>>>
=0A>>>
=0A>>>
=0A>= ;>>
=0A>>>
=0A>>>On Tue, 07 Dec 2004 Peter Ps= enak wrote :
=0A>>> >Vivek,
=0A>>> >
=0A&g= t;>> >Vivek Dubey wrote:
=0A>>> >>Hi,
=0A>= >> >>Section 2.3:
=0A>>> >>draft>TLV flood= ing scope rules will be specified on a per-TLV basis
=0A>>> >= ;>draft>If a type 11 opaque LSA is chosen, the originating router
= =0A>>>should
=0A>>> >>      also = advertise type 10 LSA(s) into any attached NSSA/stub area
=0A>>>= ; >>
=0A>>> >>vivek) If scope of TLV is defined to = be AS (Type 11), why should,
=0A>>>the
=0A>>> >&= gt;      originating router advertise type 10 LSA(s) into an= y
=0A>>> >>      attached NSSA/stub area ?= Idea seems to get the capabilities
=0A>>> >>   = ;   advertised to NSSA/STUB neighbors of originating router. But
= =0A>>> >>      what about NSSA/STUB areas att= ached not to "originating"
=0A>>> >>  &nbs= p;   routers??
=0A>>> >
=0A>>> >an analo= gy is when you have an ABR connected to backbone area and
=0A>>>= ;NSSA
=0A>>> >area and you redistribute routes from some ext= ernal source. ABR will
=0A>>> >generate Type-5 external LSA,= plus it can be configured to advertise
=0A>>> >Type-7 LSA t= o the NSSA area for the same prefix.
=0A>>> >If you have ano= ther ASBR somewhere in backbone area, Type-5 LSAs it
=0A>>> >= ;generates will not get propagated to NSSA area.
=0A>>> >=0A>>> >>
=0A>>> >>draft>An OSPF route= r MAY advertise different capabilities when both
=0A>>> >>= ;      NSSA/stub area type 10 LSA(s) and an AS scoped type 1= 1 opaque
=0A>>> >>      LSA is advertised.=
=0A>>> >>vivek> Capabilities here should map to diffe= rent TLV's ??
=0A>>> >
=0A>>> >I guess it can= be different TLVs or different content in the same
=0A>>>TLV.<= BR>=0A>>> >
=0A>>> >Peter
=0A>>> >= ;
=0A>>> >>
=0A>>> >>Thanks
=0A>&= gt;> >>Vivek
=0A>>> >>
=0A>>> >&g= t;
=0A>>> >>
=0A>>> >><http://client= s.rediff.com/signature/track_sig.asp>
=0A>>>
=0A>>&= gt;
=0A>>>
=0A>>><http://clients.rediff.com/sign= ature/track_sig.asp>
=0A>>
=0A=0A

=0A

=0A=0A --Next_1103274097---0-203.199.83.247-32382-- From owner-ospf@PEACH.EASE.LSOFT.COM Fri Dec 17 10:25:08 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id KAA27458 for ; Fri, 17 Dec 2004 10:25:07 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <17.00F13468@cherry.ease.lsoft.com>; Fri, 17 Dec 2004 10:25:05 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 49607642 for OSPF@PEACH.EASE.LSOFT.COM; Fri, 17 Dec 2004 10:25:03 -0500 Received: from 130.118.4.3 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Fri, 17 Dec 2004 10:25:03 -0500 Received: from omega7.wr.usgs.gov by omega7.wr.usgs.gov (PMDF V6.0-23 #41392) id <01LIHYN9FDOO000IEN@omega7.wr.usgs.gov> for OSPF@PEACH.EASE.LSOFT.COM; Fri, 17 Dec 2004 08:26:50 -0700 (PDT) X-VMS-To: OSPF@PEACH.EASE.LSOFT.COM X-VMS-Cc: PMURPHY MIME-version: 1.0 Content-type: TEXT/PLAIN; CHARSET=us-ascii Message-ID: <01LIHYN9FDOQ000IEN@omega7.wr.usgs.gov> Date: Fri, 17 Dec 2004 08:26:50 -0700 Reply-To: Mailing List Sender: Mailing List From: "Pat Murphy - (650)329-4044" Subject: Re: Type 7 LSA question To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list >In reviewing RFC 3101, the recommended configuration is to provide >control over the P LSA option bit when redistributing (aka importing) >external routes into an NSSA. There is no requirement on an implementation >to provide a way to set the forwarding address to 0 - although a non-zero >forwarding address is only required when the P bit is set. When the P-bit is clear RFC 3101 encourages that the forwarding address be set just as discussed in RFC 2328 Section 12.4.4.1 where it can indeed be 0. Picking a forwarding address from one of the NSSA's interfaces can result in inefficient forwarding. It was my hope that implementations would code it this way. When the P-bit is set a non-zero forwarding address must be picked from one of the NSSA's interfaces, as it is required for translation from Type 7 to Type 5. If an implemention uses the recommended approach a simple static route that points at an address external to the OSPF domain will result in a 0 forwarding address when it is redistributed into OSPF with the P-bit clear. RFC 3101 recommends that the default setting of the P-bit be clear (See Appendix A). Corporate OSPF backbone routing tables are a lot cleaner when the default setting of the P-bit is clear. This does require a means of toggling the P-bit via configuration. The intent to flood Type-7s into the full OSPF routing domain should always be a concious act given its potential adverse impact (See Appendix E). Pat From owner-ospf@PEACH.EASE.LSOFT.COM Sat Dec 18 14:29:50 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id OAA12783 for ; Sat, 18 Dec 2004 14:29:49 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <14.00F153E2@cherry.ease.lsoft.com>; Sat, 18 Dec 2004 14:29:49 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 49744055 for OSPF@PEACH.EASE.LSOFT.COM; Sat, 18 Dec 2004 14:29:35 -0500 Received: from 64.102.122.149 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Sat, 18 Dec 2004 14:29:35 -0500 Received: from rtp-core-2.cisco.com (64.102.124.13) by rtp-iport-2.cisco.com with ESMTP; 18 Dec 2004 14:29:35 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-2.cisco.com (8.12.10/8.12.6) with ESMTP id iBIJTW9E014125 for ; Sat, 18 Dec 2004 14:29:33 -0500 (EST) Received: from [192.168.2.6] (rtp-vpn1-531.cisco.com [10.82.226.19]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BEC47754; Sat, 18 Dec 2004 11:29:32 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <20041217090137.32386.qmail@mailweb34.rediffmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41C4851C.9090804@cisco.com> Date: Sat, 18 Dec 2004 14:29:32 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: draft-ietf-ospf-cap-04.txt To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <20041217090137.32386.qmail@mailweb34.rediffmail.com> Precedence: list Content-Transfer-Encoding: 7bit Hi Vivek, Independent of the capabilities LSA application, I don't see why a router couldn't have different capabilities in different areas dependent on configuration or policy. What do you see wrong with this? Speaking as work group member, Acee Vivek Dubey wrote: > JP, > Comments inlined: > > Indeed. In the case of TE, there are various cases where a router may > want to advertise a capability with different flooding scopes thus two > different opaque LSAs. For instance, a router may belong to two > different meshes of TE LSPs, one local to its area (RI LSA of Type 10) > one across the routing domain (RI LSA of Type 11). > > vivek> If i understand correctly you are referring to the case when > router has attached NSSA/STUB area's, otherwise RI LSA of Type 11, > would suffice. > > The same TLV (automesh) is used, with different contents, carried in > different LSA (type 10 and 11). > > vivek> Why same TLV is required to carry different contents in > different scoped LSAs. What if same contents are carried in both Type > 10 and Type 11 RI opaque LSAs. Are we intending to hide some > information across different OSPF flooding scopes ? Since router's > capability is independent of "Flooding Scopes", that should not be the > case. > > Thanks > Vivek > > > > > On Wed, 08 Dec 2004 JP Vasseur wrote : > >Hi Vivek, > > > >On Dec 7, 2004, at 5:16 PM, Acee Lindem wrote: > > > >>Hi Vivek, > >> > >> > >>Vivek Dubey wrote: > >> > >>>Peter, > >>> > >>>1) In case of ABR analogy, the information was directly relevant to > >>> OSPF routing and even than it was provided as configuration option, > >>> not a "should" condition. > >>> > >>I think the configuration option is implementation specific. Although > >>it is > >>not covered explicitly I think RFC 3103 implies an ABR will > >>redistribute > >>into both attached NSSAs and regular areas. > >> > >> > >>> > >>> Here, OSPF RI Opaque LSA is used for both: > >>> a) Advertising router's OSPF capabilities (TLV 1) > >>> b) Capablities Opaque to OSPF (Any future TLVs defined) > >>> > >>> And since flooding scope is per TLV and depends on local policy, > >>> there should be no dependency on Type's of area configured at OSPF > >>> level. > >>> > >>>2) > >>>draft>An OSPF router MAY advertise different capabilities when both > >>> NSSA/stub area type 10 LSA(s) and an AS scoped type 11 opaque > >>> LSA is advertised. > >>>vivek> Capabilities here should map to different TLV's ?? > >>> > >>>Peter>I guess it can be different TLVs or different content in the > >>>same TLV. > >>> > >>>vivek> Different content in same TLV, advertised in different scoped > >>> LSAs (Type 10 and Type 11). Doesnt seems a good idea to me. > >>> Any possible scenarios? > >>> > >>JP - can you take a shot at this? I seem to remember that you had a > >>scenario in minde. > >> > > > >Indeed. In the case of TE, there are various cases where a router may > >want to advertise a capability with different flooding scopes thus two > >different opaque LSAs. For instance, a router may belong to two > >different meshes of TE LSPs, one local to its area (RI LSA of Type 10) > >one across the routing domain (RI LSA of Type 11). The same TLV > >(automesh) is used, with different contents, carried in different LSA > >(type 10 and 11). > > > >Thanks. > > > >JP. > > > >>Thanks, > >>Acee > >> > >>> > >>>Thanks > >>>Vivek > >>> > >>> > >>> > >>> > >>> > >>>On Tue, 07 Dec 2004 Peter Psenak wrote : > >>> >Vivek, > >>> > > >>> >Vivek Dubey wrote: > >>> >>Hi, > >>> >>Section 2.3: > >>> >>draft>TLV flooding scope rules will be specified on a per-TLV basis > >>> >>draft>If a type 11 opaque LSA is chosen, the originating router > >>>should > >>> >> also advertise type 10 LSA(s) into any attached NSSA/stub area > >>> >> > >>> >>vivek) If scope of TLV is defined to be AS (Type 11), why should, > >>>the > >>> >> originating router advertise type 10 LSA(s) into any > >>> >> attached NSSA/stub area ? Idea seems to get the capabilities > >>> >> advertised to NSSA/STUB neighbors of originating router. But > >>> >> what about NSSA/STUB areas attached not to "originating" > >>> >> routers?? > >>> > > >>> >an analogy is when you have an ABR connected to backbone area and > >>>NSSA > >>> >area and you redistribute routes from some external source. ABR will > >>> >generate Type-5 external LSA, plus it can be configured to advertise > >>> >Type-7 LSA to the NSSA area for the same prefix. > >>> >If you have another ASBR somewhere in backbone area, Type-5 LSAs it > >>> >generates will not get propagated to NSSA area. > >>> > > >>> >> > >>> >>draft>An OSPF router MAY advertise different capabilities when both > >>> >> NSSA/stub area type 10 LSA(s) and an AS scoped type 11 opaque > >>> >> LSA is advertised. > >>> >>vivek> Capabilities here should map to different TLV's ?? > >>> > > >>> >I guess it can be different TLVs or different content in the same > >>>TLV. > >>> > > >>> >Peter > >>> > > >>> >> > >>> >>Thanks > >>> >>Vivek > >>> >> > >>> >> > >>> >> > >>> >> > >>> > >>> > >>> > >>> > >> > > > From owner-ospf@PEACH.EASE.LSOFT.COM Mon Dec 20 08:39:59 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id IAA28034 for ; Mon, 20 Dec 2004 08:39:59 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <11.00F17749@cherry.ease.lsoft.com>; Mon, 20 Dec 2004 8:39:58 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 49975387 for OSPF@PEACH.EASE.LSOFT.COM; Mon, 20 Dec 2004 08:39:50 -0500 Received: from 204.176.140.238 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Mon, 20 Dec 2004 08:39:50 -0500 Received: from manikantan (dsl-TN-099.240.247.61.touchtelindia.net [61.247.240.99] (may be forged)) (authenticated bits=0) by mail2.webindia.com (8.13.1/8.13.1) with ESMTP id iBKDdb2P012423 for ; Mon, 20 Dec 2004 05:39:45 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook, Build 11.0.5510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Thread-Index: AcTj6cvXOJAmmMHKQsGCbvg+3+M0fgCr11xQ X-IBIS-MailScanner-Information: Please contact the ISP for more information X-IBIS-MailScanner: Found to be clean X-MailScanner-From: manis@net-o2.com Message-ID: <200412201339.iBKDdb2P012423@mail2.webindia.com> Date: Mon, 20 Dec 2004 19:10:00 +0530 Reply-To: Mailing List Sender: Mailing List From: Manikantan Srinivasan Organization: Net-O2 Technologies Subject: Re: Clarification related to Flooding an LSA by DR Other on its received interface To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <41C244ED.5000007@cisco.com> Precedence: list Content-Transfer-Encoding: 7bit Hello Acee Good day to you. Thanks for your reply. Apologize for the delay and sorry for my mails being less informative regarding my test topology. I hope I have detailed them now :) In an attempt to create a set of cases, that can test an OSPF implementation conformance to OSPF RFCs, I have defined a test case for Section 13.3 Bullet 3 (Page 150) in RFC 2328 For Quick reference the section is placed below ----------- (3) If the new LSA was received on this interface, and it was received from either the Designated Router or the Backup Designated Router, chances are that all the neighbors have received the LSA already. Therefore, examine the next interface. ------------- I have a defined a test topology as shown below ############################################################################ ### # Test Setup : # # # # TEE DUT # # __________ __________ # # | _____ | | | # # | | | | | | # # I2 -----| RT1 |-||I1 | | # # | |_____| || | | # # | || | | # # | |-----------------------------| RT2 | # # | ....... || (I1,BB) | | # # | : : || | | # # | : SR1 :-|| | | # # | :.....: | | | # # |__________| |__________| # # # # (Router IDs) SR1_ID < RT1_ID < (RT2_ID = 0 # # (Router Priorities) RT1_I1_PRY > SR1_I1_PRY > RT2_I1_PRY # # # ############################################################################ ### As test steps, 1) The needful PDUs from RT1 are generated and full adjacency is established with RT2 (At this point I1 is the only interface enabled at RT1) 2) The needful PDUs from SR1 are generated and full adjacency is established with RT2 (Since RT1 and SR1 are nodes handled by my test software, I don't explicitly enable adjacency between RT1 and SR1) 3) I2 is enabled at RT1, which enables RT1 to generate a new Router LSA. RT2 being a DROther should not propagate back the LSA on the received interface. In my test setup, the RT2 (DUT) propagates back the received new LSA. When I create a topology using 3 DUTs (not my test software) I notice the DR_Other does not propagate the received LSA. I have to spend some more time with my test steps. I will keep you and the mailing list posted as soon as I figure out and fix my bug :) Thank you for your valuable time. Best regards Mani # -----Original Message----- # From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On # Behalf Of Acee Lindem # Sent: Friday, December 17, 2004 8:01 AM # To: OSPF@PEACH.EASE.LSOFT.COM # Subject: Re: Clarification related to Flooding an LSA by DR # Other on its received interface # # Mani, # I don't think you've given enough information to conclude # whether the routers under test behave precisely as described # in section 13 of RFC 2328. # # 1) Where did the DR get the LSA it is flooding? # Specifically, was it # self-originated, received from another router on # the broadcast network, # or received on a different interface? # 2) If it was received from another router on the # broadcast network, # which one? Is it the same one that you are # observing unicasting # to the BDR? # # Note that it would be better to preform this test without any # other OSPF links between the routers on the broadcast network. # # Acee # # # # # Manikantan Srinivasan wrote: # # >Hello Acee # > # >Thank you for your reply. # > # >In my tests I notice the BDR generating an acknowledgement # for the LS # >Update sent from DR_Other Router with unicast source address # of the BDR. # > # >Since Acknowledgement is generated, can I conclude the DR other # >implementation as acceptable. # > # >Secondly will it be acceptable :) to conclude - When a DR_Other # >receives an LS Update from DR or BDR, it MAY flood it back on the # >received interface to DR/BDR as an unicast (addressed to DR/BDR) . # > # >Thanks again # > # >Best regards # >mani # > # > # ># -----Original Message----- # ># From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On # # Behalf Of # >Acee Lindem # Sent: Monday, December 06, 2004 9:08 AM # To: # >OSPF@PEACH.EASE.LSOFT.COM # Subject: Re: Clarification related to # >Flooding an LSA by DR # Other on its received interface # # # Manikantan # >Srinivasan wrote: # ># # ># >Hello # ># > # ># >Good day to you. # ># > # ># >I have the following doubt/question. # ># > # ># >As per Sec 13.3 Bullet 3 (Page 150) RFC 2328, # > # ># > (3) If the new LSA was received on this # interface, and it was # ># > received from either the Designated Router or # the Backup # ># > Designated Router, chances are that all the # ># neighbors have # ># > received the LSA already. Therefore, examine the next # ># > interface. # ># > # ># >I understand, when a DR other (Router 1) receives an LSA # from a DR # # >>(Router 2), Router 1 will skip flooding back the received # # LSA back # >in # >the received interface. # ># > # ># >1) Is this a "SHOULD" condition, i.e DR Other SHOULD not # # flood the # >LSA back? # ># >Or # ># > # ># >2) can (DR Other) MAY flood the LSA over the received # # interface? # >If so # >what should be the destination address? # ># > # ># >3) I notice few (atleast 2) implementations (when the DUT is # DR # >Other), # >the LSA received from DR is flooded back on the # received # # >interface, as # >a unicast packet addressed to BDR. Is this # a valid # # >>condition/implementation? IS this behavior a "SHOULD" condition? # ># > # ># > # ># Hi Mani, # ># # ># I've re-read RFC 2328 and unfortunately the broadcast network # # >flooding is complex and not all that clear. What I suspect is # # >happening is that the DR-other router is adding the new LSA # to its # >retransmission list and retransmitting when the timer # # expires. Based # >on RFC 2328, this is correct. However, section # 13.5 is somewhat # >unclear on whether or not the BDR should # send a delayed # >acknowledgement. I think that it should since # the BDR is NOT the # >router that re-flooded the LSA out the # receiving interface (as # >determined in section 13, step 5b) - # even though the BDR # knows that # >the DR is reflooding it out # the receiving interface. # ># Consequently, the first thing I would check before # suspecting # two # >separate DR-other implementations is whether or not the # BDR is # >sending the delayed acknowledgement. If it is not, # then it is the # >implementation that is culpable. # ># # ># Other opinions are welcome. # ># # ># Thanks, # ># Acee # ># # ># >Thanks in advance # ># > # ># >With best regards # ># >Mani # ># > # ># > # ># > # > # > # > From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 21 04:10:29 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id EAA17786 for ; Tue, 21 Dec 2004 04:10:28 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <1.00F18E17@cherry.ease.lsoft.com>; Tue, 21 Dec 2004 4:10:28 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 50073972 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 21 Dec 2004 04:10:27 -0500 Received: from 61.144.161.54 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 21 Dec 2004 04:10:26 -0500 Received: from huawei.com (szxga02-in [172.24.2.6]) by szxga02-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 1.25 (built Mar 3 2004)) with ESMTP id <0I92002QBEKYAX@szxga02-in.huawei.com> for OSPF@PEACH.EASE.LSOFT.COM; Tue, 21 Dec 2004 17:05:22 +0800 (CST) Received: from szxml01-in ([172.24.1.3]) by szxga02-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 1.25 (built Mar 3 2004)) with ESMTP id <0I9200HXTEKXDC@szxga02-in.huawei.com> for OSPF@PEACH.EASE.LSOFT.COM; Tue, 21 Dec 2004 17:05:21 +0800 (CST) Received: from NitinKCL7064 ([10.18.4.174]) by szxml01-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 1.25 (built Mar 3 2004)) with ESMTPA id <0I9200B0MEP3Z4@szxml01-in.huawei.com> for OSPF@PEACH.EASE.LSOFT.COM; Tue, 21 Dec 2004 17:07:53 +0800 (CST) MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2911.0) Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 7BIT Importance: Normal X-Priority: 3 (Normal) X-MSMail-priority: Normal Message-ID: <000701c4e73d$12e44e70$ae04120a@in.huawei.com> Date: Tue, 21 Dec 2004 14:41:36 +0530 Reply-To: Mailing List Sender: Mailing List From: Nitin Kakkar Subject: Vlink Question To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <41C4851C.9090804@cisco.com> Precedence: list Content-Transfer-Encoding: 7BIT Hello, I have a vlink related question. Please consider the following topology. Two routers (RTA & RTB) have two interfaces connected between them. A VLINK is configured between RTA & RTB. Initially the interface cost of e1 was 1000 and interface cost of e0 was 100. So while establishing VLINK the interface e0 was chosen as outgoing interface. vlink with area 1 as the transit ******************************** cost 100 e0 e0 area 1 ------------------------------- RTA RTB ------------------------------- area 1 e1 e1 cost 1000 Now the cost of interface e1 has been changed from 1000 to 1. So now it offers the best out going interface for VLINK. To update the VLINK and change the out going interface to e0. should we 1) Bring down the VLINK & Bring it UP again. 2) Should we flush LSA's previously originated while establishing VLINK over interface e0 3) Is there any mechanism defined to switch over VLINK interface. Thanks & Regards Nitin From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 21 05:28:17 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id FAA23615 for ; Tue, 21 Dec 2004 05:28:16 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <11.00F18DA9@cherry.ease.lsoft.com>; Tue, 21 Dec 2004 5:28:13 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 50077029 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 21 Dec 2004 05:28:09 -0500 Received: from 61.144.161.55 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 21 Dec 2004 05:27:57 -0500 Received: from huawei.com (szxga03-in [172.24.2.9]) by szxga03-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 1.25 (built Mar 3 2004)) with ESMTP id <0I9200EKNID9VM@szxga03-in.huawei.com> for OSPF@PEACH.EASE.LSOFT.COM; Tue, 21 Dec 2004 18:27:09 +0800 (CST) Received: from szxml02-in ([172.24.1.6]) by szxga03-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 1.25 (built Mar 3 2004)) with ESMTP id <0I9200JFLID9U2@szxga03-in.huawei.com> for OSPF@PEACH.EASE.LSOFT.COM; Tue, 21 Dec 2004 18:27:09 +0800 (CST) Received: from dell60 ([10.18.4.207]) by szxml02-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 1.25 (built Mar 3 2004)) with ESMTPA id <0I92009EYIEUVA@szxml02-in.huawei.com> for OSPF@PEACH.EASE.LSOFT.COM; Tue, 21 Dec 2004 18:28:07 +0800 (CST) MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Mailer: Microsoft Outlook, Build 10.0.4024 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT Importance: Normal X-Priority: 3 (Normal) X-MSMail-priority: Normal Message-ID: <000001c4e748$a54f0f60$cf04120a@in.huawei.com> Date: Tue, 21 Dec 2004 16:04:25 +0530 Reply-To: Mailing List Sender: Mailing List From: sujay Subject: Re: Vlink Question To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <000701c4e73d$12e44e70$ae04120a@in.huawei.com> Precedence: list Content-Transfer-Encoding: 7BIT 1. Maybe there is no need to get the VLINK down, as the VLINK NBR is still reachable albeit thru another interface. 2. We should flush the LSA and flood the correct router lsa else the vlink nbr reachability cost is wrong. Regds, ~Sujay -----Original Message----- From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On Behalf Of Nitin Kakkar Sent: Tuesday, December 21, 2004 2:42 PM To: OSPF@PEACH.EASE.LSOFT.COM Subject: Vlink Question Hello, I have a vlink related question. Please consider the following topology. Two routers (RTA & RTB) have two interfaces connected between them. A VLINK is configured between RTA & RTB. Initially the interface cost of e1 was 1000 and interface cost of e0 was 100. So while establishing VLINK the interface e0 was chosen as outgoing interface. vlink with area 1 as the transit ******************************** cost 100 e0 e0 area 1 ------------------------------- RTA RTB ------------------------------- area 1 e1 e1 cost 1000 Now the cost of interface e1 has been changed from 1000 to 1. So now it offers the best out going interface for VLINK. To update the VLINK and change the out going interface to e0. should we 1) Bring down the VLINK & Bring it UP again. 2) Should we flush LSA's previously originated while establishing VLINK over interface e0 3) Is there any mechanism defined to switch over VLINK interface. Thanks & Regards Nitin From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 21 05:52:03 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id FAA24593 for ; Tue, 21 Dec 2004 05:52:02 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <3.00F18E1A@cherry.ease.lsoft.com>; Tue, 21 Dec 2004 5:52:02 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 50077694 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 21 Dec 2004 05:52:01 -0500 Received: from 64.233.184.196 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 21 Dec 2004 05:42:01 -0500 Received: by wproxy.gmail.com with SMTP id 71so370143wra for ; Tue, 21 Dec 2004 02:42:01 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:references; b=dqZBSKQdUkQ6SFsIQFs2pL4oK5YOYbtDLd9qrr3a3xElAix45OSqQd1oHF/5sqAoUl9CZ8krH8j9h8TkFTmQueT+/Xns82T8XoaCHnteRiA/U30GcdMD5Uc3wBMGrJjhk4J+6Gdcx6clwBRVjPi73Y4yM1GT1jBPDQkmOAHPCb8= Received: by 10.54.52.77 with SMTP id z77mr349012wrz; Tue, 21 Dec 2004 02:42:01 -0800 (PST) Received: by 10.54.13.23 with HTTP; Tue, 21 Dec 2004 02:42:00 -0800 (PST) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit References: <41C4851C.9090804@cisco.com> <000701c4e73d$12e44e70$ae04120a@in.huawei.com> Message-ID: Date: Tue, 21 Dec 2004 16:12:00 +0530 Reply-To: Mailing List Sender: Mailing List From: Santosh Esale Subject: Re: Vlink Question To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <000701c4e73d$12e44e70$ae04120a@in.huawei.com> Precedence: list Content-Transfer-Encoding: 7bit Hi nitin, In ospfv3, I guess thier is no need to bring down the adjacency, only re-orginate the router-lsa. More comments expected . The process may occur as follow ---------------------------------------------- Destination ipv6 addresses for a vlink has been set to the FIRST prefix encountered having the "LA-bit" set(either of e0 or e1's ipv6 address/128, with next-hop to e0 in first case ),Now when the cost is changed, SPF will change the next-hop of vlink to e1 while calculating transit areas' summary-LSAs,and hence the unicats hello's on vlink will use the next-hop address of e1 instead of e0,as well the interface id(which has been allocated to vlink) is same, only the virtual(p2p) link cost has been changed betw RTA and RTB, hence re-orginate the router-lsa and trigger SPF.why to bring down the adjaceny and bring up ? regards Santosh On Tue, 21 Dec 2004 14:41:36 +0530, Nitin Kakkar wrote: > Hello, > I have a vlink related question. Please consider the following topology. > Two routers (RTA & RTB) have two interfaces connected between them. A VLINK > is configured between RTA & RTB. Initially the interface cost of e1 was 1000 > and interface cost of e0 was 100. So while establishing VLINK the interface > e0 was chosen as outgoing interface. > > vlink with area 1 as the transit > ******************************** > cost 100 > e0 e0 > area 1 > ------------------------------- > RTA RTB > ------------------------------- > area 1 > e1 e1 > cost 1000 > > Now the cost of interface e1 has been changed from 1000 to 1. So now it > offers the best out going interface for VLINK. > To update the VLINK and change the out going interface to e0. should we > 1) Bring down the VLINK & Bring it UP again. > 2) Should we flush LSA's previously originated while establishing VLINK over > interface e0 > 3) Is there any mechanism defined to switch over VLINK interface. > > Thanks & Regards > Nitin > From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 21 06:46:00 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id GAA28457 for ; Tue, 21 Dec 2004 06:45:59 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <20.00F1900B@cherry.ease.lsoft.com>; Tue, 21 Dec 2004 6:45:58 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 50110316 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 21 Dec 2004 06:45:39 -0500 Received: from 61.11.119.134 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 21 Dec 2004 06:45:39 -0500 content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-MimeOLE: Produced By Microsoft Exchange V6.0.6603.0 Thread-Topic: Vlink Question Thread-Index: AcTnPPX3vueU6C6qTM+ELFD4T12U/wAFLU5w Message-ID: <36993D449C7FA647BF43568E0793AB3E010D6A86@nevis_pune_xchg.pune.nevisnetworks.com> Date: Tue, 21 Dec 2004 17:15:36 +0530 Reply-To: Mailing List Sender: Mailing List From: Naresh Paliwal Subject: Re: Vlink Question To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: quoted-printable Nitin, Every Virtual link belongs to Backbone, and when the cost of a virtual link changes, a new router-LSA should be originated for the backbone area.=20 This should be enough to convey the change to other routers. There is no need to MaxAge the last LSA, the INCREASED SEQUENCE NUMBER should be enough to solve the purpose. And as far as I know, none of the implementation manually allows to choose/switch the virtual-link interface. Regards -Naresh -----Original Message----- From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On Behalf Of Nitin Kakkar Sent: Tuesday, December 21, 2004 2:42 PM To: OSPF@PEACH.EASE.LSOFT.COM Subject: Vlink Question Hello, I have a vlink related question. Please consider the following topology. Two routers (RTA & RTB) have two interfaces connected between them. A VLINK is configured between RTA & RTB. Initially the interface cost of e1 was 1000 and interface cost of e0 was 100. So while establishing VLINK the interface e0 was chosen as outgoing interface. vlink with area 1 as the transit ******************************** cost 100 e0 e0 area 1 ------------------------------- RTA RTB ------------------------------- area 1 e1 e1 cost 1000 Now the cost of interface e1 has been changed from 1000 to 1. So now it offers the best out going interface for VLINK. To update the VLINK and change the out going interface to e0. should we 1) Bring down the VLINK & Bring it UP again. 2) Should we flush LSA's previously originated while establishing VLINK over interface e0 3) Is there any mechanism defined to switch over VLINK interface. Thanks & Regards Nitin From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 21 06:46:12 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id GAA28480 for ; Tue, 21 Dec 2004 06:46:09 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <11.00F19036@cherry.ease.lsoft.com>; Tue, 21 Dec 2004 6:46:07 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 50110377 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 21 Dec 2004 06:46:06 -0500 Received: from 63.113.148.10 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 21 Dec 2004 06:46:05 -0500 Received: from mgate1.riverstonenet.com by riverstonenet.com (8.9.3+Sun/SMI-SVR4-Yago) id DAA16175; Tue, 21 Dec 2004 03:46:04 -0800 (PST) Received: (from daemon@localhost) by mgate1.riverstonenet.com (8.13.1/8.13.1) id iBLBk4p9016670; Tue, 21 Dec 2004 03:46:04 -0800 (PST) X-Authentication-Warning: mgate1.riverstonenet.com: Processed by daemon with -C /etc/mail/sendmail-simple.cf Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by mgate1.riverstonenet.com (8.13.1/8.13.1) with ESMTP id iBLBk1E0016653 for ; Tue, 21 Dec 2004 03:46:03 -0800 (PST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <20.00F1900B@cherry.ease.lsoft.com>; Tue, 21 Dec 2004 6:45:58 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 50110316 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 21 Dec 2004 06:45:39 -0500 Received: from 61.11.119.134 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 21 Dec 2004 06:45:39 -0500 content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-MimeOLE: Produced By Microsoft Exchange V6.0.6603.0 Thread-Topic: Vlink Question Thread-Index: AcTnPPX3vueU6C6qTM+ELFD4T12U/wAFLU5w Precedence: list X-Spam-Status: No, score=0.0 required=4.0 tests=none autolearn=failed version=3.0.1 X-Spam-Checker-Version: SpamAssassin 3.0.1 (2004-10-22) on mgate1.riverstonenet.com Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mgate1.riverstonenet.com id iBLBk1E0016653 Message-ID: <36993D449C7FA647BF43568E0793AB3E010D6A86@nevis_pune_xchg.pune.nevisnetworks.com> Date: Tue, 21 Dec 2004 17:15:36 +0530 Reply-To: Mailing List Sender: Mailing List From: Naresh Paliwal Subject: Re: Vlink Question To: OSPF@PEACH.EASE.LSOFT.COM Content-Transfer-Encoding: 8bit Nitin, Every Virtual link belongs to Backbone, and when the cost of a virtual link changes, a new router-LSA should be originated for the backbone area. This should be enough to convey the change to other routers. There is no need to MaxAge the last LSA, the INCREASED SEQUENCE NUMBER should be enough to solve the purpose. And as far as I know, none of the implementation manually allows to choose/switch the virtual-link interface. Regards -Naresh -----Original Message----- From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM] On Behalf Of Nitin Kakkar Sent: Tuesday, December 21, 2004 2:42 PM To: OSPF@PEACH.EASE.LSOFT.COM Subject: Vlink Question Hello, I have a vlink related question. Please consider the following topology. Two routers (RTA & RTB) have two interfaces connected between them. A VLINK is configured between RTA & RTB. Initially the interface cost of e1 was 1000 and interface cost of e0 was 100. So while establishing VLINK the interface e0 was chosen as outgoing interface. vlink with area 1 as the transit ******************************** cost 100 e0 e0 area 1 ------------------------------- RTA RTB ------------------------------- area 1 e1 e1 cost 1000 Now the cost of interface e1 has been changed from 1000 to 1. So now it offers the best out going interface for VLINK. To update the VLINK and change the out going interface to e0. should we 1) Bring down the VLINK & Bring it UP again. 2) Should we flush LSA's previously originated while establishing VLINK over interface e0 3) Is there any mechanism defined to switch over VLINK interface. Thanks & Regards Nitin From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 21 22:07:49 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id WAA11504 for ; Tue, 21 Dec 2004 22:07:49 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <16.00F1A0C6@cherry.ease.lsoft.com>; Tue, 21 Dec 2004 22:07:46 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 50193753 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 21 Dec 2004 22:07:44 -0500 Received: from 64.47.51.130 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 21 Dec 2004 22:07:44 -0500 Received: from dgoodspeedpc ([172.22.184.130] unverified) by exchange.timetra.com with Microsoft SMTPSVC(5.0.2195.6713); Tue, 21 Dec 2004 19:07:40 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.6604 (9.0.2911.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 X-OriginalArrivalTime: 22 Dec 2004 03:07:40.0299 (UTC) FILETIME=[65AA45B0:01C4E7D3] Message-ID: <006c01c4e7d3$67c1b400$f703a8c0@eng.timetra.com> Date: Tue, 21 Dec 2004 19:07:42 -0800 Reply-To: Mailing List Sender: Mailing List From: Don Goodspeed Subject: MIB Update still stuck at revision 8 To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: 7bit All, I believe my last round of comments were mostly included in drafts 7 and 8, and nothing new has been presented on the list in months, so can we push this update forward? Thanks, Don From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 22 07:29:53 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id HAA17322 for ; Wed, 22 Dec 2004 07:29:52 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <13.00F1AEA3@cherry.ease.lsoft.com>; Wed, 22 Dec 2004 7:29:48 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 50268571 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 22 Dec 2004 07:29:43 -0500 Received: from 64.102.122.148 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Wed, 22 Dec 2004 07:29:43 -0500 Received: from rtp-core-1.cisco.com (64.102.124.12) by rtp-iport-1.cisco.com with ESMTP; 22 Dec 2004 07:38:50 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-1.cisco.com (8.12.10/8.12.6) with ESMTP id iBMCTeEu016345 for ; Wed, 22 Dec 2004 07:29:41 -0500 (EST) Received: from [10.82.242.84] (rtp-vpn2-596.cisco.com [10.82.242.84]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BEE28517; Wed, 22 Dec 2004 04:29:40 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <006c01c4e7d3$67c1b400$f703a8c0@eng.timetra.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41C968B3.60006@cisco.com> Date: Wed, 22 Dec 2004 07:29:39 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: MIB Update still stuck at revision 8 To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <006c01c4e7d3$67c1b400$f703a8c0@eng.timetra.com> Precedence: list Content-Transfer-Encoding: 7bit Don Goodspeed wrote: >All, > >I believe my last round of comments were mostly included in drafts 7 and 8, >and nothing new has been presented on the list in months, so can we push >this update forward? > > Hi Don, The MIB update has been through WG last call and is the process of AD review. It has grown to quite a large document and represents a large review effort. I'll check on the status. Thanks, Acee >Thanks, >Don > > > From owner-ospf@PEACH.EASE.LSOFT.COM Fri Dec 24 05:02:45 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id FAA01794 for ; Fri, 24 Dec 2004 05:02:45 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <13.00F1E139@cherry.ease.lsoft.com>; Fri, 24 Dec 2004 5:02:43 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 50502442 for OSPF@PEACH.EASE.LSOFT.COM; Fri, 24 Dec 2004 05:02:25 -0500 Received: from 204.176.140.238 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Fri, 24 Dec 2004 05:02:24 -0500 Received: from manikantan (dsl-TN-211.240.247.61.touchtelindia.net [61.247.240.211] (may be forged)) (authenticated bits=0) by mail2.webindia.com (8.13.1/8.13.1) with ESMTP id iBOA2cMl010724 for ; Fri, 24 Dec 2004 02:02:43 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: AcTj6cvXOJAmmMHKQsGCbvg+3+M0fgCr11xQAL8OEOA= X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-IBIS-MailScanner-Information: Please contact the ISP for more information X-IBIS-MailScanner: Found to be clean X-MailScanner-From: manis@net-o2.com Message-ID: <200412241002.iBOA2cMl010724@mail2.webindia.com> Date: Fri, 24 Dec 2004 15:32:40 +0530 Reply-To: Mailing List Sender: Mailing List From: Manikantan Srinivasan Organization: Net-O2 Technologies Subject: Issue fixed RE: Clarification related to Flooding an LSA by DR Other on its received interface To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: 7bit Hello Acee, Good day to you The bug in my test steps has been identified and fixed. The DR_Other implementation was performing the action as per Section 13.3 bullet 1 sub bullet d. i.e the DR_Other added the LSA update from DR to the BDR's retransmission list. =============== (d) At this point we are not positive that the neighbor has an up-to-date instance of this new LSA. Add the new LSA to the Link state retransmission list for the adjacency. This ensures that the flooding procedure is reliable; the LSA will be retransmitted at intervals until an acknowledgment is seen from the neighbor. ================= In my test steps, I had skipped sending the ack from BDR for the update transmitted from the DR. This was causing the LSA to be retransmitted from the DR_Other. When my test steps included the generation of LS Ack from BDR for the update from DR, The DR_other does not forward the packet. Thank you Best regards mani From owner-ospf@PEACH.EASE.LSOFT.COM Fri Dec 24 12:24:46 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id MAA00162 for ; Fri, 24 Dec 2004 12:24:45 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <3.00F1ECC3@cherry.ease.lsoft.com>; Fri, 24 Dec 2004 12:24:41 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 50559768 for OSPF@PEACH.EASE.LSOFT.COM; Fri, 24 Dec 2004 12:24:40 -0500 Received: from 64.102.122.149 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Fri, 24 Dec 2004 12:24:40 -0500 Received: from rtp-core-2.cisco.com (64.102.124.13) by rtp-iport-2.cisco.com with ESMTP; 24 Dec 2004 12:24:40 -0500 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== Received: from fruitpie.cisco.com (IDENT:mirapoint@fruitpie.cisco.com [64.102.16.27]) by rtp-core-2.cisco.com (8.12.10/8.12.6) with ESMTP id iBOHOcgE011708 for ; Fri, 24 Dec 2004 12:24:39 -0500 (EST) Received: from [10.82.240.125] (rtp-vpn2-125.cisco.com [10.82.240.125]) by fruitpie.cisco.com (MOS 3.4.6-GR) with ESMTP id BEF47580; Fri, 24 Dec 2004 09:24:36 -0800 (PST) User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <200412241002.iBOA2cMl010724@mail2.webindia.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <41CC50D4.5060102@cisco.com> Date: Fri, 24 Dec 2004 12:24:36 -0500 Reply-To: Mailing List Sender: Mailing List From: Acee Lindem Subject: Re: Issue fixed RE: Clarification related to Flooding an LSA by DR Other on its received interface To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <200412241002.iBOA2cMl010724@mail2.webindia.com> Precedence: list Content-Transfer-Encoding: 7bit Hi Mani, I'd expected it might be a problem with the BDR since it has the most complex role with respect to reliable flooding on broadcast networks. Also, the RFC is confusing with respect to 13 (5)(b) and "flooding out the receiving interface". The BDR may be aware that the DR has flooded the LSA back out the receiving interface yet it should NOT note this fact for the acknowledgement processing described in the table in section 13.5. Good Luck in the New Year, Acee Manikantan Srinivasan wrote: >Hello Acee, > >Good day to you > >The bug in my test steps has been identified and fixed. > >The DR_Other implementation was performing the action as per Section 13.3 >bullet 1 sub bullet d. i.e the DR_Other added the LSA update from DR to the >BDR's retransmission list. > >=============== > >(d) At this point we are not positive that the neighbor has > an up-to-date instance of this new LSA. Add the new LSA > to the Link state retransmission list for the adjacency. > This ensures that the flooding procedure is reliable; > the LSA will be retransmitted at intervals until an > acknowledgment is seen from the neighbor. >================= > >In my test steps, I had skipped sending the ack from BDR for the update >transmitted from the DR. This was causing the LSA to be retransmitted from >the DR_Other. > >When my test steps included the generation of LS Ack from BDR for the update >from DR, The DR_other does not forward the packet. > >Thank you > >Best regards >mani > > > > From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 28 00:08:42 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id AAA08932 for ; Tue, 28 Dec 2004 00:08:41 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <21.00F25913@cherry.ease.lsoft.com>; Tue, 28 Dec 2004 0:08:41 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 50943061 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 28 Dec 2004 00:08:39 -0500 Received: from 61.144.161.55 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Tue, 28 Dec 2004 00:05:16 -0500 Received: from huawei.com (szxga03-in [172.24.2.9]) by szxga03-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 1.25 (built Mar 3 2004)) with ESMTP id <0I9F00DF122V1R@szxga03-in.huawei.com> for OSPF@PEACH.EASE.LSOFT.COM; Tue, 28 Dec 2004 13:04:07 +0800 (CST) Received: from szxml01-in ([172.24.1.3]) by szxga03-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 1.25 (built Mar 3 2004)) with ESMTP id <0I9F00FHK22VRO@szxga03-in.huawei.com> for OSPF@PEACH.EASE.LSOFT.COM; Tue, 28 Dec 2004 13:04:07 +0800 (CST) Received: from KSProsonna ([10.18.4.183]) by szxml01-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 1.25 (built Mar 3 2004)) with ESMTPA id <0I9F00EL228UPP@szxml01-in.huawei.com> for OSPF@PEACH.EASE.LSOFT.COM; Tue, 28 Dec 2004 13:07:43 +0800 (CST) MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Mailer: Microsoft Outlook, Build 10.0.3416 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT Importance: Normal X-Priority: 3 (Normal) X-MSMail-priority: Normal Message-ID: Date: Tue, 28 Dec 2004 10:41:16 +0530 Reply-To: Mailing List Sender: Mailing List From: prasanna Organization: huawei Subject: Which route is seleted when two process learn the same route over same link To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: <41CC50D4.5060102@cisco.com> Precedence: list Content-Transfer-Encoding: 7BIT Hi all I have small doubt. Consider the following topology Area 1 Area 1 RTA-------RTB----------+ 2000:BBBB::B/64 In this set up we run two OSPFv3 process with different instances over Eth1 of RTA and Eth1 and Eth2 of RTB Now ospfv3 routing table of both the process will have identical route (I.e. Next hop is same, out-going interface is same, and Cost is same)to 2000:BBBB::/64. Assume the preference/distance of these process also same. Now in this scenario which route should be added to the ipv6 routing-table (/FIB). Adding both is redundant, as all the attributes of the route are same. Thanks and Regards Prasanna From owner-ospf@PEACH.EASE.LSOFT.COM Tue Dec 28 02:58:06 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id CAA04089 for ; Tue, 28 Dec 2004 02:58:06 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <7.00F25DCD@cherry.ease.lsoft.com>; Tue, 28 Dec 2004 2:58:06 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 50955676 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 28 Dec 2004 02:58:05 -0500 Received: from 64.233.184.194 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Tue, 28 Dec 2004 02:58:05 -0500 Received: by wproxy.gmail.com with SMTP id 70so808931wra for ; Mon, 27 Dec 2004 23:58:04 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:references; b=sN5Se6AeMd3ViSNl2Ir/cQnIa7PPHBb90wK9vWNQ/2PMSeQ/Mkn8KdAQ/UsdjwtihdvFKzcQMOc30ot6eqb8nt9aOF4kYJUWS60zVeIvJTuKKvSV9jShGK6fkg0Lr10r/NiihPs6jbmj+88pMbXuT1mnPcse+WI6pYg3PcXoTn4= Received: by 10.54.35.5 with SMTP id i5mr395282wri; Mon, 27 Dec 2004 23:58:04 -0800 (PST) Received: by 10.54.13.29 with HTTP; Mon, 27 Dec 2004 23:58:04 -0800 (PST) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit References: <41CC50D4.5060102@cisco.com> Message-ID: Date: Tue, 28 Dec 2004 13:28:04 +0530 Reply-To: Mailing List Sender: Mailing List From: Santosh Esale Subject: Re: Which route is seleted when two process learn the same route over same link To: OSPF@PEACH.EASE.LSOFT.COM In-Reply-To: Precedence: list Content-Transfer-Encoding: 7bit In such scenerios, OSPFv3's 2 processes will add their respective routes to RIB of Route Manager which is perfectly fine. Now the Route Manager while selecting routes(making active) to download to FIB, knows that the both the route are same(all attributes) except process number, So it shud make only one route active and download to FIB and the second route will remain in RIB(inactive) and will not be downloaded to FIB. Or If one process has added route first to RIB , which would have been downloaded to FIB,and when the second route comes, Route manager knows it is same as previous ospfv3 route except process number attribute, and it shud not be made active and downloaded to FIB. when the active route is withdrawn by ospfv3 process, the inactive route of other ospfv3 process from RIB can now be downloaded to FIB. Regards Santosh On Tue, 28 Dec 2004 10:41:16 +0530, prasanna wrote: > Hi all > I have small doubt. > Consider the following topology > Area 1 Area 1 > RTA-------RTB----------+ > 2000:BBBB::B/64 > > In this set up we run two OSPFv3 process with different instances over > Eth1 of RTA and Eth1 and Eth2 of RTB > > Now ospfv3 routing table of both the process will have identical route > (I.e. Next hop is same, out-going interface is same, and Cost is same)to > 2000:BBBB::/64. > > Assume the preference/distance of these process also same. Now in this > scenario which route should be added to the ipv6 routing-table (/FIB). > > Adding both is redundant, as all the attributes of the route are same. > > Thanks and Regards > Prasanna > -- Regards Santosh Esale Member Technical Staff Riverstone Networks India Pvt Ltd. From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 29 15:51:17 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id PAA10291 for ; Wed, 29 Dec 2004 15:51:16 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <8.00F29093@cherry.ease.lsoft.com>; Wed, 29 Dec 2004 15:51:14 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51177625 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 29 Dec 2004 15:51:13 -0500 Received: from 132.151.1.176 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Wed, 29 Dec 2004 15:41:12 -0500 Received: from CNRI.Reston.VA.US (localhost [127.0.0.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id PAA09428; Wed, 29 Dec 2004 15:41:10 -0500 (EST) Mime-Version: 1.0 Content-Type: Multipart/Mixed; Boundary="NextPart" Message-ID: <200412292041.PAA09428@ietf.org> Date: Wed, 29 Dec 2004 15:41:10 -0500 Reply-To: Mailing List Sender: Mailing List From: Internet-Drafts@ietf.org Subject: I-D ACTION:draft-ietf-ospf-ospfv3-auth-06.txt Comments: To: i-d-announce@ietf.org To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list --NextPart A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Open Shortest Path First IGP Working Group of the IETF. Title : Authentication/Confidentiality for OSPFv3 Author(s) : M. Gupta, N. Melam Filename : draft-ietf-ospf-ospfv3-auth-06.txt Pages : 15 Date : 2004-12-29 This document describes means/mechanisms to provide authentication/confidentiality to OSPFv3 using IPv6 AH/ESP Extension Header. A URL for this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-ospf-ospfv3-auth-06.txt To remove yourself from the I-D Announcement list, send a message to i-d-announce-request@ietf.org with the word unsubscribe in the body of the message. You can also visit https://www1.ietf.org/mailman/listinfo/I-D-announce to change your subscription settings. Internet-Drafts are also available by anonymous FTP. Login with the username "anonymous" and a password of your e-mail address. After logging in, type "cd internet-drafts" and then "get draft-ietf-ospf-ospfv3-auth-06.txt". A list of Internet-Drafts directories can be found in http://www.ietf.org/shadow.html or ftp://ftp.ietf.org/ietf/1shadow-sites.txt Internet-Drafts can also be obtained by e-mail. Send a message to: mailserv@ietf.org. In the body type: "FILE /internet-drafts/draft-ietf-ospf-ospfv3-auth-06.txt". NOTE: The mail server at ietf.org can return the document in MIME-encoded form by using the "mpack" utility. To use this feature, insert the command "ENCODING mime" before the "FILE" command. To decode the response(s), you will need "munpack" or a MIME-compliant mail reader. Different MIME-compliant mail readers exhibit different behavior, especially when dealing with "multipart" MIME messages (i.e. documents which have been split up into multiple messages), so check your local documentation on how to manipulate these messages. Below is the data which will enable a MIME compliant mail reader implementation to automatically retrieve the ASCII version of the Internet-Draft. --NextPart Content-Type: Multipart/Alternative; Boundary="OtherAccess" --OtherAccess Content-Type: Message/External-body; access-type="mail-server"; server="mailserv@ietf.org" Content-Type: text/plain Content-ID: <2004-12-29154103.I-D@ietf.org> ENCODING mime FILE /internet-drafts/draft-ietf-ospf-ospfv3-auth-06.txt --OtherAccess Content-Type: Message/External-body; name="draft-ietf-ospf-ospfv3-auth-06.txt"; site="ftp.ietf.org"; access-type="anon-ftp"; directory="internet-drafts" Content-Type: text/plain Content-ID: <2004-12-29154103.I-D@ietf.org> --OtherAccess-- --NextPart-- From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 29 16:22:19 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id QAA17075 for ; Wed, 29 Dec 2004 16:22:18 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <8.00F29112@cherry.ease.lsoft.com>; Wed, 29 Dec 2004 16:22:19 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51179838 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 29 Dec 2004 16:22:18 -0500 Received: from 131.228.20.21 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Wed, 29 Dec 2004 16:22:14 -0500 Received: from esdks001.ntc.nokia.com (esdks001.ntc.nokia.com [172.21.138.120]) by mgw-x1.nokia.com (Switch-2.2.8/Switch-2.2.8) with ESMTP id iBTLMCD28027; Wed, 29 Dec 2004 23:22:12 +0200 (EET) X-Scanned: Wed, 29 Dec 2004 23:28:24 +0200 Nokia Message Protector V1.3.34 2004121512 - RELEASE Received: (from root@localhost) by esdks001.ntc.nokia.com (8.12.9/8.12.9) id iBTLSOCO013651; Wed, 29 Dec 2004 23:28:24 +0200 Received: from mgw-int2.ntc.nokia.com (172.21.143.97) by esdks001.ntc.nokia.com 00CXdIaN; Wed, 29 Dec 2004 23:28:22 EET Received: from daebh001.NOE.Nokia.com (daebh001.americas.nokia.com [10.241.35.121]) by mgw-int2.ntc.nokia.com (Switch-2.2.8/Switch-2.2.8) with ESMTP id iBTLLSx02290; Wed, 29 Dec 2004 23:21:28 +0200 (EET) Received: from daebe009.NOE.Nokia.com ([10.241.35.109]) by daebh001.NOE.Nokia.com with Microsoft SMTPSVC(5.0.2195.6881); Wed, 29 Dec 2004 15:21:28 -0600 X-MimeOLE: Produced By Microsoft Exchange V6.0.6487.1 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thread-Topic: I-D ACTION:draft-ietf-ospf-ospfv3-auth-06.txt thread-index: AcTt6Ey108ldSj9qSBG6qc/YgFidaAAAy/6A X-OriginalArrivalTime: 29 Dec 2004 21:21:28.0133 (UTC) FILETIME=[5BCB4750:01C4EDEC] Message-ID: <8D260779A766FB4A9C1739A476F84FA4026AB7FD@daebe009.americas.nokia.com> Date: Wed, 29 Dec 2004 15:21:27 -0600 Reply-To: Mailing List Sender: Mailing List From: Mukesh Gupta Subject: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review Comments: To: fenner@research.att.com, zinin@psg.com Comments: cc: Nagavenkata.Melam@nokia.com To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: quoted-printable Alex/Bill, 06 version of the OSPFv3 Security draft addresses the=20 following comments/issues: From IESG: - Discuss about how much protection OSPF has for replay=20 attacks without the security enabled - Add references to 3602 and 2404 - Analyze and recommend values of rekeying interval and = KeyRolloverInterval - Spell out in the security considerations that one router can = impersonate another - Larger routing security not considered here (refer to rpsec) i.e., "What's left to worry about after you deploy this?" - Refer to rpsec drafts From authors: - MUST requirement for hex format keys. This will significantly=20 increase the entropy of the keys. We have addressed all the comments from IESG and we think that this version is ready to be reviewed by IESG again. Regards Mukesh & Suresh > -----Original Message----- > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM]On Behalf Of ext > Internet-Drafts@IETF.ORG > Sent: Wednesday, December 29, 2004 12:41 PM > To: OSPF@PEACH.EASE.LSOFT.COM > Subject: I-D ACTION:draft-ietf-ospf-ospfv3-auth-06.txt >=20 >=20 > A New Internet-Draft is available from the on-line=20 > Internet-Drafts directories. > This draft is a work item of the Open Shortest Path First IGP=20 > Working Group of the IETF. >=20 > Title : Authentication/Confidentiality for OSPFv3 > Author(s) : M. Gupta, N. Melam > Filename : draft-ietf-ospf-ospfv3-auth-06.txt > Pages : 15 > Date : 2004-12-29 > =09 > This document describes means/mechanisms to provide=20 > authentication/confidentiality to OSPFv3 using IPv6 AH/ESP Extension=20 > Header. >=20 > A URL for this Internet-Draft is: > http://www.ietf.org/internet-drafts/draft-ietf-ospf-ospfv3-auth-06.txt >=20 > To remove yourself from the I-D Announcement list, send a message to=20 > i-d-announce-request@ietf.org with the word unsubscribe in=20 > the body of the message. =20 > You can also visit=20 > https://www1.ietf.org/mailman/listinfo/I-D-announce=20 > to change your subscription settings. >=20 >=20 > Internet-Drafts are also available by anonymous FTP. Login=20 > with the username > "anonymous" and a password of your e-mail address. After logging in, > type "cd internet-drafts" and then > "get draft-ietf-ospf-ospfv3-auth-06.txt". >=20 > A list of Internet-Drafts directories can be found in > http://www.ietf.org/shadow.html=20 > or ftp://ftp.ietf.org/ietf/1shadow-sites.txt >=20 >=20 > Internet-Drafts can also be obtained by e-mail. >=20 > Send a message to: > mailserv@ietf.org. > In the body type: > "FILE /internet-drafts/draft-ietf-ospf-ospfv3-auth-06.txt". > =09 > NOTE: The mail server at ietf.org can return the document in > MIME-encoded form by using the "mpack" utility. To use this > feature, insert the command "ENCODING mime" before the "FILE" > command. To decode the response(s), you will need "munpack" or > a MIME-compliant mail reader. Different MIME-compliant=20 > mail readers > exhibit different behavior, especially when dealing with > "multipart" MIME messages (i.e. documents which have been split > up into multiple messages), so check your local documentation on > how to manipulate these messages. > =09 > =09 > Below is the data which will enable a MIME compliant mail reader > implementation to automatically retrieve the ASCII version of the > Internet-Draft. >=20 From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 29 16:22:34 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id QAA17135 for ; Wed, 29 Dec 2004 16:22:27 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <2.00F292B8@cherry.ease.lsoft.com>; Wed, 29 Dec 2004 16:22:25 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51179889 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 29 Dec 2004 16:22:24 -0500 Received: from 63.113.148.10 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Wed, 29 Dec 2004 16:22:24 -0500 Received: from mgate1.riverstonenet.com by riverstonenet.com (8.9.3+Sun/SMI-SVR4-Yago) id NAA18740; Wed, 29 Dec 2004 13:22:23 -0800 (PST) Received: (from daemon@localhost) by mgate1.riverstonenet.com (8.13.1/8.13.1) id iBTLMNt3007119; Wed, 29 Dec 2004 13:22:23 -0800 (PST) X-Authentication-Warning: mgate1.riverstonenet.com: Processed by daemon with -C /etc/mail/sendmail-simple.cf Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by mgate1.riverstonenet.com (8.13.1/8.13.1) with ESMTP id iBTLMKn3007106 for ; Wed, 29 Dec 2004 13:22:20 -0800 (PST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <8.00F29112@cherry.ease.lsoft.com>; Wed, 29 Dec 2004 16:22:19 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51179838 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 29 Dec 2004 16:22:18 -0500 Received: from 131.228.20.21 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Wed, 29 Dec 2004 16:22:14 -0500 Received: from esdks001.ntc.nokia.com (esdks001.ntc.nokia.com [172.21.138.120]) by mgw-x1.nokia.com (Switch-2.2.8/Switch-2.2.8) with ESMTP id iBTLMCD28027; Wed, 29 Dec 2004 23:22:12 +0200 (EET) X-Scanned: Wed, 29 Dec 2004 23:28:24 +0200 Nokia Message Protector V1.3.34 2004121512 - RELEASE Received: (from root@localhost) by esdks001.ntc.nokia.com (8.12.9/8.12.9) id iBTLSOCO013651; Wed, 29 Dec 2004 23:28:24 +0200 Received: from mgw-int2.ntc.nokia.com (172.21.143.97) by esdks001.ntc.nokia.com 00CXdIaN; Wed, 29 Dec 2004 23:28:22 EET Received: from daebh001.NOE.Nokia.com (daebh001.americas.nokia.com [10.241.35.121]) by mgw-int2.ntc.nokia.com (Switch-2.2.8/Switch-2.2.8) with ESMTP id iBTLLSx02290; Wed, 29 Dec 2004 23:21:28 +0200 (EET) Received: from daebe009.NOE.Nokia.com ([10.241.35.109]) by daebh001.NOE.Nokia.com with Microsoft SMTPSVC(5.0.2195.6881); Wed, 29 Dec 2004 15:21:28 -0600 X-MimeOLE: Produced By Microsoft Exchange V6.0.6487.1 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Thread-Topic: I-D ACTION:draft-ietf-ospf-ospfv3-auth-06.txt thread-index: AcTt6Ey108ldSj9qSBG6qc/YgFidaAAAy/6A X-OriginalArrivalTime: 29 Dec 2004 21:21:28.0133 (UTC) FILETIME=[5BCB4750:01C4EDEC] Precedence: list X-Spam-Status: No, score=0.0 required=4.0 tests=none autolearn=failed version=3.0.1 X-Spam-Checker-Version: SpamAssassin 3.0.1 (2004-10-22) on mgate1.riverstonenet.com Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mgate1.riverstonenet.com id iBTLMKn3007106 Message-ID: <8D260779A766FB4A9C1739A476F84FA4026AB7FD@daebe009.americas.nokia.com> Date: Wed, 29 Dec 2004 15:21:27 -0600 Reply-To: Mailing List Sender: Mailing List Comments: To: fenner@research.att.com, zinin@psg.com Comments: cc: Nagavenkata.Melam@nokia.com From: Mukesh Gupta Subject: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review To: OSPF@PEACH.EASE.LSOFT.COM Content-Transfer-Encoding: 8bit Alex/Bill, 06 version of the OSPFv3 Security draft addresses the following comments/issues: From IESG: - Discuss about how much protection OSPF has for replay attacks without the security enabled - Add references to 3602 and 2404 - Analyze and recommend values of rekeying interval and KeyRolloverInterval - Spell out in the security considerations that one router can impersonate another - Larger routing security not considered here (refer to rpsec) i.e., "What's left to worry about after you deploy this?" - Refer to rpsec drafts From authors: - MUST requirement for hex format keys. This will significantly increase the entropy of the keys. We have addressed all the comments from IESG and we think that this version is ready to be reviewed by IESG again. Regards Mukesh & Suresh > -----Original Message----- > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM]On Behalf Of ext > Internet-Drafts@IETF.ORG > Sent: Wednesday, December 29, 2004 12:41 PM > To: OSPF@PEACH.EASE.LSOFT.COM > Subject: I-D ACTION:draft-ietf-ospf-ospfv3-auth-06.txt > > > A New Internet-Draft is available from the on-line > Internet-Drafts directories. > This draft is a work item of the Open Shortest Path First IGP > Working Group of the IETF. > > Title : Authentication/Confidentiality for OSPFv3 > Author(s) : M. Gupta, N. Melam > Filename : draft-ietf-ospf-ospfv3-auth-06.txt > Pages : 15 > Date : 2004-12-29 > > This document describes means/mechanisms to provide > authentication/confidentiality to OSPFv3 using IPv6 AH/ESP Extension > Header. > > A URL for this Internet-Draft is: > http://www.ietf.org/internet-drafts/draft-ietf-ospf-ospfv3-auth-06.txt > > To remove yourself from the I-D Announcement list, send a message to > i-d-announce-request@ietf.org with the word unsubscribe in > the body of the message. > You can also visit > https://www1.ietf.org/mailman/listinfo/I-D-announce > to change your subscription settings. > > > Internet-Drafts are also available by anonymous FTP. Login > with the username > "anonymous" and a password of your e-mail address. After logging in, > type "cd internet-drafts" and then > "get draft-ietf-ospf-ospfv3-auth-06.txt". > > A list of Internet-Drafts directories can be found in > http://www.ietf.org/shadow.html > or ftp://ftp.ietf.org/ietf/1shadow-sites.txt > > > Internet-Drafts can also be obtained by e-mail. > > Send a message to: > mailserv@ietf.org. > In the body type: > "FILE /internet-drafts/draft-ietf-ospf-ospfv3-auth-06.txt". > > NOTE: The mail server at ietf.org can return the document in > MIME-encoded form by using the "mpack" utility. To use this > feature, insert the command "ENCODING mime" before the "FILE" > command. To decode the response(s), you will need "munpack" or > a MIME-compliant mail reader. Different MIME-compliant > mail readers > exhibit different behavior, especially when dealing with > "multipart" MIME messages (i.e. documents which have been split > up into multiple messages), so check your local documentation on > how to manipulate these messages. > > > Below is the data which will enable a MIME compliant mail reader > implementation to automatically retrieve the ASCII version of the > Internet-Draft. > From owner-ospf@PEACH.EASE.LSOFT.COM Wed Dec 29 17:22:04 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id RAA26068 for ; Wed, 29 Dec 2004 17:22:04 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <20.00F292BA@cherry.ease.lsoft.com>; Wed, 29 Dec 2004 17:22:04 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51184520 for OSPF@PEACH.EASE.LSOFT.COM; Wed, 29 Dec 2004 17:22:00 -0500 Received: from 192.20.225.110 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Wed, 29 Dec 2004 17:21:58 -0500 Received: from windsor.research.att.com (windsor.research.att.com [135.207.26.46]) by mail-blue.research.att.com (Postfix) with ESMTP id BC3BC197350; Wed, 29 Dec 2004 17:08:40 -0500 (EST) Received: (from fenner@localhost) by windsor.research.att.com (8.11.6+Sun/8.8.5) id iBTMLv418987; Wed, 29 Dec 2004 14:21:58 -0800 (PST) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Versions: dmail (solaris) 2.6d/makemail 2.10 Message-ID: <200412292221.iBTMLv418987@windsor.research.att.com> Date: Wed, 29 Dec 2004 14:21:54 -0800 Reply-To: Mailing List Sender: Mailing List From: Bill Fenner Subject: Re: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review Comments: To: Mukesh.K.Gupta@nokia.com Comments: cc: zinin@psg.com, Nagavenkata.Melam@nokia.com To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Thanks, Mukesh. I'll review it and put it on the IESG agenda for January 6th. Bill From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 30 00:08:08 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id AAA25463 for ; Thu, 30 Dec 2004 00:08:07 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <17.00F29CF3@cherry.ease.lsoft.com>; Thu, 30 Dec 2004 0:07:58 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51217098 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 30 Dec 2004 00:07:52 -0500 Received: from 63.197.255.158 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Thu, 30 Dec 2004 00:01:14 -0500 X-MimeOLE: Produced By Microsoft Exchange V6.5.6944.0 MIME-Version: 1.0 X-MS-TNEF-Correlator: Thread-Topic: I-D ACTION:draft-ietf-ospf-ospfv3-auth-06.txt thread-index: AcTt6Ey108ldSj9qSBG6qc/YgFidaAAAy/6AABBUfKo= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message-ID: Date: Wed, 29 Dec 2004 21:09:56 -0800 Reply-To: Mailing List Sender: Mailing List From: Vishwas Manral Subject: Re: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: quoted-printable Hi Mukesh and Suresh, =20 I went through the draft and think it is in pretty good shape now and = seems most of my comments are taken care of. However :- =20 1. In the draft you state that there are know known problems of = replaying DB packets. Replaying a DB packet can result in the entrie = database being exchanged again which is a CPU heavy process. 2. Similar issues with LS request packets. 3. Though we have addressed the case of specifying some = default/supported values, I think we do not do that for all optional = parameters. e.g. ESN etc. 4. We can have multiple SA's between two routers. When DSCP is supported = should the same SA be used or should multiple SA's be used? =20 Thanks, Vishwas ________________________________ From: Mailing List on behalf of Mukesh Gupta Sent: Wed 12/29/2004 1:21 PM To: OSPF@PEACH.EASE.LSOFT.COM Subject: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review Alex/Bill, 06 version of the OSPFv3 Security draft addresses the following comments/issues: From IESG: - Discuss about how much protection OSPF has for replay attacks without the security enabled - Add references to 3602 and 2404 - Analyze and recommend values of rekeying interval and = KeyRolloverInterval - Spell out in the security considerations that one router can = impersonate another - Larger routing security not considered here (refer to rpsec) i.e., "What's left to worry about after you deploy this?" - Refer to rpsec drafts From authors: - MUST requirement for hex format keys. This will significantly increase the entropy of the keys. We have addressed all the comments from IESG and we think that this version is ready to be reviewed by IESG again. Regards Mukesh & Suresh > -----Original Message----- > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM]On Behalf Of ext > Internet-Drafts@IETF.ORG > Sent: Wednesday, December 29, 2004 12:41 PM > To: OSPF@PEACH.EASE.LSOFT.COM > Subject: I-D ACTION:draft-ietf-ospf-ospfv3-auth-06.txt > > > A New Internet-Draft is available from the on-line > Internet-Drafts directories. > This draft is a work item of the Open Shortest Path First IGP > Working Group of the IETF. > > Title : Authentication/Confidentiality for OSPFv3 > Author(s) : M. Gupta, N. Melam > Filename : draft-ietf-ospf-ospfv3-auth-06.txt > Pages : 15 > Date : 2004-12-29 > =20 > This document describes means/mechanisms to provide > authentication/confidentiality to OSPFv3 using IPv6 AH/ESP Extension > Header. > > A URL for this Internet-Draft is: > http://www.ietf.org/internet-drafts/draft-ietf-ospf-ospfv3-auth-06.txt > > To remove yourself from the I-D Announcement list, send a message to > i-d-announce-request@ietf.org with the word unsubscribe in > the body of the message.=20 > You can also visit > https://www1.ietf.org/mailman/listinfo/I-D-announce > to change your subscription settings. > > > Internet-Drafts are also available by anonymous FTP. Login > with the username > "anonymous" and a password of your e-mail address. After logging in, > type "cd internet-drafts" and then > "get draft-ietf-ospf-ospfv3-auth-06.txt". > > A list of Internet-Drafts directories can be found in > http://www.ietf.org/shadow.html > or ftp://ftp.ietf.org/ietf/1shadow-sites.txt > > > Internet-Drafts can also be obtained by e-mail. > > Send a message to: > mailserv@ietf.org. > In the body type: > "FILE /internet-drafts/draft-ietf-ospf-ospfv3-auth-06.txt". > =20 > NOTE: The mail server at ietf.org can return the document in > MIME-encoded form by using the "mpack" utility. To use this > feature, insert the command "ENCODING mime" before the "FILE" > command. To decode the response(s), you will need "munpack" or > a MIME-compliant mail reader. Different MIME-compliant > mail readers > exhibit different behavior, especially when dealing with > "multipart" MIME messages (i.e. documents which have been split > up into multiple messages), so check your local documentation on > how to manipulate these messages. > =20 > =20 > Below is the data which will enable a MIME compliant mail reader > implementation to automatically retrieve the ASCII version of the > Internet-Draft. > From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 30 00:08:50 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id AAA25528 for ; Thu, 30 Dec 2004 00:08:49 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <18.00F29AA5@cherry.ease.lsoft.com>; Thu, 30 Dec 2004 0:08:48 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51217397 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 30 Dec 2004 00:08:42 -0500 Received: from 63.113.148.10 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Thu, 30 Dec 2004 00:08:19 -0500 Received: from mgate1.riverstonenet.com by riverstonenet.com (8.9.3+Sun/SMI-SVR4-Yago) id VAA10767; Wed, 29 Dec 2004 21:08:18 -0800 (PST) Received: (from daemon@localhost) by mgate1.riverstonenet.com (8.13.1/8.13.1) id iBU58IHP005697; Wed, 29 Dec 2004 21:08:18 -0800 (PST) X-Authentication-Warning: mgate1.riverstonenet.com: Processed by daemon with -C /etc/mail/sendmail-simple.cf Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by mgate1.riverstonenet.com (8.13.1/8.13.1) with ESMTP id iBU5864u005677 for ; Wed, 29 Dec 2004 21:08:06 -0800 (PST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <17.00F29CF3@cherry.ease.lsoft.com>; Thu, 30 Dec 2004 0:07:58 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51217098 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 30 Dec 2004 00:07:52 -0500 Received: from 63.197.255.158 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Thu, 30 Dec 2004 00:01:14 -0500 X-MimeOLE: Produced By Microsoft Exchange V6.5.6944.0 MIME-Version: 1.0 X-MS-TNEF-Correlator: Thread-Topic: I-D ACTION:draft-ietf-ospf-ospfv3-auth-06.txt thread-index: AcTt6Ey108ldSj9qSBG6qc/YgFidaAAAy/6AABBUfKo= Content-Type: text/plain; charset="iso-8859-1" Precedence: list X-Spam-Status: No, score=0.0 required=4.0 tests=none autolearn=failed version=3.0.1 X-Spam-Checker-Version: SpamAssassin 3.0.1 (2004-10-22) on mgate1.riverstonenet.com Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mgate1.riverstonenet.com id iBU5864u005677 Message-ID: Date: Wed, 29 Dec 2004 21:09:56 -0800 Reply-To: Mailing List Sender: Mailing List From: Vishwas Manral Subject: Re: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review To: OSPF@PEACH.EASE.LSOFT.COM Content-Transfer-Encoding: 8bit Hi Mukesh and Suresh, I went through the draft and think it is in pretty good shape now and seems most of my comments are taken care of. However :- 1. In the draft you state that there are know known problems of replaying DB packets. Replaying a DB packet can result in the entrie database being exchanged again which is a CPU heavy process. 2. Similar issues with LS request packets. 3. Though we have addressed the case of specifying some default/supported values, I think we do not do that for all optional parameters. e.g. ESN etc. 4. We can have multiple SA's between two routers. When DSCP is supported should the same SA be used or should multiple SA's be used? Thanks, Vishwas ________________________________ From: Mailing List on behalf of Mukesh Gupta Sent: Wed 12/29/2004 1:21 PM To: OSPF@PEACH.EASE.LSOFT.COM Subject: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review Alex/Bill, 06 version of the OSPFv3 Security draft addresses the following comments/issues: From IESG: - Discuss about how much protection OSPF has for replay attacks without the security enabled - Add references to 3602 and 2404 - Analyze and recommend values of rekeying interval and KeyRolloverInterval - Spell out in the security considerations that one router can impersonate another - Larger routing security not considered here (refer to rpsec) i.e., "What's left to worry about after you deploy this?" - Refer to rpsec drafts From authors: - MUST requirement for hex format keys. This will significantly increase the entropy of the keys. We have addressed all the comments from IESG and we think that this version is ready to be reviewed by IESG again. Regards Mukesh & Suresh > -----Original Message----- > From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM]On Behalf Of ext > Internet-Drafts@IETF.ORG > Sent: Wednesday, December 29, 2004 12:41 PM > To: OSPF@PEACH.EASE.LSOFT.COM > Subject: I-D ACTION:draft-ietf-ospf-ospfv3-auth-06.txt > > > A New Internet-Draft is available from the on-line > Internet-Drafts directories. > This draft is a work item of the Open Shortest Path First IGP > Working Group of the IETF. > > Title : Authentication/Confidentiality for OSPFv3 > Author(s) : M. Gupta, N. Melam > Filename : draft-ietf-ospf-ospfv3-auth-06.txt > Pages : 15 > Date : 2004-12-29 > > This document describes means/mechanisms to provide > authentication/confidentiality to OSPFv3 using IPv6 AH/ESP Extension > Header. > > A URL for this Internet-Draft is: > http://www.ietf.org/internet-drafts/draft-ietf-ospf-ospfv3-auth-06.txt > > To remove yourself from the I-D Announcement list, send a message to > i-d-announce-request@ietf.org with the word unsubscribe in > the body of the message. > You can also visit > https://www1.ietf.org/mailman/listinfo/I-D-announce > to change your subscription settings. > > > Internet-Drafts are also available by anonymous FTP. Login > with the username > "anonymous" and a password of your e-mail address. After logging in, > type "cd internet-drafts" and then > "get draft-ietf-ospf-ospfv3-auth-06.txt". > > A list of Internet-Drafts directories can be found in > http://www.ietf.org/shadow.html > or ftp://ftp.ietf.org/ietf/1shadow-sites.txt > > > Internet-Drafts can also be obtained by e-mail. > > Send a message to: > mailserv@ietf.org. > In the body type: > "FILE /internet-drafts/draft-ietf-ospf-ospfv3-auth-06.txt". > > NOTE: The mail server at ietf.org can return the document in > MIME-encoded form by using the "mpack" utility. To use this > feature, insert the command "ENCODING mime" before the "FILE" > command. To decode the response(s), you will need "munpack" or > a MIME-compliant mail reader. Different MIME-compliant > mail readers > exhibit different behavior, especially when dealing with > "multipart" MIME messages (i.e. documents which have been split > up into multiple messages), so check your local documentation on > how to manipulate these messages. > > > Below is the data which will enable a MIME compliant mail reader > implementation to automatically retrieve the ASCII version of the > Internet-Draft. > From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 30 00:46:51 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id AAA27819 for ; Thu, 30 Dec 2004 00:46:50 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <23.00F29CDB@cherry.ease.lsoft.com>; Thu, 30 Dec 2004 0:46:48 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51222196 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 30 Dec 2004 00:46:46 -0500 Received: from 63.197.255.158 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Thu, 30 Dec 2004 00:46:46 -0500 X-MimeOLE: Produced By Microsoft Exchange V6.5.6944.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C4EE34.2C9BF086" Thread-Topic: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review thread-index: AcTuNCyZyn9vDJkgR2uoT7vU2kWhqw== Message-ID: Date: Wed, 29 Dec 2004 21:55:32 -0800 Reply-To: Mailing List Sender: Mailing List From: Vishwas Manral Subject: Re: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list This is a multi-part message in MIME format. ------_=_NextPart_001_01C4EE34.2C9BF086 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi, =20 Some more minor comments: - =20 1. In "Rekeying Interval" You are giving examples only for ESP, but it = is never stated that we are talking only of ESP(and not AH). 2. You state=20 " DES Encryption and HMAC-MD5 Authentication will be more secure because of the additional security provided by DES" but the draft = http://www.ietf.org/internet-drafts/draft-ietf-ipsec-esp-ah-algorithms-02= .txt very clearly states that for AH/ESP we should not use DES(for well known = reasons)=20 "SHOULD NOT DES-CBC [RFC 2405] (3)". I am not sure if we want = to mention DES at all. 3. The section 12, is states the mandatory "encryption and = authentication algorithms" but does not state the key size to be used = for AES-CBC. 4. On another front instead of having one draft specifying both the = support as well as the algorithm's used, would we want a seperate draft = for supported algorithms. This allows us to change the supported = algorithms even when the base OSPFv3 for IPSec stays the same e.g. when = vulnerabilities are found in the algorithm or when key sizes have to be = made bigger. This is how it is done in the IPSec working group too(where = AH/ESP algorithm's have been seperated from the supported algorithms). =20 Thanks, Vishwas =20 -------------------------------------------------------------------------= ------- From: Mailing List on behalf of Vishwas Manral Sent: Wed 12/29/2004 9:09 PM To: OSPF@PEACH.EASE.LSOFT.COM Subject: Re: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review Hi Mukesh and Suresh, I went through the draft and think it is in pretty good shape now and = seems most of my comments are taken care of. However :- 1. In the draft you state that there are know known problems of = replaying DB packets. Replaying a DB packet can result in the entrie = database being exchanged again which is a CPU heavy process. 2. Similar issues with LS request packets. 3. Though we have addressed the case of specifying some = default/supported values, I think we do not do that for all optional = parameters. e.g. ESN etc. 4. We can have multiple SA's between two routers. When DSCP is supported = should the same SA be used or should multiple SA's be used? Thanks, Vishwas ________________________________ From: Mailing List on behalf of Mukesh Gupta Sent: Wed 12/29/2004 1:21 PM To: OSPF@PEACH.EASE.LSOFT.COM Subject: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review =20 Alex/Bill, 06 version of the OSPFv3 Security draft addresses the following comments/issues: From IESG: - Discuss about how much protection OSPF has for replay attacks without the security enabled - Add references to 3602 and 2404 - Analyze and recommend values of rekeying interval and = KeyRolloverInterval - Spell out in the security considerations that one router can = impersonate another - Larger routing security not considered here (refer to rpsec) i.e., "What's left to worry about after you deploy this?" - Refer to rpsec drafts From authors: - MUST requirement for hex format keys. This will significantly increase the entropy of the keys. We have addressed all the comments from IESG and we think that this version is ready to be reviewed by IESG again. Regards Mukesh & Suresh ------_=_NextPart_001_01C4EE34.2C9BF086 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable =0A= =0A= =0A= =0A= =0A= =0A=
Hi,
=0A=
 
=0A=
Some more minor comments: -
=0A=
 
=0A=
1. In "Rekeying Interval" You are giving examples only for ESP, but = it is =0A= never stated that we are talking only of ESP(and not AH).
=0A=
2.  You state
" DES Encryption and HMAC-MD5 Authentication = will be =0A= more secure
   because of the additional security provided = by =0A= DES"
but the draft http://www.ietf.org/internet-drafts/draft-ietf-ipsec-esp-ah= -algorithms-02.txt
very =0A= clearly states that for AH/ESP we should not use DES(for well known = reasons) =0A=
      "SHOULD NOT     = DES-CBC =0A= [RFC 2405] (3)". I am not sure if we want to mention DES at all.
=0A=
3. The section 12, is states the mandatory "encryption and = authentication =0A= algorithms" but does not state the key size to be used for AES-CBC.
=0A=
4. On another front instead of having one draft specifying both the = support =0A= as well as the algorithm's used, would we want a seperate draft for = supported =0A= algorithms. This allows us to change the supported algorithms even when = the base =0A= OSPFv3 for IPSec stays the same e.g. when vulnerabilities are found in = the =0A= algorithm or when key sizes have to be made bigger. This is how it is = done in =0A= the IPSec working group too(where AH/ESP algorithm's have been seperated = from =0A= the supported algorithms).
=0A=
 
=0A=
Thanks,
Vishwas
=0A=
 
=0A=

----------------------------------------------------------------= ----------------
From: =0A= Mailing List on behalf of Vishwas Manral
Sent: Wed 12/29/2004 9:09 = PM
To: =0A= OSPF@PEACH.EASE.LSOFT.COMSubject: =0A= Re: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review
=0A=

Hi Mukesh and Suresh,
=0A=
I went through the draft and think it is in pretty good shape now = and seems =0A= most of my comments are taken care of. However :-
=0A=
1. In the draft you state that there are know known problems of = replaying =0A= DB packets. Replaying a DB packet can result in the entrie database = being =0A= exchanged again which is a CPU heavy process.
2. Similar issues with = LS =0A= request packets.
3.  Though we have addressed the case of = specifying =0A= some default/supported values, I think we do not do that for all = optional =0A= parameters. e.g. ESN etc.
4. We can have multiple SA's between two = routers. =0A= When DSCP is supported should the same SA be used or should multiple = SA's be =0A= used?
=0A=
Thanks,
Vishwas
=0A=
________________________________
=0A=
From: Mailing List on behalf of Mukesh Gupta
Sent: Wed = 12/29/2004 1:21 =0A= PM
To: OSPF@PEACH.EASE.LSOFT.COMSubject: =0A= draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review
=0A=
 
=0A=
Alex/Bill,
=0A=
06 version of the OSPFv3 Security draft addresses the
following =0A= comments/issues:
=0A=
From IESG:
- Discuss about how much protection OSPF has for =0A= replay
  attacks without the security enabled
- Add = references to =0A= 3602 and 2404
- Analyze and recommend values of rekeying interval and =0A= KeyRolloverInterval
- Spell out in the security considerations that = one =0A= router can impersonate another
- Larger routing security not = considered here =0A= (refer to rpsec)
  i.e., "What's left to worry about after you = deploy =0A= this?"
- Refer to rpsec drafts
=0A=
From authors:
- MUST requirement for hex format keys.  This = will =0A= significantly
  increase the entropy of the keys.
=0A=
We have addressed all the comments from IESG and we think = that
this =0A= version is ready to be reviewed by IESG again.
=0A=
Regards
Mukesh & Suresh
=0A= =0A= ------_=_NextPart_001_01C4EE34.2C9BF086-- From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 30 11:58:14 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id LAA27273 for ; Thu, 30 Dec 2004 11:57:30 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <3.00F2A87E@cherry.ease.lsoft.com>; Thu, 30 Dec 2004 11:57:30 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51293231 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 30 Dec 2004 11:57:23 -0500 Received: from 132.177.123.82 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Thu, 30 Dec 2004 11:57:22 -0500 Received: from iol.unh.edu (scrappy.iol.unh.edu [132.177.118.198]) by io.iol.unh.edu (8.13.2/8.13.2) with ESMTP id iBUGvFfI030396 for ; Thu, 30 Dec 2004 11:57:15 -0500 User-Agent: Mozilla/5.0 (X11; U; Linux alpha; en-US; rv:0.9.9) Gecko/20020503 X-Accept-Language: en-us, en MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------010400010609010608010404" X-UNH-IOL-MailScanner-Information: Please contact systems@iol.unh.edu for more information X-UNH-IOL-MailScanner: Found to be clean X-UNH-IOL-MailScanner-From: mcleary@iol.unh.edu Message-ID: <41D43402.4060303@iol.unh.edu> Date: Thu, 30 Dec 2004 11:59:46 -0500 Reply-To: Mailing List Sender: Mailing List From: Mike Cleary Subject: NSSA Test Case To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list This is a multi-part message in MIME format. --------------010400010609010608010404 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Hello, I am trying to set up a test case where two routers advertise static routes to the same network 3.3.3.0/24 with the same forwarding address. I need one of the routers to be running in the backbone on network 10.10.10.0/24 and both of the routers to be running in area 1 (nssa) on network 10.10.11.0/24. I tried giving the routers a forwarding address of 10.10.10.141 however one of them does not use this as the forwarding address since it is not running on network 10.10.10.0/24. I also tried advertising a forwarding address of 10.10.11.141 since they will both be able to advertize this. However the problem is that I have a third router also running on network 1 and it installs the route through 10.10.11.141 instead of chosing one of the two routers. Does anyone know of a way to force the third router to chose one of the two others to install the route through? I have attached a diagram that might be helpful. Thanks, ~Mike -- ********************************************* Michael Cleary Email: mcleary@iol.unh.edu IPv4 Consortium UNH InterOperability Lab 121 Technology Dr., Suite 2, Durham, NH 03824 Phone: 603-862-3941 http://www.iol.unh.edu ********************************************* --------------010400010609010608010404 Content-Type: image/bmp; name="test.bmp" Content-Disposition: inline; filename="test.bmp" Content-Transfer-Encoding: base64 Qk2WpgMAAAAAADYAAAAoAAAAjgEAAMgAAAABABgAAAAAAAAAAADEDgAAxA4AAAAAAAAAAAAA 39/ff39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/ f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/ f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/ f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/ f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/ f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/ 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//////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////// //////////////////////////////////////////8AAA== --------------010400010609010608010404-- From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 30 17:03:21 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id RAA21481 for ; Thu, 30 Dec 2004 17:03:20 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <11.00F2AC3C@cherry.ease.lsoft.com>; Thu, 30 Dec 2004 17:03:17 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51315505 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 30 Dec 2004 17:03:00 -0500 Received: from 131.228.20.21 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Thu, 30 Dec 2004 17:02:59 -0500 Received: from esdks002.ntc.nokia.com (esdks002.ntc.nokia.com [172.21.138.121]) by mgw-x1.nokia.com (Switch-2.2.8/Switch-2.2.8) with ESMTP id iBUM2wD00063 for ; Fri, 31 Dec 2004 00:02:59 +0200 (EET) X-Scanned: Fri, 31 Dec 2004 00:02:26 +0200 Nokia Message Protector V1.3.34 2004121512 - RELEASE Received: (from root@localhost) by esdks002.ntc.nokia.com (8.12.9/8.12.9) id iBUM2QcT016969 for ; Fri, 31 Dec 2004 00:02:26 +0200 Received: from mgw-int1.ntc.nokia.com (172.21.143.96) by esdks002.ntc.nokia.com 00vxEk6Q; Fri, 31 Dec 2004 00:02:26 EET Received: from daebh001.NOE.Nokia.com (daebh001.americas.nokia.com [10.241.35.121]) by mgw-int1.ntc.nokia.com (Switch-2.2.8/Switch-2.2.8) with ESMTP id iBUM2OU09434 for ; Fri, 31 Dec 2004 00:02:24 +0200 (EET) Received: from daebe009.NOE.Nokia.com ([10.241.35.109]) by daebh001.NOE.Nokia.com with Microsoft SMTPSVC(5.0.2195.6881); Thu, 30 Dec 2004 16:01:20 -0600 X-MimeOLE: Produced By Microsoft Exchange V6.0.6487.1 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thread-Topic: I-D ACTION:draft-ietf-ospf-ospfv3-auth-06.txt thread-index: AcTt6Ey108ldSj9qSBG6qc/YgFidaAAAy/6AABBUfKoAHi1O8A== X-OriginalArrivalTime: 30 Dec 2004 22:01:20.0557 (UTC) FILETIME=[1833F5D0:01C4EEBB] Message-ID: <8D260779A766FB4A9C1739A476F84FA401F79BA8@daebe009.americas.nokia.com> Date: Thu, 30 Dec 2004 16:01:19 -0600 Reply-To: Mailing List Sender: Mailing List From: Mukesh Gupta Subject: Re: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: quoted-printable Vishwas, Thanks for reviewing the draft again. Please see my comments inline.. > 1. In the draft you state that there are know known problems=20 > of replaying DB packets. Replaying a DB packet can result in=20 > the entrie database being exchanged again which is a CPU=20 > heavy process. > 2. Similar issues with LS request packets. Though we trusted section 3.2.3 of the draft=20 draft-ietf-rpsec-ospf-vuln-01.txt to make those statements, isn't it true that the duplicate DD packets are just discarded=20 if the adjacency is already in FULL state ? Yes there are resource consumption problems with replayed LSR packets. Should we replace text "There are no known threats of replaying these type of packets." with "There are no known threats of replaying these type of packets except that the receiving router will have to spend some resources to handle these packets." > 3. Though we have addressed the case of specifying some=20 > default/supported values, I think we do not do that for all=20 > optional parameters. e.g. ESN etc. Sorry ! I do not understand which default/supported values=20 you are talking about here :( Could you please be a little more specific? > 4. We can have multiple SA's between two routers. When DSCP=20 > is supported should the same SA be used or should multiple=20 > SA's be used? Do you see any problems in any way ? I would leave it to the administrator if they want to use the same SA or the different ones. Regards Mukesh From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 30 17:03:40 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id RAA21531 for ; Thu, 30 Dec 2004 17:03:39 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <10.00F2ADDA@cherry.ease.lsoft.com>; Thu, 30 Dec 2004 17:03:41 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51315660 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 30 Dec 2004 17:03:38 -0500 Received: from 63.113.148.10 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Thu, 30 Dec 2004 17:03:37 -0500 Received: from mgate1.riverstonenet.com by riverstonenet.com (8.9.3+Sun/SMI-SVR4-Yago) id OAA04068; Thu, 30 Dec 2004 14:03:38 -0800 (PST) Received: (from daemon@localhost) by mgate1.riverstonenet.com (8.13.1/8.13.1) id iBUM3bhk008542; Thu, 30 Dec 2004 14:03:37 -0800 (PST) X-Authentication-Warning: mgate1.riverstonenet.com: Processed by daemon with -C /etc/mail/sendmail-simple.cf Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by mgate1.riverstonenet.com (8.13.1/8.13.1) with ESMTP id iBUM3VKq008522 for ; Thu, 30 Dec 2004 14:03:33 -0800 (PST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <11.00F2AC3C@cherry.ease.lsoft.com>; Thu, 30 Dec 2004 17:03:17 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51315505 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 30 Dec 2004 17:03:00 -0500 Received: from 131.228.20.21 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Thu, 30 Dec 2004 17:02:59 -0500 Received: from esdks002.ntc.nokia.com (esdks002.ntc.nokia.com [172.21.138.121]) by mgw-x1.nokia.com (Switch-2.2.8/Switch-2.2.8) with ESMTP id iBUM2wD00063 for ; Fri, 31 Dec 2004 00:02:59 +0200 (EET) X-Scanned: Fri, 31 Dec 2004 00:02:26 +0200 Nokia Message Protector V1.3.34 2004121512 - RELEASE Received: (from root@localhost) by esdks002.ntc.nokia.com (8.12.9/8.12.9) id iBUM2QcT016969 for ; Fri, 31 Dec 2004 00:02:26 +0200 Received: from mgw-int1.ntc.nokia.com (172.21.143.96) by esdks002.ntc.nokia.com 00vxEk6Q; Fri, 31 Dec 2004 00:02:26 EET Received: from daebh001.NOE.Nokia.com (daebh001.americas.nokia.com [10.241.35.121]) by mgw-int1.ntc.nokia.com (Switch-2.2.8/Switch-2.2.8) with ESMTP id iBUM2OU09434 for ; Fri, 31 Dec 2004 00:02:24 +0200 (EET) Received: from daebe009.NOE.Nokia.com ([10.241.35.109]) by daebh001.NOE.Nokia.com with Microsoft SMTPSVC(5.0.2195.6881); Thu, 30 Dec 2004 16:01:20 -0600 X-MimeOLE: Produced By Microsoft Exchange V6.0.6487.1 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Thread-Topic: I-D ACTION:draft-ietf-ospf-ospfv3-auth-06.txt thread-index: AcTt6Ey108ldSj9qSBG6qc/YgFidaAAAy/6AABBUfKoAHi1O8A== X-OriginalArrivalTime: 30 Dec 2004 22:01:20.0557 (UTC) FILETIME=[1833F5D0:01C4EEBB] Precedence: list X-Spam-Status: No, score=0.0 required=4.0 tests=none autolearn=failed version=3.0.1 X-Spam-Checker-Version: SpamAssassin 3.0.1 (2004-10-22) on mgate1.riverstonenet.com Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mgate1.riverstonenet.com id iBUM3VKq008522 Message-ID: <8D260779A766FB4A9C1739A476F84FA401F79BA8@daebe009.americas.nokia.com> Date: Thu, 30 Dec 2004 16:01:19 -0600 Reply-To: Mailing List Sender: Mailing List From: Mukesh Gupta Subject: Re: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review To: OSPF@PEACH.EASE.LSOFT.COM Content-Transfer-Encoding: 8bit Vishwas, Thanks for reviewing the draft again. Please see my comments inline.. > 1. In the draft you state that there are know known problems > of replaying DB packets. Replaying a DB packet can result in > the entrie database being exchanged again which is a CPU > heavy process. > 2. Similar issues with LS request packets. Though we trusted section 3.2.3 of the draft draft-ietf-rpsec-ospf-vuln-01.txt to make those statements, isn't it true that the duplicate DD packets are just discarded if the adjacency is already in FULL state ? Yes there are resource consumption problems with replayed LSR packets. Should we replace text "There are no known threats of replaying these type of packets." with "There are no known threats of replaying these type of packets except that the receiving router will have to spend some resources to handle these packets." > 3. Though we have addressed the case of specifying some > default/supported values, I think we do not do that for all > optional parameters. e.g. ESN etc. Sorry ! I do not understand which default/supported values you are talking about here :( Could you please be a little more specific? > 4. We can have multiple SA's between two routers. When DSCP > is supported should the same SA be used or should multiple > SA's be used? Do you see any problems in any way ? I would leave it to the administrator if they want to use the same SA or the different ones. Regards Mukesh From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 30 17:15:02 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id RAA22329 for ; Thu, 30 Dec 2004 17:15:02 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <18.00F2AB73@cherry.ease.lsoft.com>; Thu, 30 Dec 2004 17:15:03 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51316654 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 30 Dec 2004 17:15:01 -0500 Received: from 131.228.20.27 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Thu, 30 Dec 2004 17:15:00 -0500 Received: from esdks003.ntc.nokia.com (esdks003.ntc.nokia.com [172.21.138.158]) by mgw-x4.nokia.com (Switch-2.2.8/Switch-2.2.8) with ESMTP id iBUMF0K17039 for ; Fri, 31 Dec 2004 00:15:00 +0200 (EET) X-Scanned: Fri, 31 Dec 2004 00:14:27 +0200 Nokia Message Protector V1.3.34 2004121512 - RELEASE Received: (from root@localhost) by esdks003.ntc.nokia.com (8.12.9/8.12.9) id iBUMERdN032496 for ; Fri, 31 Dec 2004 00:14:27 +0200 Received: from mgw-int1.ntc.nokia.com (172.21.143.96) by esdks003.ntc.nokia.com 00CYBC0D; Fri, 31 Dec 2004 00:14:25 EET Received: from daebh002.NOE.Nokia.com (daebh002.americas.nokia.com [10.241.35.122]) by mgw-int1.ntc.nokia.com (Switch-2.2.8/Switch-2.2.8) with ESMTP id iBUMEOU18932 for ; Fri, 31 Dec 2004 00:14:24 +0200 (EET) Received: from daebe009.NOE.Nokia.com ([10.241.35.109]) by daebh002.NOE.Nokia.com with Microsoft SMTPSVC(5.0.2195.6881); Thu, 30 Dec 2004 16:14:23 -0600 X-MimeOLE: Produced By Microsoft Exchange V6.0.6487.1 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thread-Topic: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review thread-index: AcTuNCyZyn9vDJkgR2uoT7vU2kWhqwAhvbVQ X-OriginalArrivalTime: 30 Dec 2004 22:14:23.0308 (UTC) FILETIME=[EAC248C0:01C4EEBC] Message-ID: <8D260779A766FB4A9C1739A476F84FA401F79BA9@daebe009.americas.nokia.com> Date: Thu, 30 Dec 2004 16:14:23 -0600 Reply-To: Mailing List Sender: Mailing List From: Mukesh Gupta Subject: Re: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list Content-Transfer-Encoding: quoted-printable Vishwas, Comments inline... > 1. In "Rekeying Interval" You are giving examples only for=20 > ESP, but it is never stated that we are talking only of=20 > ESP(and not AH). We wanted to keep the section general without making it specific to ESP or AH. So when we say "Null encryption with MD5 authentication", it could be used either with ESP or with AH. Do we need to add more text to make it clearer? Do you any have specific changes in mind ? > 2. You state=20 > " DES Encryption and HMAC-MD5 Authentication will be more secure > because of the additional security provided by DES" > but the draft draft-ietf-ipsec-esp-ah-algorithms-02.txt > very clearly states that for AH/ESP we should not use DES > (for well known reasons) "SHOULD NOT DES-CBC [RFC 2405] (3)". > I am not sure if we want to mention DES at all. Well, the draft does not recommend using DES either. We just wanted to compare some non-null encryption schemes with null encryption schemes and we chose des, 3des and AES. The draft mandates the usage of AES so it is inline with the other IPsec drafts. > 3. The section 12, is states the mandatory "encryption=20 > and authentication algorithms" but does not state the key=20 > size to be used for AES-CBC. All the IPsec implementations that support AES for IPsec MUST support 128 bit key size (RFC 3602). So are we not ok without mentioning the key sizes in this draft and just referring to 3602? > 4. On another front instead of having one draft specifying=20 > both the support as well as the algorithm's used, would we=20 > want a seperate draft for supported algorithms. This allows=20 > us to change the supported algorithms even when the base=20 > OSPFv3 for IPSec stays the same e.g. when vulnerabilities=20 > are found in the algorithm or when key sizes have to be=20 > made bigger. This is how it is done in the IPSec working=20 > group too(where AH/ESP algorithm's have been seperated=20 > from the supported algorithms). We had taken this approach in previous revs (04, I guess) but Security ADs (Russ) wanted to have at least one algorithm required by this draft just to make sure that the=20 implementations were interoperable. We added AES/SHA1 as mandatory as suggested by Russ. Regards Mukesh From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 30 17:15:09 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id RAA22350 for ; Thu, 30 Dec 2004 17:15:08 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <7.00F2AD85@cherry.ease.lsoft.com>; Thu, 30 Dec 2004 17:15:09 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51316691 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 30 Dec 2004 17:15:07 -0500 Received: from 63.113.148.10 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Thu, 30 Dec 2004 17:15:07 -0500 Received: from mgate1.riverstonenet.com by riverstonenet.com (8.9.3+Sun/SMI-SVR4-Yago) id OAA05247; Thu, 30 Dec 2004 14:15:07 -0800 (PST) Received: (from daemon@localhost) by mgate1.riverstonenet.com (8.13.1/8.13.1) id iBUMF7Ob009265; Thu, 30 Dec 2004 14:15:07 -0800 (PST) X-Authentication-Warning: mgate1.riverstonenet.com: Processed by daemon with -C /etc/mail/sendmail-simple.cf Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by mgate1.riverstonenet.com (8.13.1/8.13.1) with ESMTP id iBUMF4lD009251 for ; Thu, 30 Dec 2004 14:15:05 -0800 (PST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <18.00F2AB73@cherry.ease.lsoft.com>; Thu, 30 Dec 2004 17:15:03 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51316654 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 30 Dec 2004 17:15:01 -0500 Received: from 131.228.20.27 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Thu, 30 Dec 2004 17:15:00 -0500 Received: from esdks003.ntc.nokia.com (esdks003.ntc.nokia.com [172.21.138.158]) by mgw-x4.nokia.com (Switch-2.2.8/Switch-2.2.8) with ESMTP id iBUMF0K17039 for ; Fri, 31 Dec 2004 00:15:00 +0200 (EET) X-Scanned: Fri, 31 Dec 2004 00:14:27 +0200 Nokia Message Protector V1.3.34 2004121512 - RELEASE Received: (from root@localhost) by esdks003.ntc.nokia.com (8.12.9/8.12.9) id iBUMERdN032496 for ; Fri, 31 Dec 2004 00:14:27 +0200 Received: from mgw-int1.ntc.nokia.com (172.21.143.96) by esdks003.ntc.nokia.com 00CYBC0D; Fri, 31 Dec 2004 00:14:25 EET Received: from daebh002.NOE.Nokia.com (daebh002.americas.nokia.com [10.241.35.122]) by mgw-int1.ntc.nokia.com (Switch-2.2.8/Switch-2.2.8) with ESMTP id iBUMEOU18932 for ; Fri, 31 Dec 2004 00:14:24 +0200 (EET) Received: from daebe009.NOE.Nokia.com ([10.241.35.109]) by daebh002.NOE.Nokia.com with Microsoft SMTPSVC(5.0.2195.6881); Thu, 30 Dec 2004 16:14:23 -0600 X-MimeOLE: Produced By Microsoft Exchange V6.0.6487.1 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Thread-Topic: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review thread-index: AcTuNCyZyn9vDJkgR2uoT7vU2kWhqwAhvbVQ X-OriginalArrivalTime: 30 Dec 2004 22:14:23.0308 (UTC) FILETIME=[EAC248C0:01C4EEBC] Precedence: list X-Spam-Status: No, score=0.0 required=4.0 tests=none autolearn=failed version=3.0.1 X-Spam-Checker-Version: SpamAssassin 3.0.1 (2004-10-22) on mgate1.riverstonenet.com Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mgate1.riverstonenet.com id iBUMF4lD009251 Message-ID: <8D260779A766FB4A9C1739A476F84FA401F79BA9@daebe009.americas.nokia.com> Date: Thu, 30 Dec 2004 16:14:23 -0600 Reply-To: Mailing List Sender: Mailing List From: Mukesh Gupta Subject: Re: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review To: OSPF@PEACH.EASE.LSOFT.COM Content-Transfer-Encoding: 8bit Vishwas, Comments inline... > 1. In "Rekeying Interval" You are giving examples only for > ESP, but it is never stated that we are talking only of > ESP(and not AH). We wanted to keep the section general without making it specific to ESP or AH. So when we say "Null encryption with MD5 authentication", it could be used either with ESP or with AH. Do we need to add more text to make it clearer? Do you any have specific changes in mind ? > 2. You state > " DES Encryption and HMAC-MD5 Authentication will be more secure > because of the additional security provided by DES" > but the draft draft-ietf-ipsec-esp-ah-algorithms-02.txt > very clearly states that for AH/ESP we should not use DES > (for well known reasons) "SHOULD NOT DES-CBC [RFC 2405] (3)". > I am not sure if we want to mention DES at all. Well, the draft does not recommend using DES either. We just wanted to compare some non-null encryption schemes with null encryption schemes and we chose des, 3des and AES. The draft mandates the usage of AES so it is inline with the other IPsec drafts. > 3. The section 12, is states the mandatory "encryption > and authentication algorithms" but does not state the key > size to be used for AES-CBC. All the IPsec implementations that support AES for IPsec MUST support 128 bit key size (RFC 3602). So are we not ok without mentioning the key sizes in this draft and just referring to 3602? > 4. On another front instead of having one draft specifying > both the support as well as the algorithm's used, would we > want a seperate draft for supported algorithms. This allows > us to change the supported algorithms even when the base > OSPFv3 for IPSec stays the same e.g. when vulnerabilities > are found in the algorithm or when key sizes have to be > made bigger. This is how it is done in the IPSec working > group too(where AH/ESP algorithm's have been seperated > from the supported algorithms). We had taken this approach in previous revs (04, I guess) but Security ADs (Russ) wanted to have at least one algorithm required by this draft just to make sure that the implementations were interoperable. We added AES/SHA1 as mandatory as suggested by Russ. Regards Mukesh From owner-ospf@PEACH.EASE.LSOFT.COM Thu Dec 30 23:29:10 2004 Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id XAA14108 for ; Thu, 30 Dec 2004 23:29:09 -0500 (EST) Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <14.00F2B1E3@cherry.ease.lsoft.com>; Thu, 30 Dec 2004 23:29:05 -0500 Received: by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 14.3) with spool id 51340402 for OSPF@PEACH.EASE.LSOFT.COM; Thu, 30 Dec 2004 23:29:03 -0500 Received: from 63.197.255.158 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0l) with TCP; Thu, 30 Dec 2004 23:29:03 -0500 X-MimeOLE: Produced By Microsoft Exchange V6.5.6944.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C4EEF2.7C92017A" Thread-Topic: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review thread-index: AcTuNCyZyn9vDJkgR2uoT7vU2kWhqwAhvbVQAA235jg= Message-ID: Date: Thu, 30 Dec 2004 20:34:27 -0800 Reply-To: Mailing List Sender: Mailing List From: Vishwas Manral Subject: Re: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG review To: OSPF@PEACH.EASE.LSOFT.COM Precedence: list This is a multi-part message in MIME format. ------_=_NextPart_001_01C4EEF2.7C92017A Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Mukesh, My comments prefixed with a VM>. > We wanted to keep the section general without making it > specific to ESP or AH. So when we say "Null encryption with > MD5 authentication", it could be used either with ESP or > with AH. Do we need to add more text to make it clearer? > Do you any have specific changes in mind ? VM> I do not agree when you say NULL encryption it can refer to AH, I=20 think it means only ESP. NULL Encryption can be treated equivalent=20 to any other encryption algorithm atleast that is what I know of. > Well, the draft does not recommend using DES either. We just > wanted to compare some non-null encryption schemes with null > encryption schemes and we chose des, 3des and AES. The draft > mandates the usage of AES so it is inline with the other > IPsec drafts. VM> I do not think we should use examples of schemes, which have been=20 mentioned as "SHOULD NOT" by the IETF/NIST. > All the IPsec implementations that support AES for IPsec > MUST support 128 bit key size (RFC 3602). So are we not > ok without mentioning the key sizes in this draft and just=20 > referring to 3602? VM> Mukesh I am comming more from the point of view of=20 draft-ietf-ipsec-esp-ah-algorithms-02.txt, which also seems to specify the key size. IT is the document for ESP/AH=20 specifying mandatory protocols. > We had taken this approach in previous revs (04, I guess) > but Security ADs (Russ) wanted to have at least one algorithm > required by this draft just to make sure that the > implementations were interoperable. We added AES/SHA1 > as mandatory as suggested by Russ. VM> I guess I should have been clearer. I agree and infact had asked for the same thing in my previous review. I am asking is that we have another companion draft specifying the mandatory algorithms as is done for IPSec/IKE etc. It helps becuase as and when we move=20 forward and algorithms change we just need to change that document=20 rather then the whole IPSec for OSPF document. >"There are no known threats of replaying these type of packets." > with > "There are no known threats of replaying these type of packets > except that the receiving router will have to spend some resources > to handle these packets." VM> I agree, however I think one more point we miss is that, when=20 adjacencies are not full the link is not used for transit data traffic. In the sense its a clear DoS attack where we can make the link unusable. I have already told the OSPF Vulnerabilities draft authors about the=20 same. This also causes transient loops because of changing topologies. > Sorry ! I do not understand which default/supported values > you are talking about here :( Could you please be a little > more specific? VM> As you stated that Russ specified(and I totally agree) some minimal=20 options for implementations to interoperate is necessary(and I think the primary aim of this draft). We should specify if we are using = options Extended Sequence Numbers(ESN) or not at the minimum etc. The reason is the same for DSCP, check the recent discussion on http://www1.ietf.org/mail-archive/web/ipsec/current/index.html I had = with=20 Steve Kent and the changes being made to the IPSec security architecture = document because of that. VM> Mukesh, I also noted that recommendation of changes for the MIB is = not=20 made in the draft Would there be any changes to the MIB? Thanks, Vishwas =20 ------_=_NextPart_001_01C4EEF2.7C92017A Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable =0A= =0A= =0A= =0A= =0A= =0A= Re: draft-ietf-ospf-ospfv3-auth-06.txt Ready for IESG = review=0A= =0A= =0A=

Hi Mukesh,

=0A=

My comments prefixed with a VM>.
> We wanted to keep the = section =0A= general without making it
> specific to ESP or AH.  So when = we say =0A= "Null encryption with
> MD5 authentication", it could be used = either with =0A= ESP or
> with AH.  Do we need to add more text to make it =0A= clearer?
> Do you any have specific changes in mind ?
VM> I = do not =0A= agree when you say NULL encryption it can refer to AH, I
think it = means only =0A= ESP. NULL Encryption can be treated equivalent
to any other = encryption =0A= algorithm atleast that is what I know of.

=0A=

> Well, the draft does not recommend using DES either. We = just
> =0A= wanted to compare some non-null encryption schemes with null
> = encryption =0A= schemes and we chose des, 3des and AES.  The draft
> mandates = the =0A= usage of AES so it is inline with the other
> IPsec = drafts.
VM> I do =0A= not think we should use examples of schemes, which have been =
mentioned as =0A= "SHOULD NOT" by the IETF/NIST.

=0A=

> All the IPsec implementations that support AES for IPsec
> = MUST =0A= support 128 bit key size (RFC 3602).  So are we not
> ok = without =0A= mentioning the key sizes in this draft and just
> referring to =0A= 3602?
VM> Mukesh I am comming more from the point of view of =0A=
draft-ietf-ipsec-esp-ah-algorithms-02.txt, which also seems
to = specify =0A= the key size. IT is the document for ESP/AH
specifying mandatory =0A= protocols.

=0A=

> We had taken this approach in previous revs (04, I = guess)
> but =0A= Security ADs (Russ) wanted to have at least one algorithm
> = required by =0A= this draft just to make sure that the
> implementations were =0A= interoperable.  We added AES/SHA1
> as mandatory as suggested = by =0A= Russ.
VM> I guess I should have been clearer. I agree and infact = had =0A= asked
for the same thing in my previous review. I am asking is = that
we =0A= have another companion draft specifying the mandatory algorithms
as = is done =0A= for IPSec/IKE etc. It helps becuase as and when we move
forward and =0A= algorithms change we just need to change that document
rather then = the whole =0A= IPSec for OSPF document.

=0A=

>"There are no known threats of replaying these type of = packets."
> =0A= with
> "There are no known threats of replaying these type of =0A= packets
> except that the receiving router will have to spend some =0A= resources
> to handle these packets."
VM> I agree, however I = think =0A= one more point we miss is that, when
adjacencies are not full the = link is =0A= not used for transit data traffic.
In the sense its a clear DoS = attack where =0A= we can make the link unusable.
I have already told the OSPF = Vulnerabilities =0A= draft authors about the
same. This also causes transient loops = because of =0A= changing topologies.

=0A=

> Sorry ! I do not understand which default/supported = values
> you =0A= are talking about here :(  Could you please be a little
> = more =0A= specific?
VM> As you stated that Russ specified(and I totally = agree) some =0A= minimal
options for implementations to interoperate is necessary(and = I =0A= think
the primary aim of this draft). We should specify if we are = using =0A= options
Extended Sequence Numbers(ESN) or not at the minimum etc. The = reason =0A= is
the same for DSCP, check the recent discussion on
h= ttp://www1.ietf.org/mail-archive/web/ipsec/current/index.html =0A= I had with
Steve Kent and the changes being made to the IPSec = security =0A= architecture
document because of that.

=0A=

VM> Mukesh, I also noted that recommendation of changes for the = MIB is not =0A=
made in the draft Would there be any changes to the MIB?

=0A=

Thanks,
Vishwas

=0A=

 

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