Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Originator Id)
"Les Ginsberg (ginsberg)" <ginsberg@cisco.com> Fri, 14 May 2010 01:24 UTC
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Date: Thu, 13 May 2010 18:24:13 -0700
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Thread-Topic: [Isis-wg] draft-wei-isis-tlv-03 (Purge Originator Id)
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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Tony Li <tony.li@tony.li>, Dave Katz <dkatz@juniper.net>
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Cc: "bruno.decraene@orange-ftgroup.co" <bruno.decraene@orange-ftgroup.com>, weifang@chinamobile.com, lizhenqiang@chinamobile.com, isis-wg@ietf.org
Subject: Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Originator Id)
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Folks - Any reason why draft-ietf-isis-purge-tlv-01 (or at least the 00 version allegedly submitted some time back) is not posted? We did accept this as a WG doc did we not?? Les > -----Original Message----- > From: Tony Li [mailto:tony.li@tony.li] > Sent: Friday, April 23, 2010 4:50 PM > To: Dave Katz; Les Ginsberg (ginsberg) > Cc: lizhenqiang@chinamobile.com; Jie Dong; bruno.decraene@orange- > ftgroup.co; isis-wg@ietf.org; weifang@chinamobile.com > Subject: Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Originator Id) > > > So I have aversion (perhaps irrational ;-) to overloading semantics > into the length field. So I've actually added the flag. > > I've also addressed a number of comments, both on list and privately, > so this is worth a full read. > > Comments? > > Tony > > > > On 4/23/10 10:57 AM, "Dave Katz" <dkatz@juniper.net> wrote: > > > This seems to make sense so long as the absence of the neighbor field > > unambiguously says that the inserting system is also the originator > of > > the purge (otherwise you need a flag.) > > > > --Dave > > > > On Apr 22, 2010, at 2:39 PM, Les Ginsberg (ginsberg) wrote: > > > >> One other suggestion. > >> > >> The usefulness of the extensions defined in this draft depend upon > >> the extent to which they are deployed - which no doubt will take > >> considerable time under the best of circumstances. It seems that we > >> could enhance the usefulness of the extensions even in the case of > >> partial deployment by allowing an IS which supports these extensions > >> to add the new TLV to purges it receives that do not include the new > TLV. > >> It could include both its own system ID (to identify who added the > >> TLV) and the system ID of the neighbor from whom the empty purge was > >> received. While this is not guaranteed to pinpoint the source of the > >> purge, it would at least provide a pointer to the portion of the > >> network in which the purge originated. > >> > >> So the TLV would then look like: > >> > >> TLV - code to be assigned by IANA > >> Length - Either (1 * systemid length) or (2 *system ID length) Value > >> - System ID of the system inserting the TLV (Required) System ID of > >> the system from which the purge was received (Optional) > >> > >> ??? > >> > >> Les > >> > >>> -----Original Message----- > >>> From: isis-wg-bounces@ietf.org [mailto:isis-wg-bounces@ietf.org] On > >>> Behalf Of Tony Li > >>> Sent: Wednesday, April 21, 2010 11:39 PM > >>> To: Les Ginsberg (ginsberg); lizhenqiang@chinamobile.com; Jie Dong; > >>> bruno.decraene@orange-ftgroup.co; isis-wg@ietf.org; > >>> weifang@chinamobile.com > >>> Subject: Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Originator Id) > >>> > >>> > >>> Hi Les, > >>> > >>>> But hopefully we can comment on 01 anyway?? :-) > >>> > >>> Of course! ;-) > >>> > >>>> I don't see the need for Section 3. It was interesting discussion > >>>> material while we were debating the merits of making this a WG > >>> document, > >>>> but I think it has drawbacks when it is included in what is > >>>> intended > >>> to > >>>> become a standards document. > >>> > >>> Well, the point was to help document some of the field failures > that > >>> we've seen and motivate the changes. > >>> > >>>> In the second set of three points, only the first (which documents > >>> the > >>>> lamentable purge on checksum error experience) has value. The last > >>> two > >>>> are anecdotal and could be translated as "there are some weird > bugs > >>> out > >>>> there". Interesting - but unnecessary. The first point could be > >>>> mentioned in the introduction as part of the justification for the > >>>> protocol extensions - but I think even that is unnecessary. > >>> > >>> True, but without the background, these changes would seem like > >>> something straight out of the Oort cloud. > >>> > >>> Compromise: condense the text and move to the introduction? > >>> > >>> > >>>> In Section 5 I would like to see language which says "hostname TLV > >>>> SHOULD only be used in addition to the system ID TLV". As every IS > >>> MUST > >>>> have a unique systemID but hostnames are optional I would prefer > >> that > >>> if > >>>> an implementation chooses to include the extra info in the purge > >> that > >>>> the system ID ALWAYS be there. (This is unenforceable of course) > >>> > >>> > >>> Works for me. Other folks? > >>> > >>> > >>>> I think there needs to be language which makes clear that the > >> absence > >>> or > >>>> presence of this additional information has no impact on the > >>> acceptance > >>>> of a purged LSP as valid i.e. no changes to the operation of the > >>> Update > >>>> process are introduced by this draft. > >>> > >>> > >>> Can't hurt. I'm certain that this will break some conformance > >>> testers regardless. > >>> > >>> Any other comments? > >>> > >>> Tony > >>> > >>> > >>> _______________________________________________ > >>> Isis-wg mailing list > >>> Isis-wg@ietf.org > >>> https://www.ietf.org/mailman/listinfo/isis-wg > >> _______________________________________________ > >> Isis-wg mailing list > >> Isis-wg@ietf.org > >> https://www.ietf.org/mailman/listinfo/isis-wg > >> > >
- [Isis-wg] draft-wei-isis-tlv-03 (Purge Originator… bruno.decraene
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Jie Dong
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… bruno.decraene
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… bruno.decraene
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Jie Dong
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Tony Li
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… lizhenqiang
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Tony Li
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Les Ginsberg (ginsberg)
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Tony Li
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Les Ginsberg (ginsberg)
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Les Ginsberg (ginsberg)
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… mike shand
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… lizhenqiang
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… lizhenqiang
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Les Ginsberg (ginsberg)
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Les Ginsberg (ginsberg)
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Les Ginsberg (ginsberg)
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Dave Katz
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Tony Li
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Les Ginsberg (ginsberg)
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Les Ginsberg (ginsberg)
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Les Ginsberg (ginsberg)
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Tony Li
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Dave Katz
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Les Ginsberg (ginsberg)
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Tony Li
- Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Origin… Christian Hopps