Re: [Isis-wg] New Version Notification for draft-ginsberg-isis-sbfd-discriminator-00.txt
"Les Ginsberg (ginsberg)" <ginsberg@cisco.com> Wed, 14 May 2014 15:40 UTC
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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Hannes Gredler <hannes@juniper.net>
Thread-Topic: [Isis-wg] New Version Notification for draft-ginsberg-isis-sbfd-discriminator-00.txt
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Date: Wed, 14 May 2014 15:40:31 +0000
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Subject: Re: [Isis-wg] New Version Notification for draft-ginsberg-isis-sbfd-discriminator-00.txt
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Hannes - > -----Original Message----- > From: Hannes Gredler [mailto:hannes@juniper.net] > Sent: Wednesday, May 14, 2014 8:27 AM > To: Les Ginsberg (ginsberg) > Cc: isis-wg@ietf.org; rtg-bfd@ietf.org > Subject: Re: [Isis-wg] New Version Notification for draft-ginsberg-isis-sbfd- > discriminator-00.txt > > > On May 14, 2014, at 5:22 PM, Les Ginsberg (ginsberg) wrote: > > > Hannes - > > > > Thanx for the comments. > > I don't see how your proposal solves the problem you are attempting to > address. The sender of the S-BFD packet has no control over what interface > is used to receive the packet on the target node. Associating it with a prefix > will not help in that regard. > > well it would help first endpoint discovery and pinning down BFD traffic to > particular line card. As I stated, the sender does not control the path to the reflector (S-BFD is not just single-hop). So we do not have the ability to control what line card will receive the packet simply by associating an S-BFD discriminator with a prefix advertisement. > > > Further, the potential use of multiple S-BFD discriminator values by a > given node gets into an application area that we have deliberately avoided. > One can imagine that S-BFD may want to use different discriminator values > for much more than just different address families - in which case the > mapping between a given discriminator and a given usage will not be > addressed simply by associating the discriminator with an IPv4/IPv6 > address. Such cases will no doubt be discussed within BFD WG as part of the > S-BFD work - but at this point we really want to keep the IGP > advertisements out of this area. > > > > i am just saying 1 discriminator seems overly restrictive to me and > having support for more-than 1 would be a good idea to start with; The draft allows the advertisement of multiple discriminators. How those discriminators get mapped to particular use cases is out of scope. From Section 2: "When multiple S-BFD discriminators are advertised how a given discriminator is mapped to a specific use case is out of scope for this document." Les > > > >> -----Original Message----- > >> From: Hannes Gredler [mailto:hannes@juniper.net] > >> Sent: Wednesday, May 14, 2014 7:08 AM > >> To: Les Ginsberg (ginsberg) > >> Cc: isis-wg@ietf.org; rtg-bfd@ietf.org > >> Subject: Re: [Isis-wg] New Version Notification for draft-ginsberg-isis- > sbfd- > >> discriminator-00.txt > >> > >> hi les, > >> > >> making the S-BFD discriminator a sole node-property feels a bit coarse > >> for my taste. i'd rather carry this in a IP prefix advertisement, > >> such that i have more granular control *what* (particular links/loopback > >> etc.) > >> gets BFD-tested. also i'd would like that the receiver gets some idea what > >> address family (v4/v6) a S-BFD is related to. > >> > >> /hannes > >> > >> On May 8, 2014, at 4:48 PM, Les Ginsberg (ginsberg) wrote: > >> > >>> FYI - this new draft describes how to advertise S-BFD Discriminators > using > >> IS-IS. > >>> > >>> Comments are welcomed. > >>> > >>> Les > >>> > >>> > >>> -----Original Message----- > >>> From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] > >>> Sent: Thursday, May 08, 2014 7:46 AM > >>> To: Mach Chen; Nobo Akiya (nobo); Mach Chen; Les Ginsberg (ginsberg); > >> Nobo Akiya (nobo); Les Ginsberg (ginsberg) > >>> Subject: New Version Notification for draft-ginsberg-isis-sbfd- > >> discriminator-00.txt > >>> > >>> > >>> A new version of I-D, draft-ginsberg-isis-sbfd-discriminator-00.txt > >>> has been successfully submitted by Les Ginsberg and posted to the > >>> IETF repository. > >>> > >>> Name: draft-ginsberg-isis-sbfd-discriminator > >>> Revision: 00 > >>> Title: Advertising S-BFD Discriminators in IS-IS > >>> Document date: 2014-05-08 > >>> Group: Individual Submission > >>> Pages: 5 > >>> URL: http://www.ietf.org/internet-drafts/draft-ginsberg-isis-sbfd- > >> discriminator-00.txt > >>> Status: https://datatracker.ietf.org/doc/draft-ginsberg-isis-sbfd- > >> discriminator/ > >>> Htmlized: http://tools.ietf.org/html/draft-ginsberg-isis-sbfd- > >> discriminator-00 > >>> > >>> > >>> Abstract: > >>> This document defines a means of advertising one or more S-BFD > >>> Discriminators using the IS-IS Router Capability TLV. > >>> > >>> > >>> > >>> > >>> > >>> Please note that it may take a couple of minutes from the time of > >> submission > >>> until the htmlized version and diff are available at tools.ietf.org. > >>> > >>> The IETF Secretariat > >>> > >>> _______________________________________________ > >>> Isis-wg mailing list > >>> Isis-wg@ietf.org > >>> https://www.ietf.org/mailman/listinfo/isis-wg > >
- [Isis-wg] FW: New Version Notification for draft-… Les Ginsberg (ginsberg)
- Re: [Isis-wg] FW: New Version Notification for dr… Les Ginsberg (ginsberg)
- Re: [Isis-wg] FW: New Version Notification for dr… Sam Aldrin
- Re: [Isis-wg] FW: New Version Notification for dr… Les Ginsberg (ginsberg)
- Re: [Isis-wg] FW: New Version Notification for dr… Jeffrey Haas
- Re: [Isis-wg] FW: New Version Notification for dr… Jeffrey Haas
- Re: [Isis-wg] FW: New Version Notification for dr… Jeffrey Haas
- Re: [Isis-wg] New Version Notification for draft-… Hannes Gredler
- Re: [Isis-wg] New Version Notification for draft-… Hannes Gredler
- Re: [Isis-wg] New Version Notification for draft-… Les Ginsberg (ginsberg)
- Re: [Isis-wg] New Version Notification for draft-… Les Ginsberg (ginsberg)
- Re: [Isis-wg] New Version Notification for draft-… Hannes Gredler
- Re: [Isis-wg] New Version Notification for draft-… Hannes Gredler
- Re: [Isis-wg] New Version Notification for draft-… Les Ginsberg (ginsberg)
- Re: [Isis-wg] New Version Notification for draft-… Jeffrey Haas
- Re: [Isis-wg] New Version Notification for draft-… Les Ginsberg (ginsberg)
- Re: [Isis-wg] New Version Notification for draft-… Nobo Akiya (nobo)
- Re: [Isis-wg] New Version Notification for draft-… Hannes Gredler
- Re: [Isis-wg] New Version Notification for draft-… Nobo Akiya (nobo)
- Re: [Isis-wg] New Version Notification for draft-… Hannes Gredler
- Re: [Isis-wg] New Version Notification for draft-… Nobo Akiya (nobo)
- Re: [Isis-wg] New Version Notification for draft-… Mach Chen
- Re: [Isis-wg] New Version Notification for draft-… Mach Chen
- Re: [Isis-wg] New Version Notification for draft-… Les Ginsberg (ginsberg)
- Re: [Isis-wg] New Version Notification for draft-… Nobo Akiya (nobo)
- Re: [Isis-wg] New Version Notification for draft-… Mach Chen
- Re: [Isis-wg] New Version Notification for draft-… Hannes Gredler
- Re: [Isis-wg] New Version Notification for draft-… Gregory Mirsky
- Re: [Isis-wg] New Version Notification for draft-… Nobo Akiya (nobo)
- Re: [Isis-wg] New Version Notification for draft-… Gregory Mirsky
- Re: [Isis-wg] New Version Notification for draft-… Nobo Akiya (nobo)
- Re: [Isis-wg] New Version Notification for draft-… Mach Chen
- Re: [Isis-wg] New Version/Proposed isis-wg docume… Marc Binderberger
- Re: [Isis-wg] New Version/Proposed isis-wg docume… Les Ginsberg (ginsberg)