Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt
Job Snijders <job@ntt.net> Mon, 03 July 2017 21:10 UTC
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From: Job Snijders <job@ntt.net>
Date: Mon, 03 Jul 2017 21:10:11 +0000
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To: Job Snijders <job@ntt.net>, Randy Bush <randy@psg.com>
Cc: Gert Doering <gert@space.net>, idr@ietf.org
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Subject: Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt
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On Mon, 3 Jul 2017 at 22:53, Randy Bush <randy@psg.com> wrote: > > I don't follow. If the route server facilitates you in setting up BFD to > > all "nexthops of interest", the route server's job is done, right? Any RS > > peer has the ability to locally verify reacahbility across the fabric and > > route accordingly. > > route servers are for the small folk who can not do full mesh, let alone > add path and other fancy things. the rs IS their control plane, period. > If a device can't do add-path, can we really expect these devices to do fancy things like opportunistic "route server assisted" BFD to all next-hops of interest? If we operate under the assumption that these clients can't support receiving multiple paths through add-path, I envision a somewhat ugly cadence: 1) Hey RS, can't reach A 2) Ok, here try reaching A via B 3) hey RS, I can't reach B either Etc, etc The above scenario might look small, but often problems at IXPs don't affect (isolate) a single participant, but rather clusters of participants. A challenging aspect of IXPs are the "ISLs" between sites. If the RS is to receive and keep track of the state of who can reach who, it should somehow create a clear benefit that visibly reduces the load on the participant's devices. If the only benefit is "if the RS keeps track of this state, the participant doesn't need to support ADD-PATH (but only draft-ietf-idr-rs-bfd)", I'm skeptical whether I can get behind that reasoning. Kind regards, Job
- [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt internet-drafts
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt John G. Scudder
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt John G. Scudder
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Gert Doering
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Randy Bush
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Randy Bush
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Gert Doering
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Gert Doering
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Randy Bush
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt John G. Scudder
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt John Scudder
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt John Scudder
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Gert Doering
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Gert Doering
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt John G. Scudder
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt John G. Scudder
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jared Mauch
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt John Scudder
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt John G. Scudder
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt John G. Scudder
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jakob Heitz (jheitz)
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt John Scudder
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jakob Heitz (jheitz)
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Randy Bush
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt John Scudder
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jakob Heitz (jheitz)
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jakob Heitz (jheitz)
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jakob Heitz (jheitz)
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Jakob Heitz (jheitz)
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Arnold Nipper
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt Robert Raszuk