Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt
Robert Raszuk <robert@raszuk.net> Mon, 13 March 2017 10:45 UTC
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From: Robert Raszuk <robert@raszuk.net>
Date: Mon, 13 Mar 2017 11:45:25 +0100
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To: Nick Hilliard <nick@foobar.org>
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Subject: Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt
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Nick, I am afraid you have completely missed my point. I never said clients must not detect other clients liveness before using it for best path selection and in their local data planes. I said RS does not need to bothered with that information. In fact I explicitely said that modern clients will detect health of the path well beyond local peer's next hop. Cheers, R. On Mar 13, 2017 11:32 AM, "Nick Hilliard" <nick@foobar.org> wrote: Robert Raszuk wrote: > Let's observe that the ultimate objective of this draft (and in fact > much more) can be achieved by assuring that clients receive more then > one path to given bgp destinations at normal operation. This is a fundamental misunderstanding. The aim of this draft is to ensure that traffic isn't blackholed if there is a layer 2 incongruity on the IXP which causes connectivity to be non commutative. Given the following topology, A's connectivity to RS works fine, and B's connectivity to RS works fine, but A cannot communicate with B: > +-----+ +-----+ > | +--> | | > | A | | B | > | | <--+ | > +-----+ +-----+ > | | > | +------+ | > +-+ +--+ > | RS | > | | > +------+ What's needed is some protocol running between A and B to ensure that they can still talk to each other, i.e. BFD. No amount of alternative paths will save you in this situation because the control plane (RS) has connectivity to both data plane routers. Nick _______________________________________________ Idr mailing list Idr@ietf.org https://www.ietf.org/mailman/listinfo/idr
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Rajiv Asati (rajiva)
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Rajiv Asati (rajiva)
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Nick Hilliard
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Nick Hilliard
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt i3D.net - Martijn Schmidt
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Mikael Abrahamsson
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Nick Hilliard
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Jeffrey Haas
- [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt internet-drafts
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Randy Bush
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Nick Hilliard
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Randy Bush
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Randy Bush
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Gert Doering
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Randy Bush
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Nick Hilliard
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Nick Hilliard
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Gert Doering
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Nick Hilliard
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Niels Bakker
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Nick Hilliard
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Rajiv Asati (rajiva)
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Rajiv Asati (rajiva)
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Nick Hilliard
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Nick Hilliard
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Nick Hilliard
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Gert Doering
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Gert Doering
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Gert Doering
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Nick Hilliard
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Nick Hilliard
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Gert Doering
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Robert Raszuk
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Gert Doering
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Rajiv Asati (rajiva)
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt John G. Scudder
- Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt Rajiv Asati (rajiva)