Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-route-reflection-14
Nick Hilliard <nick@foobar.org> Mon, 09 October 2017 21:16 UTC
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Date: Mon, 09 Oct 2017 22:16:28 +0100
From: Nick Hilliard <nick@foobar.org>
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To: Robert Raszuk <robert@raszuk.net>
CC: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, idr wg <idr@ietf.org>, "ytti@ntt.net" <ytti@ntt.net>
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Subject: Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-route-reflection-14
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Robert Raszuk wrote: > So when you run (regular or ORR) best path on 1.1.1.1/24 > <http://1.1.1.1/24> you should have all three metrics 90, 100, 110 there > to pick the best path. If next hop is not in IGP with or without > recursion such path is invalid so we should not worry about it here. correct me if I'm wrong, but I don't think you're understanding what Jakob is saying. When you have multiple orr clients (BGP1 and BGP2 in Jakob's example), their IGP view of the next-next-hops might be different from each other. This might happen if the NH address was anycasted in the IGP, for example, causing the NNH to be resolved different on different bgp clients. In this situation, the behaviour of the ORR client is not defined clearly in the spec. Because of the ambiguity, some implementations appear to have steered clear of handling recursion because it can cause non deterministic resolution problems. Nick
- [Idr] WGLC for draft-ietf-idr-bgp-optimal-route-r… John Scudder
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Robert Raszuk
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… bruno.decraene
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Job Snijders
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Erik.Aman
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Robert Raszuk
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Job Snijders
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Robert Raszuk
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Job Snijders
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Adam Chappell
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Robert Raszuk
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Jakob Heitz (jheitz)
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Robert Raszuk
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Jakob Heitz (jheitz)
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Nick Hilliard
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Robert Raszuk
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Robert Raszuk
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Jakob Heitz (jheitz)
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… John G. Scudder
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… John G. Scudder
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Nick Hilliard
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Rajiv Asati (rajiva)
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Serpil Bayraktar (serpil)
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Manish Bhardwaj (manbhard)
- [Idr] IPR in draft-ietf-idr-bgp-optimal-route-ref… John G. Scudder
- Re: [Idr] IPR in draft-ietf-idr-bgp-optimal-route… Kevin F Wang
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Keyur Patel
- Re: [Idr] IPR in draft-ietf-idr-bgp-optimal-route… Robert Raszuk
- Re: [Idr] IPR in draft-ietf-idr-bgp-optimal-route… Serpil Bayraktar (serpil)
- Re: [Idr] IPR in draft-ietf-idr-bgp-optimal-route… John Scudder
- Re: [Idr] IPR in draft-ietf-idr-bgp-optimal-route… Robert Raszuk
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Jeff Tantsura
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Acee Lindem (acee)
- Re: [Idr] IPR in draft-ietf-idr-bgp-optimal-route… Randy Bush
- Re: [Idr] IPR in draft-ietf-idr-bgp-optimal-route… Christian Cassar
- Re: [Idr] IPR in draft-ietf-idr-bgp-optimal-route… Randy Bush
- Re: [Idr] IPR in draft-ietf-idr-bgp-optimal-route… Robert Raszuk
- Re: [Idr] IPR in draft-ietf-idr-bgp-optimal-route… Randy Bush
- Re: [Idr] IPR in draft-ietf-idr-bgp-optimal-route… Randy Bush
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… John G. Scudder
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Robert Raszuk
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Job Snijders
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… John G. Scudder
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Randy Bush
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… Robert Raszuk
- Re: [Idr] WGLC for draft-ietf-idr-bgp-optimal-rou… John G. Scudder