Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acceptown-community-01.txt
Danny McPherson <danny@tcb.net> Wed, 30 April 2008 20:12 UTC
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From: Danny McPherson <danny@tcb.net>
To: "John G. Scudder" <jgs@bgp.nu>
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Subject: Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acceptown-community-01.txt
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On Apr 30, 2008, at 11:45 AM, John G. Scudder wrote: > The nice thing is that the feature is backward compatible and fails > safe -- if the client doesn't know how to handle the community, then > it sees itself in the ORIGINATOR_ID and drops the route. No route, no > routing information loop. Granted the behavior of dropping the route > is undesired, but not horrible. Even your draft disagrees with this, else it wouldn't mention the disabling RFC 1966 behavior (as opposed to the discard based on ORIGINATOR_ID on the client that RFC 2796 introduced - for no valid _protocol reason, mind you, which annoys me considerably). Along this vein, I would be quite interested in someone providing an explanation of why this behavior was changed from 1966 to 2796.... > Interesting -- one would have expected the vendor 'm' router to drop > the routes even if it didn't understand ORIGINATOR_ID, due to the > NEXT_HOP check. I guess if the NEXT_HOP were getting rewritten... > > But in any event this particular case is academic because of the "fail > safe" behavior discussed above -- any client that interoperates with a > 2796 RR will fail safe. (Any client that doesn't interoperate with a > 2796 RR is arguably pretty broken at this point.) Right, but see my point above... This assumes all clients employ the discard behavior of 2796. > One of my co-authors may want to address this point. From my PoV, > suffice it to say there's real demand for the feature. I'm sure there is demand to make 2547 configuration simpler, but that doesn't mean it's something we should change fundamental BGP behavior to facilitate. I would be interested in here from your co-authors.. > What is the redundant network state you're referring to? The "address > family overlays" I snipped out of the quote? No, I've come to accept the AF overlays.. What troubles me is the fact that we're using BGP to enable a RR to modify an update learned from a client, and to reflect that update back to that client - just does seem good routing protocol hygiene to me, to save configuration overhead on the client, when it'll surely be further required on the RRs. -danny _______________________________________________ Idr mailing list Idr@ietf.org https://www.ietf.org/mailman/listinfo/idr
- [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acceptow… Danny McPherson
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Ilya Varlashkin
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… John G. Scudder
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Ilya Varlashkin
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Danny McPherson
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… John G. Scudder
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Danny McPherson
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Enke Chen
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Danny McPherson
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… John G. Scudder
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Enke Chen
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Danny McPherson
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Enke Chen
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Danny McPherson
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Danny McPherson
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… John G. Scudder
- Re: [Idr] Fwd:I-D ACTION:draft-pmohapat-idr-accep… Robert Raszuk
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Danny McPherson
- Re: [Idr] Fwd:I-D ACTION:draft-pmohapat-idr-accep… Danny McPherson
- Re: [Idr] Fwd:I-D ACTION:draft-pmohapat-idr-accep… John G. Scudder
- Re: [Idr] Fwd:I-D ACTION:draft-pmohapat-idr-accep… Brian Dickson
- Re: [Idr] Fwd:I-D ACTION:draft-pmohapat-idr-accep… Robert Raszuk
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… UTTARO, JAMES, ATTLABS
- Re: [Idr] Fwd:I-D ACTION:draft-pmohapat-idr-accep… Danny McPherson
- [Idr] Route reflectors [was: Re: Fwd:I-D ACTION:d… John G. Scudder
- Re: [Idr] Route reflectors [was: Re: Fwd:I-D ACTI… Brian Dickson
- Re: [Idr] Fwd: I-DACTION:draft-pmohapat-idr-accep… Ilya Varlashkin
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Jeffrey Haas
- Re: [Idr] Fwd: I-DACTION:draft-pmohapat-idr-accep… UTTARO, JAMES, ATTLABS
- Re: [Idr] Fwd: I-DACTION:draft-pmohapat-idr-accep… Danny McPherson
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… John G. Scudder
- Re: [Idr] Fwd: I-DACTION:draft-pmohapat-idr-accep… Jim Guichard (jguichar)
- Re: [Idr] Fwd: I-DACTION:draft-pmohapat-idr-accep… Ilya Varlashkin
- Re: [Idr] Fwd: I-DACTION:draft-pmohapat-idr-accep… John G. Scudder
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Jeffrey Haas
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Jim Guichard (jguichar)
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… UTTARO, JAMES, ATTLABS
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Jeffrey Haas
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… John G. Scudder
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Jeffrey Haas
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… John G. Scudder
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Jeffrey Haas
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… John G. Scudder
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… Jeffrey Haas
- Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acce… David Ward
- Re: [Idr] Fwd: I-DACTION:draft-pmohapat-idr-accep… Pradosh Mohapatra (pmohapat)
- [Idr] draft-pmohapat-softwire-lb-00.txt Pradosh Mohapatra (pmohapat)