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Re: [Idr] IDR WG LC on draft-ietf-idr-ix-bgp-route-server (2/2/2015 - 2/16/2015)

David Freedman <david.freedman@uk.clara.net> Thu, 12 February 2015 06:25 UTC

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From: David Freedman <david.freedman@uk.clara.net>
To: Randy Bush <randy@psg.com>
Thread-Topic: [Idr] IDR WG LC on draft-ietf-idr-ix-bgp-route-server (2/2/2015 - 2/16/2015)
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Date: Thu, 12 Feb 2015 06:23:17 +0000
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Subject: Re: [Idr] IDR WG LC on draft-ietf-idr-ix-bgp-route-server (2/2/2015 - 2/16/2015)
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>we considered a more 'liberal' approach similar to one recommended
>privately by job, where the peer discovers who to set up bfd with by
>what next hops they get.  this has problems in that it assumes NH is
>set, prefixes exist (A may announce nothing to B), etc.

Making this a function of BFD (and not BGP) makes sense here IMHO,
if there is no NH set, or no prefixes exist on day one then
I'm not going to need a BFD session in the first place.


>> which provides some assurance that you
>>know your potential bfd peer set.

Is't this the point of the RS, to facilitate in the face of the unknown?
with the above approach, assuming I filter against the RS, if I wanted to,
would I not still reach the same outcome?

Dave.

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