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Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt

"Jakob Heitz (jheitz)" <jheitz@cisco.com> Thu, 06 July 2017 20:36 UTC

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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: idr wg <idr@ietf.org>
Thread-Topic: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt
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Date: Thu, 06 Jul 2017 20:36:50 +0000
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Subject: Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-03.txt
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The draft proposes to filter paths from best-path selection
based upon nexthop reachability.

Why stop at reachability?

A client may not wish to accept routes from another client, because
they don't have a contract or whatever reason.
Can we include the ASN of the nexthop with each nexthop?

Other possible reasons for not wanting a route:
. The AS-path contains an undesirable ASN.
. The origin AS does not have the right to advertise the prefix.
. I prefer a customer route over a peer route.
. The route is a leak.
. Etc, Etc.

Can you put the whole attribute set into the ReachAsk/ReachTell
rather than just the nexthop?

Heck, why don't you just send the complete route --> Add-path.

Thanks,
Jakob.

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