Re: [Idr] Debugging accepted routes from BGP speakers

Robert Raszuk <robert@raszuk.net> Mon, 18 November 2019 09:28 UTC

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From: Robert Raszuk <robert@raszuk.net>
Date: Mon, 18 Nov 2019 10:28:25 +0100
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To: Jared Mauch <jared@puck.nether.net>
Cc: IDR <idr@ietf.org>
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Subject: Re: [Idr] Debugging accepted routes from BGP speakers
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Hi Jared,

As you know what you are asking for has been covered by previous work and
even IDR WG document:

https://tools.ietf.org/html/draft-ietf-idr-operational-message-00

So as you are defining new BGP message anyway I take there are two options:

*A*  You think  that what we specified in operational message is too much

*B* You think that we will never need more information to be exchanged in
an informational manner between eBGP peers

If *A* would you think that clearly making all of those "additional
information" as optional would fix the problem and we could proceed with
the IDR WG draft in terms of asking for implementation ?

As to your document - few questions/observations:

* new message likely will require new capability.

* "Unknown IANA Considerations" is a new one :)

* How much does it help to know that peer's ASBR accepted your prefix but
it got filtered on egress of peering AS ?

* What is the definition of rejected ? Dropped by policy ? Not eligible for
best path ? Not inserted into RIB as better AD is there ? Marked badly by
origin validation ?

Thx,
Robert.





On Mon, Nov 18, 2019 at 9:54 AM Jared Mauch <jared@puck.nether.net>; wrote:

> Greetings,
>
> As a network operator we often don’t know if our ISPs are accepting the
> routes we send to them.  This makes it difficult at times for operators to
> debug things.  This is a first stab at a draft to try and propose a method
> to have the remote device echo back some route counts (and possibly NLRI)
> that were both accepted and rejected by the remote speaker.
>
> It’s got a few things that I know need to be fixed at minimum, but I
> wanted to share this more broadly now.
>
> I’m interested in feedback and ready to accept your arrows.
>
> - Jared
>
> > URL:
> https://www.ietf.org/internet-drafts/draft-mauch-bgp-accepted-00.txt
> > Status:
> https://datatracker.ietf.org/doc/draft-mauch-bgp-accepted/
> > Htmlized:       https://tools.ietf.org/html/draft-mauch-bgp-accepted-00
> > Htmlized:
> https://datatracker.ietf.org/doc/html/draft-mauch-bgp-accepted
> >
> > Abstract:
> >   This document defines a method to receive accepted and rejected NLRI
> >   over a BGP peering session.
>
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