[130249] in North American Network Operators' Group
Re: BGP next-hop
daemon@ATHENA.MIT.EDU (Leo Bicknell)
Thu Sep 30 10:01:36 2010
Date: Thu, 30 Sep 2010 07:01:19 -0700
From: Leo Bicknell <bicknell@ufp.org>
To: nanog@nanog.org
Mail-Followup-To: nanog@nanog.org
In-Reply-To: <AANLkTikhi_sq-EMu6Vbdy7Q8kkC9YmQcK887fy=gQS3a@mail.gmail.com>
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In a message written on Thu, Sep 30, 2010 at 10:49:17AM +0100, Heath Jones =
wrote:
> Is there an easy way to see which iBGP routes are not being selected
> due to next-hop not being in IGP?
I have suggested more than a few times to vendors that the command:
show bgp ipv4 unicast 100.10.0.0/16 why-chosen
Would be insanely useful. Yes, you can recreate the 7+ BGP decision
steps in your mind by running a pile of show commands, but when
you're trying to figure out several odd routes at the same time
this is very hard to keep in your head and very labor intensive.
The box knows why it chose the route, and should be able to show
that to you.
Of course most boxes can't show you outgoing BGP communities either.
*sigh* Is it really too hard to ask to get a show bgp neighbor ...
advertised that shows ALL of the attributes?
--=20
Leo Bicknell - bicknell@ufp.org - CCIE 3440
PGP keys at http://www.ufp.org/~bicknell/
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