[163520] in North American Network Operators' Group
Re: Single AS multiple Dirverse Providers
daemon@ATHENA.MIT.EDU (Patrick W. Gilmore)
Mon Jun 10 13:51:22 2013
From: "Patrick W. Gilmore" <patrick@ianai.net>
In-Reply-To: <51B60EB5.4090805@whack.org>
Date: Mon, 10 Jun 2013 13:51:00 -0400
To: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On Jun 10, 2013, at 13:36 , Bruce Pinsky <bep@whack.org> wrote:
> =08Patrick W. Gilmore wrote:
> >> however, providers a/b at site1 do not send us the two /24s from
> >> site b..
> >=20
> > This is probably incorrect.
> >=20
> > The providers are almost certainly sending you the prefixes, but =
your router is dropping them due to loop detection. To answer your later =
question, this is the definition of 'standard' as it is written into the =
RFC.
> >=20
> > Use the allow-as-in style command posted later in this thread to fix =
your router.
> Or maintain "standard" behavior by running a GRE tunnel between the =
two
> discontinuous sites and run iBGP over the tunnel.
Standard how? I don't remember any such standard, but always willing to =
be educated.
Also, as someone who helps run 2500 non-connected sites, I can't begin =
to imagine the mess of GRE that would require. (OK, not all are in the =
same ASN, but I like hyperbole. :)
--=20
TTFN,
patrick
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