[163511] in North American Network Operators' Group
Re: Single AS multiple Dirverse Providers
daemon@ATHENA.MIT.EDU (Joe Abley)
Mon Jun 10 12:44:27 2013
From: Joe Abley <jabley@hopcount.ca>
In-Reply-To: <50710E9A7E64454C974049FC998EB655E230D9@03-exchange.lti.local>
Date: Mon, 10 Jun 2013 18:43:50 +0200
To: "Dennis Burgess" <dmburgess@linktechs.net>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 2013-06-10, at 18:36, "Dennis Burgess" <dmburgess@linktechs.net> =
wrote:
> I have a network that has three peers, two are at one site and the =
third
> is geographically diverse, and there is NO connection between the two
> separate networks.
>=20
>=20
>=20
> Currently we are announcing several /24s out one network and other =
/24s
> out the second network, they do not overlap. To the internet this =
works
> fine, however, providers a/b at site1 do not send us the two /24s from
> site b.. We have requested them to, but have not seen them come in,
> nor do we have any filters that would prohibit them from coming in.=20
>=20
>=20
>=20
> Is this normal?
Yeah.
> Can we receive those routes even though they are from
> our own AS?
You can stop them from being suppressed inbound by using "neigh x.x.x.x =
allowas-in" on a cisco, or "set neigh x.x.x.x allowas-in" on JunOS.
> What is the "best practice" in this case? =20
I don't know. Above seems reasonable. I've seen people join their sites =
with tunnels plumbed to router loopbacks in different sites and run IGPs =
over them before; this gives them inter-site connectivity which makes =
the question moot. But it involves tunnels.
Joe
