In the referenced message, Andy Walden said:
True. This also assumes that we aren't talking about vanilla access here
or perhaps you don't have local servers. This could also be fixed with a
floating static I suppose as well. At any rate, it depends on your setup I
suppose. Connecting remote offices != Bad, Vanilla access = probably
tolerable.
andy
BGP will discard any prefix with its own AS in the path, for loop
prevention. Hence, one half of the AS would still be unable to
reach the other half. This is why a partitioned AS is a failure
condition. A tunnel is a means to keep the AS nonpartitioned.
I was thinking of doing iBGP over my transit connections (with a couple
of static routes so the iBGP works) AND over my inter-city circuit. Any
reason why this won't work?
-Ralph
I don't think doing iBGP over your transit connections, i.e., outside of
your AS, is such a solid idea. I'm not a fan of IP tunneling this sort of
thing either.
andy
Date: Sun, 12 May 2002 21:31:54 -0400 (EDT)
From: Ralph Doncaster
I was thinking of doing iBGP over my transit connections
Filters up, everyone! 
(with a couple of static routes so the iBGP works) AND over
my inter-city circuit. Any reason why this won't work?
Static routing through at least two external ASNs?! Uh, no.
Back to tunnels...