[47777] in North American Network Operators' Group
Re: BGP and aggregation
daemon@ATHENA.MIT.EDU (Ralph Doncaster)
Mon May 13 18:31:46 2002
Date: Mon, 13 May 2002 18:31:47 -0400 (EDT)
From: Ralph Doncaster <ralph@istop.com>
To: Stephen Griffin <stephen.griffin@rcn.com>
Cc: "nanog@merit.edu" <nanog@merit.edu>
In-Reply-To: <200205132142.RAA11300@elektra.ultra.net>
Message-ID: <Pine.LNX.4.21.0205131830230.25285-100000@cpu1693.adsl.bellglobal.com>
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Errors-To: owner-nanog-outgoing@merit.edu
> > 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
>
> The loss of igp metric will make it untenable at best. Do it over a
> GRE tunnel, with your regular igp (isis, ospf, eigrp, or shudder rip).
As far as I can tell, GRE doesn't support fragmentation -
i.e. encapsulation of a 1500-byte IP packet that results in a GRE packet
larger than the interface MTU size.
-Ralph
