I have no experience with BGP confederations, so I could easily be
wrong, however I was under the impression that the idea that BGP
confederations was to reduce the number of iBGP sessions (ie avoid the
full mesh iBGP problem), not so much address aggregation itself.

If this is the case, I think there is a need for BGP, or at least the
pseudo EBGP connections between the pseudo ASs in your confederation, to
carry site-local addressing.

Mark.

On Mon, 2002-11-11 at 13:41, Michel Py wrote:
> > Mark Smith wrote:
> > Could it be argued that if there was a need for confederations
> > in BGP to handle iBGP scaling, then there would a reason for
> > site-locals to be carried by BGP, presuming a single instance
> > of site-local addressing across the organisation ?
> 
> I don't think so. Although it is true that large organizations will be
> concerned by the scalability of their IGP and more specifically by
> convergence speed, the path to this is internal aggregation. Site-locals
> can be aggregated internally like any other address.
> 
> Michel.


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