BGP and aggregation
Austin Schutz
tex at off.org
Mon May 13 19:27:09 UTC 2002
On Mon, May 13, 2002 at 06:57:19AM -0400, PS wrote:
>
>
>
> On Mon, 13 May 2002, E.B. Dreger wrote:
>
> > As long as this is getting messy... I'm tempted to suggest
> > confederations. Or spending a few extra bucks on a second ASN,
> > although that doesn't scale.
>
> Multiple ASNs wouldn't solve anything in this case. What was wanted was
> under normal circumstances both A and B only announce a /20, and when the
> link between A and B breaks announce more specifics. Multiple ASN =
> inconsistent AS.. no no.
>
Not necessarily. If 'A' originates the aggregate route it can still be
transited via 'B', though with an additional AS hop. Not a perfect solution,
but then neither is running a gre tunnel.
Austin
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