From: Tarun (tarun.ccie@gmail.com)
Date: Tue Apr 15 2008 - 05:11:05 ART
So just to reiterate what's given on that link & make things clarer.
In case of a Confederation Sub-AS
1) For next-hop processing it behaves as a IBGP neighbor.
2) For the routing loop rule which says that an IBGP neighbor would not pass
an update from an IBGP neighbor to anotther IBGP neighbor, a confderation
peer would behave as an EBGP neighbor i.e a update learned by a different
confederation sub-as peer would be be passed on to another confederation
sub-as peer.
That is the reason they say that confederation peering has mixed
characterstics of IBGP & EBGP peerings.
On 4/15/08, dara tomar <wish2ie@gmail.com> wrote:
>
> *Hoping this should be of some help,
>
>
> http://www.cisco.com/warp/public/459/bgpfaq_5816.shtml#twelve
>
> Regards,
> Dara*
>
>
> On Tue, Apr 15, 2008 at 10:15 AM, atif raees <atifraees@hotmail.com>
> wrote:
>
> > Dear all
> >
> > can some body suggest if i am using BGP confederation, how would next
> hop
> > processing works between sub AS.
> > i have learned that sub AS to sub AS peering is a EBGP peering then when
> a
> > route is advertise why the next hop for the route doesn't change.
> >
> > Regards
> > Atif Raees
> >
> >
> >
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