Nick <nick@arc.net.my> writes:
>+------------------+
>| Upstream |
>| Provider |
>+------------------+
> / \
> / \
> BR1 BR2
> \ /
> \ /
> \ /
> AR1
>
> BR1, BR2 and AR1 are internally running OSPF. BR1 and BR2 are running eBGP
> with the same upstream provider router. Assuming equal costs path for the
> AR1-BR1-UPSTREAM and AR1-BR2-UPSTREAM paths, will the two paths load balance
> or will only one path be preferred over the other? e.g. the path to the
> router with the highest router ID is preferred and the second path only used
> when the first path fails.
Nick,
Is it the case that AR1 is running BGP? Or are you doing some form
of redistribution into OSPF?
If you are depending on iBGP to communicate the paths from the
upstream, then you need to enable BGP multi-path (2).
From the form of your question, I am assuming that you are
redistributing into OSPF (which is not a great idea, although it may
be necessary). In that case, we need to know if they are E1 or E2
type routes. In any case, assuming that the appropriate costs are
equal, AR1 will load-balance across paths.
-jon
-- ------------------ Jon Allen Boone tex@delamancha.org CCIE #8338
This archive was generated by hypermail 2b29 : Sun Aug 04 2002 - 04:13:25 EDT