From: Bob Sinclair (bsin@erols.com)
Date: Fri Nov 01 2002 - 15:46:00 GMT-3
The behavior you see in normal. Your left router knows that your right router has a better route to the external network, so it is not sending its low-preference route. I think you will find that if you shut your external connection on the right (high local-pref) router, then the path through the left router will show up.
It is very good you noticed this: you would not want to spend 30 minutes "trouble shooting" this in the lab.
-Bob
----- Original Message -----
From: <Svuillaume8@aol.com>
To: <ccielab@groupstudy.com>
Sent: Wednesday, October 02, 2002 12:22 PM
Subject: BGP local pref help
> Hi,
>
> If i've two routers with an IBGP session.
> Each router has an Ebgp session to the same AS which announce a network 10.0.0.0.
>
> -----
> |AS 1 |
> _____
> | |
> ________|________|_____
> |AS 2..............AS2 |
> |______________________|
>
> When i let the default parameter my two router have two
> bgp route in thier bgp table.
> In the right router, one to the left router and an other to AS1, however the best route is EBGP
>
> *>10.0.0.0 to AS1
> * 10.0.0.0 to AS2 (left router)
>
> the bgp table is symetric in the left router.
>
> Problem is when i change default local pref in the right
> router, then my right router hasn't two route but only
> one, to AS1, but i have two routes in the left router
> one to AS1 and an other to AS2 (ibgp)????
>
> Is it normal or not?????
>
> Is the same symptom with MED????
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