Use distribute lists on each router to restrict the networks they advertise.
Jeff Doyles book and CCO have some good examples to help you understand.
- Original Message -
From: A Mateen <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Thursday, February 22, 2001 12:01 AM
Subject: Routing loops with ibgp and ospf running Backbones
> Hi !
>
> I have the following network setup running ospf, ibgp within the Domain
and ebgp beween AS.
>
> GW: Gateway router BB: Backbone Router
>
>
>
>
>
>
> Note: BB and GW router is connected directly (cross-connect) and the Area0
is extended from BB to GW router.
>
> Pre-requisite: LAN on Area 11 shud able to access both the routers for
redundancy.
>
> Implementation : Implemented HSRP between BB and GW and extended the Area
0 using cross ethernet back to back cable between BB and GW.
>
> Route-reflectors are confgured on IBGP routers and EBGP on GW routers.
Both the GW routers are connected to the same ISP.
>
> Preoblem : sometimes I am getting routing loop between BB and GW routers
when trying from Area 11 LAN( default Gateway for all the machines is GW).
>
> Action taken: Checked the ip route and gound that the defualt gateway on
GW is pointing to Internet interface and for BB it is pointing to GW. The
looping occured between the back to back connected interface.
>
> Can any body suggests the way to troubleshoot the problem
>
>
>
>
>
> _
> Chat with your friends as soon as they come online. Get Rediff Bol at
> http://bol.rediff.com
>
>
>
> _
> FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
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>
_
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