From: Vishal Patel (vpatel@accessproviders.com.au)
Date: Thu May 25 2006 - 20:57:58 ART
Hi ,
Got it fixed.
The problem was , I was accepting only default route in IGP.
The BGP's neigbour was also not accepted in the filter.
I added the IBGP neigbour in the filter and the things are looking fine
now.
But I don't know the reason , why the routes where flip flopping.
If the router was not having the route for the BGP neighbour , then the BGP
session shouldn't have established at all.
Any ideas ?
Cheers
Vishal
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Nick
Griffin
Sent: Thursday, 25 May 2006 11:15 PM
To: Vishal Patel
Cc: ccielab@groupstudy.com
Subject: Re: Routing issue
I would venture to say that if you did a "show ip bgp x.x.x.x" before the
routes flip to IGP, that the next hop would be marked as inaccessible. Have
or can you verify this? It's possible you have a next hop recursion problem
causing the routes to be installed and removed by the scanner process when
the next hop is marked inaccessible.
Vishal Patel wrote:
> Hi all,
>
> Iam facing a weird problem.
>
> I have a router running ospf and ibgp.
>
> And i have a distribute-list which allows only a default route from
> the neigbour in ospf domain.
>
> And Iam accepting all the internal routes via IBGP.
>
> My routing table should show the internal routes via IBGP with the
> metric of 200.
>
> But the problem happening is the routing updates are continously
> changing between ospf and bgp.
>
> for a movement I get only default route via ospf and next movement I
> get all the internal routes via IBGP.
>
> As soon as remove distribute-list from ospf and accept the whole
> network via ospf , the things are stable.
>
> Well i also have more ospf neigbour , to a different router but it
> has higher cost and it never appears in the routing table.
>
> Any ideas ?
>
> Cheers
>
> Vishal
>
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