From: CCIE KH49279 (ccie_lab@inetiq.com)
Date: Thu May 25 2006 - 15:18:51 ART
To add to what Nick is saying...
Since you are seeing this as a constant cycling, you can debug ip routing
and debug bgp and ospf to do comparison. You want to be looking at ip
routing to see the reason for withdrawl.
Best of luck, and let us know what you find.
Wayne
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Nick
Griffin
Sent: Thursday, May 25, 2006 9:15 AM
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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