Re: MPLS Super Backbone + Default route

Hi, Thanks for the replies. Redistribution is working fine (its
actually BGP to OSPF).

I have a pool of 4 routers on one side and a pool of 4 routers on the
other side. Super backbone connects them.

All routers on one side can see the OSPF default route (originates
from PE, learnt via BGP). The routers on the other side cant see the
default. However they can see other external OSPF routes. So the
backbone is working.

Ive connected another test router in another area and the default does
show up (as an IA just like it should through super backbone).

So I've pretty much proven that:

1. super backbone is working.
2. default routes are not carried over super backbone.

So I dont think its so much as a problem, but more likely thats how
super backbone works. What I want to know: is there a reason for it
and can it be enabled?

Thanks,

Gordon
On Fri, Aug 20, 2010 at 7:42 PM, Mirco Orlandi <mirco.orlandi_at_gmail.com> wrote:
> Hi Gordon,
> maybe the issue is on redistribution point at pe:
> - in order to redistribute external ospf routers in bgp, you have to be
> explicit;
> - default-information originate is required inside address-family.
>
> pe1#
> router bgp 1
> address-family ipv4 vrf vpnA
> redistribute ospf 1 match external
> default-information originate
>
>
> pe2#sh ip route vrf vpnA | i 0.0.0.0
> B* 0.0.0.0/0 [200/1] via ..........
>
> HTH,
> -mirco.
>
> On Fri, Aug 20, 2010 at 5:56 AM, Gordon <greyburn_at_gmail.com> wrote:
>>
>> Hi Guys,
>>
>> If your running super backbone to link two different OSPF routing
>> instances (same AreaID & Process) it seems as through it will not
>> carry default routes.
>>
>> I have tested this and other external routes (learnt via BGP) work
>> fine. However the default (also learnt via BGP) is not appearing on
>> the other side of the MPLS cloud.
>>
>> All routers directly connected learn the default through OSPF, just
>> the routers on the other side of the MPLS cloud don't. Im guessing
>> this is some sort of restriction in running super backbone, however
>> there is a real lack of documentation. Any one know the answer to
>> this?
>>
>> Thanks for your help!
>>
>> Gordon
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Fri Aug 20 2010 - 19:48:40 ART