bgp feed to customer

William Herrin bill at herrin.us
Mon Jun 13 14:34:23 CDT 2011


On Mon, Jun 13, 2011 at 1:25 PM, Richard Zheng <rzheng at gmail.com> wrote:
> This is probably a typical setup for border router not speaking BGP, wonder
> how to handle it properly. Border router B is connected with customer router
> C. Router C wants default-only/partial/full routes. Router B can't or is not
> willing to handle it. Router C has a multihop EBGP session with a backbone
> router A. To get router B know the customer routes, router A redistributes
> them from EBGP to OSPF.
>
> The issue is redistribution from EBGP to OSPF works half way. OSPF database
> has the external routes, but forwarding address is set to Router A. So the
> routing loop occurs between A and B.
>
> I wonder if it is a design issue or configuration issue?
>
>  ----------                  --------------                 ------------
> | BGP rtr A |  ============ | no-BGP rtr B |  ============ | Customer C |
>  ----------                  --------------                 ------------


Hi Richard,

Just a SWAG, but run IBGP on router B with just your internal routes
(including the customer route) instead of exporting into OSPF?

Regards,
Bill Herrin



-- 
William D. Herrin ................ herrin at dirtside.com  bill at herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004




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