[141884] in North American Network Operators' Group
bgp feed to customer
daemon@ATHENA.MIT.EDU (Richard Zheng)
Mon Jun 13 13:26:45 2011
From: Richard Zheng <rzheng@gmail.com>
Date: Mon, 13 Jun 2011 07:25:12 -1000
To: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hi,
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?
Thanks,
Richard
---------- -------------- ------------
| BGP rtr A | ============ | no-BGP rtr B | ============ | Customer C |
---------- -------------- ------------
