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Cell Relay Retreat>MPLS-OPS Archive>month:2002-Jul> msg00096



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Re: mpls vpn bgp

  • From: Rajiv Asati <rajiva@cisco.com>
  • Date: Tue, 30 Jul 2002 20:20:26 -0400
  • Cc: <mpls-ops@mplsrc.com>
  • Resent-Date: Tue, 30 Jul 2002 21:12:38 -0400
  • To: "Amos Rosenboim" <slick@inter.net.il>
  • X-Sender: rajiva@dingdong.cisco.com

Amos,

At 06:57 PM 7/27/2002, Amos Rosenboim wrote:
Hi,
I'm trying to  help a friend to establish an mpls vpn
in the following topology:
 
 CMTS( cisco ubr 10000 ) PE1 ----cisco GSR----cisco 7200 PE2
 
Bgp is up between the PE routers, but there is no vrf ping between the vrf interfaces in the PE routers.

You mean, the VRF pings are failing between PE1 and PE2.

The source addresses of the bgp in the cmts is the interface connected  to the gsr,

That doesn't look right to me. The interface connecting to the GSR is the PE-P interface, which is in the global routing table, not in the VRF routing table. So sourcing the PE-P interface in the VRF pings will always result in the ping failures.


and in the 7200 the source of the bgp is just some interface.
When i'm changing the source of the bgp in the cmts to the loopback interface then everrything works fine.

Is the loopback interface in the VRF ? If so, then this is right.

Please let me know if I could be of more help.

Cheers,
Rajiv

any ideas why this happens.
 
10x
 
Amos
 

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