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Cell Relay Retreat>MPLS WG Archive>month:2002-Apr> msg00192



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2547 questions . .

  • From: "Liu, Chia J (Charlie), ALCNS" <cliu@att.com>
  • Date: Tue, 23 Apr 2002 10:02:47 -0400
  • Thread-Index: AcHqyWFIqP4HxP74Sjq9DATUA3+52wAAqx7Q
  • Thread-Topic: 2547 questions . .
  • X-MIME-Autoconverted: from quoted-printable to 8bit by cell.onecall.net id g3NE4kk30276


> (1) Does the BGP process on a PE maintain separate RIBs for each VRF 
> configured? I guess BGP might need to do this even if it is not the PE-CE 
> routing protocol
	[Liu, Chia J (Charlie), ALCNS]  My understanding is, in addition to its own IP RIB, each VRF has its own CEF table, in Cisco implementation, to keep routing separate.   However, I am not sure whether there is a separate BGP table in VRF.

> (2) Do any of the other PE-CE routing protocol (e.g., RIP, OSPF) processes 
> maintain separate routing tables on the PE?
	[Liu, Chia J (Charlie), ALCNS]  In the case of OSPF, it requires separate OSPF process ID, different ID from that used for SP's IGP,  and VRF name, therefore, separate routing table. 

C.J. (Charlie) Liu
AT&T IP Network Architecture & Routing Planning