Subject: Distributed VPLS

From: [email-masked]
Date: Thu, 3 Mar 2005 11:25:00 +0100 (CET)

Hi,

draft-ietf-l2vpn-signaling section 3.5.2 states that to

"Every N-PE must be provisioned with the set of VPLS instances it
   supports, a VPN-id for each one, and a list of local U-PEs for each
   such VPLS.  As part of the discovery procedure, the N-PE advertises
   the number of U-PEs for each VPLS.

 Auto-discovery (e.g., BGP-based) can be used to discover all the
 other N-PEs in the VPLS, and for each, the number of U-PEs local to
 that N-PE"

I understand using BGP the NLRI will contain the VPN-Id.
But I don't get how the number of U-PE is advertises. i.e In which BGP
attribute?

Any idea?

Thanks
Fab