Subject: Question regarding InterAS and Carriers' Carrier VPNs

From: Jim T <[email-masked]>
Date: Fri, 9 Jan 2004 11:33:11 -0800 (PST)

In section 10(b) of rfc2547bis, it is stated that when the ASBR receives a labeled packet from the adjacent ASBR, it has to ensure that the top label in the labeled packet was one that it distributed to the adjacent ASBR. I am not clear how this is enforced. Would the ASBR have a per-interface label-forwarding entry or would it have a label-forwarding entry per adjacent ASBR? If so, if the ASBR distributes a particular VPN-IPv4 route to many other ASBRs, it would have to create many label-forwarding entries, correct? Is this how vendors do it?
 
The same question applies to section 9 too. I don't know if this is an implementation issue but it would help me if someone can shed some light upon it.
 
Thanks,
Jim

---------------------------------
Do you Yahoo!?
Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes