Subject: Re: VPLS MAC Withdrawal Optimization draft

From: "AISSAOUI Mustapha" <[email-masked]>
Date: Thu, 27 Mar 2008 08:43:47 -0500

I support making this draft a WG document.

Mustapha.
Sent from my Blackberry!

----- Original Message -----
From: [email-masked] <[email-masked]>
To: [email-masked] <[email-masked]>
Sent: Thu Mar 27 07:53:07 2008
Subject: VPLS MAC Withdrawal Optimization draft

In the last l2vpn WG session in Philadelphia, we presented an update of http://tools.ietf.org/html/draft-pdutta-l2vpn-vpls-ldp-mac-opt-03

This draft describes an optional VPLS MAC flush extension by adding a PE-ID TLV. This TLV defines which MAC addresses need to be flushed: All MACs that have been learned from the specified PE need to be flushed.

This mechanism is independent of specific hardware capabilities (e.g. hardware assisted learning) or specific L2 protocols used by CEs (which could be different at ingress and egress points).  It can be used with existing H-VPLS implementations/deployments and is orthogonal to various MAC scaling mechanisms.  

The benefits are that such a mechanism minimizes the overhead of topology changes (e.g. in terms of flooding vs unicasting, FIB maintenance).

We would like to request feedback from the WG about the acceptance of this draft as a WG document.

Pranjal & Marc