RE: Extensions to LDP Signaling for PBB-VPLS -

["BALUS Florin" <Florin.Balus at alcatel-lucent.com>]

Hi Dave,
As discussed after the session, we are proposing a generic solution that
does not depend on any special, locally configured, BMAC assignment
scheme. 
Florin

> -----Original Message-----
> From: David Allan [mailto:dallan at nortel.com]
> Sent: Thursday, July 30, 2009 12:49 AM
> To: BALUS Florin; l2vpn at ietf.org
> Subject: Extensions to LDP Signaling for PBB-VPLS -
> 
> Hi Florin:
> 
> I understand the problem this proposes to solve, but I believe there
is
> a simpler way. If you assign a B-MAC to a multihomed customer site
then
> you never need to invalidate C-MAC to B-MAC bindings and a MAC
> invalidate message for the B-MAC is sufficient to ensure no black
> holing
> when an AC goes down, normal flooding and learning permitting remote
> PEs
> to learn which PE the customer site is reachable via. This provides
for
> the possibility of localizing the blocked/unblocked decision for the
> ACs
> (which IMO needs to be coordinated between the MH PEs in order to be
> robustly loop free) as knowledge of the multi-homing does not need to
> be
> propagated into the network.
> 
> WDYT?
> Dave