Subject: L2VPN (kompella) issue

From: "Shah, Himanshu" <[email-masked]>
Date: Thu, 15 Feb 2001 11:39:34 -0500

It seems that when processing cross-connects
dynamically, as described by Kompella draft, 
there is a greater need of MPLS OAM (or some
type of NNI) type of functionality.

You need this to prevent data loss due to
asynchronous nature of cross-connect programing
occuring at local and remote PE.

For example, if local PE (as a DCE) programs the
cross-connect and reports DLCI active to CE (as DTE),
CE would start propagating data through that DLCI.
However, remote PE may not have programed the cross-connects
yet.

I do understand that this might not be a problem 
during initial setup (inverse ARP discovering IP addr or
some other client server not being able to discover
each other). However, this might become issue
for restarts (e.g. due to BGP session loss), if not
for IP, may be for other protocols (its layer 2 circuit
after all). It especially does become an issue if CE
devices are frame relay switches.

If other people think this to be an issue, we should address
that in the draft

Any comments??

Himanshu Shah
Tenor networks
Acton, MA

PS. Sorry for distribution to both the lists, but nbvpn
list is very sluggish for some reasons.

Himanshu Shah
Tenor Networks
Acton, MA