Dear Danny and Stewart:

The MFA Forum Technical Committee is progressing a document on ATM to
MPLS SPVC interworking. This document employs the PWE3 / L2VPN single
sided LDP signaling procedures as defined in
draft-ietf-l2vpn-signaling-03.txt. In certain situations, the
configuration information indicating the PW Type necessarily resides at
the passive end of the signaling exchange. It would greatly simplify
our work if a mechanism were defined to allow the passive end to
determine the PW Type.

One possible mechanism the Technical Committee has discussed would be to
provide a "wildcard" PW Type which would match any PW Type except
itself. In this way the initiating end could signal with the wildcard.
The passive end would respond with its configured PW type which would
then be used for both directions of the pseudowire.

Thank you for your consideration of this matter.

Cordially,

Rao Cherukuri
Chairman, MFA Forum Technical Committee