[mpls-tp] Demultiplexing to BFD sessions

[Mukund Mani <[e-mail]>]

Hi TP-Group
**
*draft-ietf-mpls-tp-lsp-ping-bfd-procedures-00 *states in Section 3

"When using BFD over MPLS-TP LSPs, the BFD discriminator MUST either be
signaled via LSP-Ping or be statically configured."

*draft-ietf-mpls-tp-bfd-cc-cv-00 *states in Section 3.5.6

"MPLS labels at peer MEPs are used to provide context for the received BFD
packets."

As I understand from the statement in the CC/CV draft, since discriminator
values are not required for demultiplexing to the BFD session anymore, we
will not need LSP Ping to bootstrap BFD session for TP LSP.

But *draft-ietf-mpls-tp-lsp-ping-bfd-procedures-00 *specifies that LSP Ping
can also be used to signal BFD discriminator.

So is LSP Ping still really needed in the context of BFD over MPLS-TP?

Also as a part of MPLS-TP OAM could somebody explain why such a deviation is
taken from the BFD-BASE mode of demultiplexing which even BFD-MPLS uses
(discriminator values instead of MPLS labels), but MPLS-TP goes in for
demultiplexing using labels....

Could somebody please clarify this..?


With Regards
Mukund
 <http://tools.ietf.org/html/draft-ietf-mpls-tp-bfd-cc-cv-00>