The MPLS WG Archive

[Shahram Davari <Shahram_Davari@pmc-sierra.com>]

Hi,

During the previous last call I raised the following issue:

1) Which one of the Backup Path Identification mechanisms are mandatory and which one is optional. I don't think it is reasonable to require people to implement both.

2) I also have a new comment regarding which one of the detour and facility backup are mandatory and which one is optional. The text says:

"While the two methods could in principle be used in a single
   network, it is expected that operators will continue to choose to
   deploy either one or the other.  The goal of this draft is to
   standardize the RSVP signaling such that either a network with LSRs
   that implement both methods or an network composed of some LSRs
   that support one method and others that support both, can properly
   signal among those LSRs to achieve fast restoration through the
   chosen method."

But without having a mandatory mode, LSRs that implement one method can't interwork
with LSRs that implement the other. And I don't think it is reasonable to force
people to implement both.

Yours,
-Shahram