Subject: [mpls] LSP ping as bootstrap for G-ACh encapsulated BFD

From: Muly Ilan <[email-masked]>
Date: Sun, 17 Jun 2012 16:14:40 +0000

Hi,

We plan to implement the CC-CV-RDI functionality per RFC6428.

Is it mandatory to support LSP ping as a bootstrap for the BFD i.e. using LSP ping with TLV type 15 in the echo request/reply to exchange discriminator values?

RFC6428 is quite vague on this issue. It only states "Overall operation is as specified in RFC 5880 [4] and augmented for MPLS in RFC 5884 [8].".

IMHO, the initial value of the remote discriminator can be zero and replaced with the correct value when the 1st control packet is received from the peer.
This behavior complies with another statement of the RFC "The transmitted Your Discriminator value MUST reflect back the received value of the My Discriminator field or be set to zero if that value is not known".

Thanks,

Muly