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Tom,
Raman and all,
My
understanding of the original question was (please correct me if I got something
wrong):
Can LSP ping in VCCV be used to verify the PW
connectivity if it uses, say, MPLS-in-IP or MPLS-in-GRE for transport and the
PW label (bound to the appropriate PW Id or Generalized PW Id FEC) for PW
demultiplexing? And is such a verification required if the IP connectivity to
the remote device is OK?
IMHO the answer is:
-
Such
a verification makes sense (the PW demuxing
in the remote box can go wrong even if the IP transport brings the PW packets
to the correct remote box)
-
LSP
Ping in VCCV is the appropriate (and, AFAIK, the only) way to perform
it.
Did I miss something?
Regards,
Sasha
Hi
,
Can I conclude
from the below draft sections that
“LSP Ping should
be used to test MPLS PWs over MPLS PSN and
it does not
applicable to test MPLS PWs over IP PSN(Say GRE
tunnel).”
VCCV should
always be used to test the PW layer regardless of the PW
type or encapsulation, and the appropriate tools for the lower layer to
test those.
So use LSP ping/trace for MPLS LSPs, and ICMP echo for IP/l2tp
tunnels/paths.
--Tom
Draft:
draft-ietf-pwe3-vccv-15 Section 3 : The CV types include LSP Ping [RFC4379] for MPLS PWs, and ICMP Ping [RFC0792] [RFC4443] for both MPLS and L2TPv3 PWs. Section 4: The various VCCV CV types supported are used only when they apply to the context of the PW demultiplexer in use. For example, LSP Ping type should only be used when MPLS is utilized as the PSN.
Thanks,
Raman
R
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