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Re: VCn-xV LSPs terminology

Hi, Diego

  I understand your question is whether we shoud call LSP on
the basis of signaling session or not.

 If so, IMHO is Yes.
 The VC4-7v with single RSVP session is single LSP.
 On the other hand, VC4-3v + VC4-4v with two RSVP session is two LSPs.
 However, both of them are single LSP in the client layer as Dieter said, .

 That is my understanding.
 But is that right, all ?

Best Regards
Wataru

Hi Diego,

Diego Caviglia wrote:

Hi all,
       I'd like to have a terminology clarification about virtual
concatenated LSP.

When, say a VC4-7v, VCAT circuit is set-up with a single signalling session
RFC3946 (Path, Resv and may be Resv Confirm) is correct to say that the
VCAT group is made by a single LSP or that is made by 7 LSPs?

IMHO in that case there is a single LSP.


in my understanding, you are describing a multi-layer scenario here
because the VCAT client layer sits on top of the VC4 server layer (see
ITU-T Rec. G.806).

If you are in the VCAT client layer, there is IMHO a single LSP that
is decomposed into 7 HO VC4 LSPs in the VC4 server layer in your
example.

Now, if multiple (not necessarily all) VC4 LSPs are routed along the
same path you could set up a server layer call containing multiple
VC4 connections using a single RSVP signaling session (as it was
done in the OIF interop demo this year).

I hope this clarifies the issue.


Cheers,
Dieter

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+---------------+      Dieter Beller
| A L C A T E L |      Alcatel Optics Group
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Wataru Imajuku
Senior Research Engineer
@NTT Network Innovation Labs.
TEL +81-46-859-4315
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