Re: VCn-xV LSPs terminology

[Dieter Beller <D.Beller@alcatel.de>]

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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