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Re: A question regarding draft-ietf-ccamp-gmpls-sonet-sdh-08

hi diego,

see in-line

Diego Caviglia wrote:

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Hi All,,
                        could you please clarify a doubt I have about
virtual concatenation?

see the sentence above: "In case of signal concatenation or multiplication,
a list of labels can appear in the Label field of a Generalized Label."

and since per RFC3471, Section 4.1 "An Upstream Label has the same format as
the generalized label, see Section 3.2." i think this should respond to
your second question

cw in vienna,
- dimitri.


Quoted from the draft:
"
...
   In case of virtual concatenation, the explicit ordered list of all
   labels in the concatenation is given. Each label indicates the
   first time-slot occupied by a component of the virtually
   concatenated signal. The order of the labels must reflect the
   order of the payloads to concatenate (not the physical order of
   time-slots). The above representation limits virtual concatenation
   to remain within a single (component) link; it imposes as such a
   restriction compared to the ANSI [T1.105]/ITU-T [G.707]
   recommendations.
..
"

My doubt is about where I have to put the labes.  In the Upstream Label object?
If yes have I to use a single object header with the appropriate lenght or have I to use n objects?

Thanks in advance for your reply.

Best regards.

Diego



------------------------------------------
Diego Caviglia
Marconi - Optical Networks
ASTN/GMPLS - System Design Manager
Via A. Negrone 1/A
16153 Genoa - Italy
Phone: +390106003736







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