{SUKLM} Changes in new draft

["manoj juneja" <manojkumarjuneja@hotmail.com>]

[ post by non-subscriber ]

Hi All,
        In the newly released draft draft-ietf-ccamp-gmpls-sonet-sdh-04.txt, 
the interpretation of S field in the {SUKLM} structure looks to be different 
than was present in earlier draft draft-ietf-ccamp-gmpls-sonet-sdh-03.txt.

The definition in 04 version is :

1. S=1->N is the index of a particular AUG-1/STS-3 inside an
     STM-N/STS-N multiplex. S is only significant for SDH STM-N (N>0)
     and SONET STS-N (N>1) and must be 0 and ignored for STM-0 and
     STS-1.


The definition in 03 version is :

1. S is only significant for SDH STM-N (N>0) and SONET. It must
     be ignored for STM-0. S is the index of a particular AUG-1/STS-
     1. S=1->N indicates a specific AUG-1/STS-1 inside an STM-N/STS-N
     multiplex. For example, S=1 indicates the first AUG-1/STS-1, and
     S=N indicates the last AUG-1/STS-1 of this multiplex.

With the old version of the document, if I need to represent say Xth (X<=N) 
VC-4 in STM-N multiplex then the label value is {X, 1, 0, 0}. What will be 
this representation as per 04-version ?

Can someone please explain that what was the reason for this change ? What 
will be the advantage of this approach ?

Regards,
manoj.

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