Re: SONET/SDH Label (SUKLM) and the possible values of S, U, K, L and M

[Dimitri.Papadimitriou@alcatel.be]

hi,

Pandian, Vijay wrote:

> Hi,
>
> In section 3 of draft-ietf-ccamp-gmpls-sonet-sdh-08.txt, for the possible
> values of S, U, K, L, and M, and in particular for U, it says:
> 	
>    " 2. U=1->3 is the index of a particular STS-1_SPE/VC-3 within an
>      STS-3/AUG-1. U is only significant for SONET STS-N (N>1) and SDH
>      STM-N (N>0). U must be 0 and ignored for STS-1 and STM-0."
>
> How can this be true? 

because this value is significant only when it can be used (and
otherwise set to 0) ie it is the index of an STS-1_SPE/VC-3 in
a STS-3/AUG-1 meaning that the so-called "multiplex" must be at
least an STS-3/STM-1, if it is a STS-1/STM-0 it is of no use, U
is otherwise as table in page 12 indicates set to 0

hope this helps,
- dimitri.

> Should this be:
>
>    " 2. U=1->3 is the index of a particular STS-1_SPE/VC-3 within an
>      STS-3/AUG-1. U is only significant for SONET STS-1 and SDH STM-0.
>      U must be 0 and ignored for STS-N (N>1) and STM-N (N>0)."
>
> Regards,
>
> Vijay

--
Papadimitriou Dimitri
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