Hello,
In addition to what Trevor Wilson wrote:
Firtsly, lets get the nomenclature correct. A virtually concatenated
signal is denoted as VC-n-Xv (please note the use of hyphens and
upper/lower case letters).
Note that "n" can have the value 4, 3, 2, 12, 11 and for SONET
the nomenclature would be VTn-Xv (n=1.5,6)and STS-n-Xv (n=1,3c).
Looking at draft-imajuku-ccamp-gmpls-vcat-lagr-req-00
I find in the second paragraph of the introduction:
"The LCAS achieves hitless bandwidth modification via
signaling in the H4 byte of the SDH/SONET link"
This restricts this document to VC-n-Xv (n=3,4) and STS-n-Xv.
Changing the text to:
"The LCAS achieves hitless bandwidth modification via
signaling in the VCAT overhead byte of the SDH/SONET link"
will make it more generic (even applicable to OTN).
H4 bite is also mentioned at the top of page 5.
Cheers, Huub (van Helvoort)
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