At 09:13 AM 5/1/01 +0000, Stephen Skinner wrote:
>Carroll,
>
>may i be so bold as to ask another question ????
>
>the VCI/VPI numbers....i was led to beleive that this are carrier supplied
>and have no Overall meaning(just the DLCI type)...but i have seen that
>some do have meaning....i searched CCO but fpound squat...any links or
>info you could provide would be most welcome
>
>Thanks in advance
>
>steve
VCI == Virtual Circuit Identifier
VPI == Virtual Path Identifier
Together they define an "end-to-end" circuit, but you are correct, they
only hold local significance. The actual VCI/VPI may change during it's
transit to the final destination (once it hits a switch, the pair can be
totally changed), just like a DLCI.
They are some reserved VCI/VPIs like
(x can be any integer from 0 to 256?). (not sure on the limits here, VPIs
are not supposed to be as common, the VCI probably have up to 65535 as the
upper bound).
VPI/VCI
x/1
and as the others mentioned
0/5
0/16
They are reserved for signalling or metasignalling. (UNI). I believe
there are even some well known DLCIs as well (reserved). I suppose you
'could' use them, at your own peril.
-Carroll Kong
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=2736&t=2256
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