From: Daniel C. Young (danyoung99@xxxxxxxxxxxx)
Date: Sat Aug 18 2001 - 13:24:28 GMT-3
Himawan,
I know that this posting was up a while ago, but see my comments.
> For PVC, if we don't know the number of vpi/vci, we just use
> pvc discovery with 0 16, right?
Correct. ILMI (much like the LMI features of frame-relay) is what is needed
for ilmi pvc-discovery. ILMI needs to run on vpi/vci 0/16. This is all that
you need to discover the vpi/vci pair that is configured on the atm switch.
> For SVC, just put 0 16 and 0 5 and you're inside the game...
In addition to ILMI, SVCs also need QSAAL, which runs over the vpi/vci of
0/5. QSAAL was based on the ISDN q931 standard, so they are both used for
call setup and call teardown. Just remember that 0/16 and 0/5 is basically
used for overhead. They are essentially PVCs that are used for PVC
management.
> Do we have to use same vpi/vci for both ends?
VPI/VCI pair are like FR DLCIs. They are locally significant. You can even
think of VPIs as bundles or collections of VCIs.
> And (ehm) what is 0 5 used for?
Well, the answer is right up there, but you should have done at least a
little bit of homework before posting the question, man. =) Tsk, tsk, tsk...
Selamat belajar! When are you taking your test?
Regards,
Daniel Young
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