From: Lee Carter (l2carter@yahoo.com)
Date: Mon Jun 27 2005 - 17:11:55 GMT-3
All,
Can someone please explain the purpose of classical IP
in at ATM SVC environment. What I get from reading the
DOC's is that Classical IP is a way to make forming
dynamic SVC's with "other" routers or ATM devices
easier. All you need is to configure the ARP Server
and your own ESI adddress and utilize iverse-arp to
dynamically give you the remote ATM's addressing
information so that you may dynamically bring up an
SVC to this device when needing to communicate with
it.
I believe one of the requirements is PVC 0/5 for
qssal so that your router may talk with the ATM switch
so that it can receive the NSAP addresses.
What I don't get is that if you wanted to disable
classical IP... would you have to statically configure
your SVC devices? This I would assume you knew what
they were?
I am thinking it is much like iverse-arp on
frame-relay in that if you disable it you must create
a mapping from the protocol to the DLCI (or protocol
to ESI on ATM) in order for things to continue to
work. Also, that inverse-arp or classical ip are
disabled on point-to-point interfaces.
Does anyone have a good configuration example of an
SVC with classical IP disabled? Or maybe be able to
explain it better. Also, I remember a command you can
enter to get the ATMs address if not given, once
qssal is enabled. Anyone have that handy?
Thanks,
Lee
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