This section addresses common questions involving the management of ATM, ISDN, and dial interfaces.
Depending on the version of IOS you are running, you can gather per VC statistics based on the ifTable from RFC 2233—provided that each VC is on a separate sub-interface.
SNMP ifTable subinterface support for ATM LANE clients became available in IOS 11.2. Support for all other ATM encapsulations became available in 12.0T.
From the CISCO-POP-MGMT-MIB, use the cpmISDNCallsRejected MIB object for ISDN and cpmModemCallsRejected ...