With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
caclIntervalInLastUnknVpi
Cisco ATM cell layer Interval In Last Unkn Virtual Path Identifier
1.3.6.1.4.1.9.9.133.1.2.2.1.8
The last unknown Vpi value during 15 minute interval. This object is valid only if the value of 'caclIntervalInVpiVciErrCells' for the same interval is non-zero.
Back to CISCO-ATM-CELL-LAYER-MIB MIB page.
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