With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvsVSLPortRxMyInfoAbsentPkts
cvs VSL Port Rx My Info Absent Packets
1.3.6.1.4.1.9.9.388.1.3.3.1.9
The number of received packets without local switch information for the port.
Back to CISCO-VIRTUAL-SWITCH-MIB MIB page.
IPHost Network monitor allows you to monitor cvsVSLPortRxMyInfoAbsentPkts on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.