With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
fcIfEISLFramesDiscard
Cisco Fibre Element If EISL Frames Discard
1.3.6.1.4.1.9.9.289.1.2.1.1.29
The number of Enhanced Inter Switch Link (EISL) frames discarded by the FC-port. EISL frames carry an EISL header containing VSAN among other information.
Back to CISCO-FC-FE-MIB MIB page.
IPHost Network monitor allows you to monitor fcIfEISLFramesDiscard on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.