With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cftIfTcpRxDroppedByNoMemory
Cisco Fiber Channel Tunnel If Tcp Rx Dropped By No Memory
1.3.6.1.4.1.9.9.9999.1.1.5.1.18
Number of receiving TCP packets dropped because of lacking of memory.
Back to CISCO-FC-TUNNEL-MIB MIB page.
IPHost Network monitor allows you to monitor cftIfTcpRxDroppedByNoMemory 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.