With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
fcmPortLcClass2TxFbsyFrames
fcm Port Lc Class2 Tx Fbsy Frames
1.3.6.1.2.1.10.56.1.5.1.12
The number of times that F_BSY was generated by this port as a result of a Class 2 frame that could not be delivered because either the Fabric or the destination port was temporarily busy. Note that this counter will never increment for an N_Port.
Back to FC-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor fcmPortLcClass2TxFbsyFrames on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.