With IPHost Network Monitor you can run simple snmp requests against a Dell device in your network.
fcNPSInFBSYFrames
Fibre Channel NPS In FBSY Frames
1.3.6.1.4.1.2512.1.1.12.1.8
The number of F_BSY frames received by this N_Port/NL_Port.
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IPHost Network monitor allows you to monitor fcNPSInFBSYFrames on Dell device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Dell routers right now.