With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
fcFxPortCapIntermix
fc Fx Port Cap Intermix
1.3.6.1.2.1.75.1.5.1.1.8
A flag indicating whether or not the FxPort is capable of supporting the intermixing of Class 2 and Class 3 frames during a Class 1 connection. This flag is only valid if the port is capable of supporting Class 1 service.
Back to FIBRE-CHANNEL-FE-MIB MIB page.
IPHost Network monitor allows you to monitor fcFxPortCapIntermix 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.