With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
fcIfRNIDInfoUnitType
Cisco Fibre Element If RNID Info Unit Type
1.3.6.1.4.1.9.9.289.1.1.13.1.7
The type of the peer node that this port is communicating. channel - Host controlUnit - Disk fabric - Another SAN switch unknown - if fcIfRNIDInfoStatus is 'invalid' this would be unknown.
Back to CISCO-FC-FE-MIB MIB page.
IPHost Network monitor allows you to monitor fcIfRNIDInfoUnitType 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.