With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
crcSpanCapacityTable
crc Span Capacity Table
1.3.6.1.4.1.9.9.103.1.6.1
This table lists the resource capacity for each SPAN session type that is capable of providing such information.
Back to CISCO-RMON-CONFIG-MIB MIB page.
IPHost Network monitor allows you to monitor crcSpanCapacityTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.