With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
portCpbSpan
port Cpb Span
1.3.6.1.4.1.9.5.1.19.1.1.16
source(0) denotes the capability of being SPAN source destination(1) denotes the capability of being SPAN destination, reflector(2) denotes the capability of being SPAN reflector.
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor portCpbSpan 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.