With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
crcSpanEgressReplicationMode
crc Span Egress Replication Mode
1.3.6.1.4.1.9.9.103.1.5.1
Describes where SPAN egress packets get replicated, centralized in the device or distributed to where traffic is sourced
Back to CISCO-RMON-CONFIG-MIB MIB page.
IPHost Network monitor allows you to monitor crcSpanEgressReplicationMode on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.