With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
crcSrcERSpanIpDscp
crc Source ER Span Ip Dscp
1.3.6.1.4.1.9.9.103.1.2.5.1.10
The IP DSCP value for this traffic type. This object is only significant when object crcERSpanSessionType is eRSpanSource(1) and object crcSrcERSpanDscpOrPrec is dscp(1). This object may be modified when the row is active.
Back to CISCO-RMON-CONFIG-MIB MIB page.
IPHost Network monitor allows you to monitor crcSrcERSpanIpDscp 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.