With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cbQosIPHCTcpSentByteOverflow
Cisco Class Based Qos IPHC Tcp Sent Byte Overflow
1.3.6.1.4.1.9.9.166.1.23.1.1.23
The upper 32 bits count of outbound TCP bytes.
Back to CISCO-CLASS-BASED-QOS-MIB MIB page.
IPHost Network monitor allows you to monitor cbQosIPHCTcpSentByteOverflow 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.