With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
tn3270eTcpConnBytesIn
tn3270e Tcp Connection Bytes In
1.3.6.1.2.1.34.8.1.9.1.8
The number of bytes received by the server from TCP for this connection. A Management Station can detect discontinuities in this counter by monitoring the tn3270eTcpConnActivationTime object.
Back to TN3270E-MIB MIB page.
IPHost Network monitor allows you to monitor tn3270eTcpConnBytesIn on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.