With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
ibmMvsTcpConnUsrSndNxt
ibm Mvs Tcp Connection Usr Snd Nxt
Sequence number of next byte for user
Back to ibm_mainframe-Mvstcpip MIB page.
IPHost Network monitor allows you to monitor ibmMvsTcpConnUsrSndNxt on IBM device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring IBM switches right now.