With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
vpSecActInstTunnelIndex
VPN Policies Sec Act Instance Tunnel Index
1.3.6.1.4.1.2.6.119.4.15.4.4.10.1.3
The IPSec Phase-2 Tunnel Index (ipSecTunnelIndex from the IBM IPSec MIB).
Back to ibm-vpnpolicy MIB page.
IPHost Network monitor allows you to monitor vpSecActInstTunnelIndex 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.