With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
ipv6AddrPrefixAdvValidLifetime
ipv6 Address Prefix Adv Valid Lifetime
1.3.6.1.2.1.55.1.7.1.6
It is the length of time in seconds that this prefix will remain valid, i.e. time until invalidation. A value of 4,294,967,295 represents infinity. The address generated from an invalidated prefix should not appear as the destination or source address of a packet.
Back to ibm-ipv6 MIB page.
IPHost Network monitor allows you to monitor ipv6AddrPrefixAdvValidLifetime on IBM device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring IBM servers right now.