With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
ipv6IfEffectiveMtu
ipv6 If Effective Mtu
1.3.6.1.2.1.55.1.5.1.4
The size of the largest IPv6 packet which can be sent/received on the interface, specified in octets.
Back to ibm-ipv6 MIB page.
IPHost Network monitor allows you to monitor ipv6IfEffectiveMtu on IBM device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring IBM Blade servers right now.
