mscVrIpTunnelMsepPathMtu 1.3.6.1.4.1.562.36.2.1.100.6.18.11.12.1.1

This attribute specifies the Path Maximum Transmission Unit (MTU) of the IP Tunnel. If this value is set to a larger Path MTU than the forwarding path of the IP datagram can support, IP fragmentation may occur.