hwIPv6MTU 1.3.6.1.4.1.2011.5.6.1.2.1.14

Used to configure the maximum transmission unit of vlanif.If you set it on one vlanif,all the vlanif will be configured. Range: -1,1501-1560 Deafult:-1,this value means the MTU of vlanif is the default value(for example: 1500).