hwL2IfHybridUnTaggedVlanListHigh 1.3.6.1.4.1.2011.5.25.42.1.1.1.9.1.5

This object indicates the high-bit untagged VLANs carried in packets that can pass through the hybrid interface. There are 2048 high-bit VLANs (2048-4095) and VLAN 4095 is not used.