IAVF_VC_OP_ADD_VLAN
rv = iavf_config_vlan_id(sc, vid, IAVF_VC_OP_ADD_VLAN);
iavf_config_vlan_id(sc, vlanidp->vid, IAVF_VC_OP_ADD_VLAN);
case IAVF_VC_OP_ADD_VLAN:
KASSERT(opcode == IAVF_VC_OP_ADD_VLAN || opcode == IAVF_VC_OP_DEL_VLAN);