With IPHost Network Monitor you can run simple snmp requests against a Huawei device in your network.
hwL2VlanMappingOutsideVlanListHigh
hw L2 Vlan Mapping Outside Vlan List High
1.3.6.1.4.1.2011.5.25.42.3.1.2.2.1.4
The possible value of the outside vlan list
Back to HUAWEI-L2VLAN-MIB MIB page.
IPHost Network monitor allows you to monitor hwL2VlanMappingOutsideVlanListHigh on Huawei device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Huawei switches right now.