With IPHost Network Monitor you can run simple snmp requests against a Huawei device in your network.
sysDefaultIpSubnetMask
sys Default Ip Subnet Mask
1.3.6.1.4.1.207.1.4.167.81.1.6
IP subnet mask for the default IP address. This subnet mask, if modified, will take effect only when the configuration is stored & restored.
Back to AT-GS950-24-MIB MIB page.
IPHost Network monitor allows you to monitor sysDefaultIpSubnetMask on Allied Telesis device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Allied Telesis iMAP chassis right now.