hh3cDhcpServer2PoolNetworkMask 1.3.6.1.4.1.25506.2.122.2.1.1.5

Network mask of the primary subnet in a DHCP pool. The SET operation to this object ought to be with the SET of hh3cDhcpServer2PoolNetwork together, and any SET operation alone to this object will be regarded as an invalid operation.