With IPHost Network Monitor you can run simple snmp requests against a Alcatel device in your network.
vlanIpMask
vlan Ip Mask
1.3.6.1.4.1.52.4.12.30.1.12.1.1.10
Subnetwork mask for VLAN IP Address. Default is class level mask for the ip address.
Back to ALCATEL-IND1-VLAN-MGR-MIB MIB page.
IPHost Network monitor allows you to monitor vlanIpMask on Alcatel device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Alcatel IP phones right now.