With IPHost Network Monitor you can run simple snmp requests against a Alcatel device in your network.
mirrorUnblockedVLAN
mirror Unblocked VLAN
1.3.6.1.4.1.52.4.12.30.1.8.1.1.5
A VLAN identifier which specifies the VLAN identifier that must remain unblocked no matter what is the output of the spanning tree algorithm.
Back to ALCATEL-IND1-PORT-MIRRORING-MONITORING-MIB MIB page.
IPHost Network monitor allows you to monitor mirrorUnblockedVLAN 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.