With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
stpxSMSTInstanceVlansMapped1k2k
stpx SMST Instance Vlans Mapped1k2k
1.3.6.1.4.1.9.9.82.1.14.5.1.2
A string of octets containing one bit per VLAN for VLANS with VlanIndex values of 0 through 2047. The first octet corresponds to VLANs with VlanIndex values of 0 through 7; the second octet to VLANs 8 through 15; etc. The most significant bit of each octet corresponds to the lowest value VlanIndex in that octet. For each VLAN, if it is mapped to this MST instance, then the bit corresponding to that VLAN is set to '1'. If the length of this string is less than 256 octets, any 'missing' octets are assumed to contain the value of zero.
Back to CISCO-STP-EXTENSIONS-MIB MIB page.
IPHost Network monitor allows you to monitor stpxSMSTInstanceVlansMapped1k2k on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.
