With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
vtpVlanMtu
vtp Vlan Mtu
1.3.6.1.4.1.9.9.46.1.3.1.1.5
The MTU size on this VLAN, defined as the size of largest MAC-layer (information field portion of the) data frame which can be transmitted on the VLAN.
Back to CISCO-VTP-MIB MIB page.
IPHost Network monitor allows you to monitor vtpVlanMtu on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.
