With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
bstunRouteBIPForeignPort
Cisco Blocked Serial Tunneling Route BIP Foreign Port
1.3.6.1.4.1.9.9.35.1.4.1.1.17
If bstunRouteType is bip then this is the for port used to connect to the remote peer.
Back to CISCO-BSTUN-MIB MIB page.
IPHost Network monitor allows you to monitor bstunRouteBIPForeignPort 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.
