With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
bstunRouteType
Cisco Blocked Serial Tunneling Route Type
1.3.6.1.4.1.9.9.35.1.4.1.1.3
The type of identification of the remote partner. If ip then the value is in bstunRouteIP; if serial or serialDirect then the value is in bstunRouteSerial; if bip or apip then the value is in bstunRouteIP, bstunRouteBIPLocalPort and bstunRouteBIPForeignPort.
Back to CISCO-BSTUN-MIB MIB page.
IPHost Network monitor allows you to monitor bstunRouteType 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.