With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
bstunLocalAck
Cisco Blocked Serial Tunneling Local Ack
1.3.6.1.4.1.9.9.35.1.2.1.1.3
Indicates if the BSTUN connection is locally acknowledged. TRUE-> BSTUN connection is locally acknowledged FALSE-> BSTUN connection is not locally acknowledged ::= { bstunGroupEntry 3 } SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION The number of unroutable frames received by this group from the remote partner. They were unroutable because the address was not recognized; that is there is no bstun route command configured for this address. This indicates that the configuration in this router is incompatible with the peer router.
Back to CISCO-BSTUN-MIB MIB page.
IPHost Network monitor allows you to monitor bstunLocalAck 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.