With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
bstunPeerKeepaliveLimit
Cisco Blocked Serial Tunneling Peer Keepalive Limit
1.3.6.1.4.1.9.9.35.1.1.4
The number of keepalives which can be missed in a continuous interval before session declared down in this router.
Back to CISCO-BSTUN-MIB MIB page.
IPHost Network monitor allows you to monitor bstunPeerKeepaliveLimit on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.