With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
bertLoopbackOperation
bert Loopback Operation
1.3.6.1.4.1.351.110.6.1.15
specifies the operation of loopback (up or down).
Back to CISCO-WAN-SRM-BERT-MIB MIB page.
IPHost Network monitor allows you to monitor bertLoopbackOperation 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.