With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cagwIdleModeExitFailures
Cisco's ASN Gateway Idle Mode Exit Failures
1.3.6.1.4.1.9.9.638.1.3.1.1.1.106
The number of idlemode exit failures.
Back to CISCO-ASN-GATEWAY-MIB MIB page.
IPHost Network monitor allows you to monitor cagwIdleModeExitFailures 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.