Consider SNMP-FRAMEWORK-MIB::snmpEngineTime.0

This plugin uses DISMAN-EVENT-MIB::sysUpTimeInstance which expresses uptime in 1/100 sec in a 32-bit value. So it will roll over in 496 days and may result in spurious alerts at that time.

If your device supports SNMP-FRAMEWORK-MIB::snmpEngineTime.0 (.1.3.6.1.6.3.10.2.1.3.0) that OID’s result is expressed in seconds and can be monitored by simply using check_snmp.

check_snmp -H router -C public -o SNMP-FRAMEWORK-MIB::snmpEngineTime.0 -c 2000