snmp-get

// snmp.get: read one OID. An OID the agent does not have stops the collector, misconfigured.
// The collector reads how long the SNMP agent of a device has been running.
need('protocol:snmp');

output('uptime', 'number', array('label' => 'Time since the agent started', 'unit' => 'd'));

watch.below('restarted', 'Restarted recently', 'uptime', array('warning' => 1));

// sysUpTime.0 (SNMPv2-MIB), in hundredths of a second: 8 640 000 make a day.
$ticks = snmp.get('1.3.6.1.2.1.1.3.0');
value('uptime', number.round($ticks / 8640000, 2));