system

// The name of a switch, a router or a firewall and its time since boot, by SNMP (SNMPv2-MIB): sysName, and
// sysUpTime, the time since the SNMP agent started, which on such a device starts with it. A reboot shows
// as a time since boot shorter than the "Recent reboot" threshold.
// sysUpTime counts hundredths of a second on 32 bits: it wraps every 497 days, which the watch takes for a
// reboot.
need('protocol:snmp');

output('system-name', 'text', array('label' => 'Device name'));
output('uptime', 'number', array('label' => 'Time since boot', 'unit' => 'h'));

watch.below('rebooted', 'Recent reboot', 'uptime', array('warning' => 0.5));
watch.expect('system-name', 'Unexpected device name', 'system-name', array(
    'help'    => 'Raises when the device answers with a name other than those given: the address now reaches another device.',
    'enabled' => false,
));

value('system-name', snmp.get('1.3.6.1.2.1.1.5.0'));
value('uptime', number.round(snmp.get('1.3.6.1.2.1.1.3.0') / 360000, 2));