[Devmon] Cisco 2960 uptime wrap

[Bruce F. <bfe...@ba...>]

I'm using devmon with xymon and I got an interesting surprise this am.  An alert for CPU/uptime.

The messages indicated last reboot reason was power up.

The OID in the template for this is .1.3.6.1.2.1.1.3.0 RFC1213-MIB::sysUpTime.0 = Timeticks:

After investigating the switch and seeing it thought it had been up over a year, I did some googling and found that OID is a 32 bit int and it wraps at 496 days, resulting in xymon 
thinking the device just booted.

I can see why that OID might be used; it returns not just the timeticks but also an uptime in hours:minutes:seconds.  Easy to parse, but "prone" to this error.

Can anyone think of a better OID to use?