Re: [Devmon] uptime on cisco devices

[Buchan M. <bg...@st...>]

On Monday 07 January 2008 20:32:10 Joshua Krause wrote:
> Has anyone come up with a way to show the true uptime on a cisco device via
> devmon?

Well, devmon uses what is available via SNMP ...

> If you look at the uptime in hobbit that is getting it's info from 
> devmon and then log into the switch and do a "show version" the times are
> different.  And what I was told by Cisco is that they uptime is rollover
> every 496 days.  So if I have switches that have been up 495 days once they
> go passed 496 hobbit will show them as being rebooted because when devmon
> poll's the device the "sysUptime" rolled over and now show's zero time.

Can you show the snmpwalk output for a device that has been up more than 496 
days ? Maybe we can do something about it. (None of our cisco devices have 
uptimes that high ... aren't you a few IOS releases behind?).

> Which hobbit assumes that it rebooted but it really hasn't.
>
> Is there anyway to get the time from the "show version" command or has
> someone come up with a better way of getting the uptime of the device?

If there is another way to get it via SNMP, sure.

For example, does the timeticks integer value roll over ? Or, should devmon 
hold the state of the uptime over polls to avoid alerting near the rollover 
value?

Regards,
Buchan