SNMP switch monitoring

[dclee]

I currently use SNMP to monitor all of our switches. I would also like to add the ability to be notified when a switch has been rebooted. Does anyone know the OID +description that gets incremented after a switch reboot ? All of our switches are 3548's.

Thanks for your help.

Cheers

Dave

[dclee]

Hmm I guess I could use the sysuptime OID and take the current value and do a greater than argument. Which would trigger the monitor if it rebooted as the counter uptime counter would start from zero again...

[David Stanford]

If the switch reboots you should see a coldStart trap (.1.3.6.1.2.1.11.0.0) sent to your NMS.

VARBINDS { sysUpTime, whyReload }

DESCRIPTION "A coldStart trap signifies that the sending protocol entity is reinitializing itself such that the agent's configuration or the protocol entity implementation may be altered."

You could have something querying sysUpTime as you also mentioned, but this trap would be more real time.