Lonnie Bowling

Interface Monitoring Using PE's and Notifications

Discussion created by Lonnie Bowling Champion on Oct 10, 2011
Latest reply on Oct 11, 2011 by Lonnie Bowling

I am trying to monitor an interface to insure it is running OK.  There are two things that I am trying to get to work.


I have set up two health tags for the interface: "Device Status" and "Heartbeat"


In notifications I have set up a trigger that alarms if "Device Status" <> "Good".  This seems to work.


The other thing I am trying to get setup is if the heartbeat become stale.  To do this I have created a PE tag that I will us in notifications, it looks like like this:


prevval('heartbeat', '*') = 'heartbeat' 


The PE is schedule to execute every 30 seconds.


My PE is not working, it is always returning 1, so I must be missing something.  It seems like the previous value should never equal the current value.


Any help would be appreciated.  Also if there are any suggestions on a better way to do this I'm open to ideas, I a novice when it comes to working with interface health points.