I am trying to create a monitor to check the route through to an external service, the service drops once in a while and I would like to determine at which point it fails. Can someone details how to create a custom TraceRT sensor and how to get the results to list all hops and whether they are up or down?

Article Comments

Hi Paul,

A Trace Route works by sending a number of Pings to the destination device. The first Ping starts with a TTL set to 1 and this gets incremented with every next Ping. This way the hops in the route will respond one by one.

The process of sending Pings will have to be stopped when the destination device responds or a maximum hop count is reached.

Your sensor could go into an error state when the destination device does not respond and show the last hop that did respond.

Keep in mind that not every hop might respond to ICMP (Ping) requests.


Mar, 2014 - Permalink

This sounds great, but how do I configure it? I would like to see an output similar to this:

Hop 1 - x.x.x.x - OK
Hop 2 - x.x.x.x - OK
Hop 3 - x.x.x.x - OK
Hop 4 - x.x.x.x - FAILED
Destination - x.x.x.x - FAILED

So that I can clearly see Hop 4 is at fault etc...

Thanks

Paul


Mar, 2014 - Permalink