Help with alarm when increased latency for a device

Help
1

I need help to set off an alarm if the latency towards a device suddenly increase by “more than 20ms” compared to polling 60 minutes ago, and still experiencing an increased latency since.

Reason is to pick up and flag for VPN/SD-WAN etc tunnels that may be affected by ISP operator re-routes/changes in peering etc.

Assistance would be much appreciated.

Regards
Martin

2

You might have a look at dpinger. Dpinger is used in open source firewalls to monitor link latency and loss. Natively it supports alarms based on absolute (rather than time-relative) values, but you can easily implement time relative rules above it.

HTH

1 Like
3

Thanks for this @dennypage - I was more looking for a rule set/format to use.

4

I don’t think it’s possible anymore, we used to store the results of the icmp checks in the DB but this was removed a few months ago.

All you can do is alert based the time taken for an icmp check to be performed at each poll time.

5

OK thanks mate, I guess looking at a listing of the device group manually, may do the trick somewhat…

Best regards
Martin

6

You need to measure latency before you can alert on it. :slight_smile:

7

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