NZ static IP addresses to ping for testing

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cisconz

cisconz
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#3274256 21-Aug-2024 19:49

I normally use ntp1.ntp.net nz / ntp2.ntp.net.nz / ntp3.ntp.net nz. These are static addresses (ending in 18) and are provided by different ISP's in NZ (OneNZ, ICONZ and InternetNZ).

Hmmmm

MadEngineer

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#3274269 21-Aug-2024 20:25

I’m curious about those false positives. I seldom see failed pings to quad8 unless there’s heavy utilisation on the network being testing from. How many times does it fail? How many failures trigger an alert?

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neb

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#3274283 21-Aug-2024 21:56

It sends 8 pings every 2 minutes, I'm not sure what the normal threshold is since I've wound it down to 30%. Problem is that if you're doing that 720 times a day with whatever the original threshold was then at some point, purely by chance, you're going to "see" an outage that isn't actually there.

MadEngineer

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#3274913 24-Aug-2024 10:42

As an example, take a look at the process documented here for Meraki:

Connection Monitoring for WAN Failover - Cisco Meraki Documentation

(In reality that failover completes in seconds for a hard-down)

Depending on what you're doing with your down alerts you may need better testing.

You're not on Atlantis anymore, Duncan Idaho.

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