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Fluctuating Ping

adam_carter_607
New Contributor II
I have deployed a Zonedirector 1100 and 6 x zf7372 APs. The APs are connected to the same PoE switch as the ZoneDirector.

APs are not configured for mesh mode.

Signal coverage is good, but I am getting fluctuating pings when testing from various devices - it follows the pattern 1 good ping (1ms), 1 average pint (~100ms), then one higher ping (200-300ms) - then repeat.

For testing I am pinging the IP address of the ZoneDirector to eliminate any other network issues. Checking the logs it shows the channel selection and client association to be static - I am not moving around but in a fixed position and the ZD reports this to be accurate:

Reply from 10.10.1.20: bytes=32 time=2ms TTL=64
Reply from 10.10.1.20: bytes=32 time=10ms TTL=64
Reply from 10.10.1.20: bytes=32 time=211ms TTL=64
Reply from 10.10.1.20: bytes=32 time=136ms TTL=64
Reply from 10.10.1.20: bytes=32 time<1ms TTL=64
Reply from 10.10.1.20: bytes=32 time=2ms TTL=64
Reply from 10.10.1.20: bytes=32 time=133ms TTL=64
Reply from 10.10.1.20: bytes=32 time=10ms TTL=64
Reply from 10.10.1.20: bytes=32 time=249ms TTL=64
Reply from 10.10.1.20: bytes=32 time=2ms TTL=64

I have tested on both 2.4GHz and 5GHz channels but I get the same result.
The pings never drop and I get good throughput when transferring data, but I am not sure the latency should fluctuate as much as this.

Firmware on ZD is the latest ( 9.6.1.0 build 15)
Does anyone have any ideas?

Thanks
15 REPLIES 15

keith_redfield
Valued Contributor II
Try repeat traceroutes. My suspicion is you are seeing a routing issue.

adam_carter_607
New Contributor II
Thanks for the reply Keith - after some further investigation last night I found the issue - my laptop. I disabled and then re-enabled the wireless interface causing it to re-associate with the wireless network and then the issues were magically solved. Rock steady 1-2ms pings when stationary and when roaming about 🙂 It doesn't explain why it happened, but other devices are now connecting and not showing the same symptoms.

Large humble pie just eaten for breakfast!

keith_redfield
Valued Contributor II
Adam - truly appreciate you sharing this (esp with the pie). These discussions are helping hundreds of other customers fix or avoid similar issues so it's always nice to hear the resolution.

greg_morgan_610
New Contributor
I am having this exact issue. Have you had no further issues since disabling and renabling your wireless card Adam? I have never experienced this with any other AP, it's a bit of a concern... Image_ images_messages_5f91c413135b77e24794da7b_66a58936e4dd6369efde1ef2a670a5a5_Litsoninstallpings_inline-a8e275f9-8bd9-45c5-ad39-88529d7ded44-565777970.png1384376796
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