Wireless Access

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Occasional Contributor II
Posts: 22
Registered: ‎08-14-2013

WIRELESS user ping AC with long dely

1AC 650 OS 6.4 

4 AP125

2014/11/20  deployment  and wireless is fine,user mainly use LYNC on laptop.

recenty the wireless is  pool,wireless user ping AC with long dely.

how can i make it well.thank you

Reply from 10.2.64.38: bytes=32 time=8ms TTL=64
Reply from 10.2.64.38: bytes=32 time=4ms TTL=64
Reply from 10.2.64.38: bytes=32 time=4ms TTL=64
Reply from 10.2.64.38: bytes=32 time=182ms TTL=64
Reply from 10.2.64.38: bytes=32 time=218ms TTL=64
Reply from 10.2.64.38: bytes=32 time=175ms TTL=64
Reply from 10.2.64.38: bytes=32 time=255ms TTL=64
Reply from 10.2.64.38: bytes=32 time=4ms TTL=64
Reply from 10.2.64.38: bytes=32 time=2ms TTL=64

 

Valued Contributor II
Posts: 804
Registered: ‎12-01-2014

Re: WIRELESS user ping AC with long dely

Hi,

 

It is very difficult to diagnose the issue with the information provided. there may be many reasons,

first of all we need to understand whether this is at wireless or wired side. as a  work around

1. Disable STP on the controller

2. Look at the Controller CPU utilisation

3. Look at retry count.

 

Please feel free for any further help on this.

Cheers,
Venu Puduchery,
[Is my post helped you ? Give Kudos :) ]
MVP
Posts: 1,310
Registered: ‎11-07-2008

Re: WIRELESS user ping AC with long dely

It is VERY likely that increase in ping time was when your device was 'doing something' (like checking mail, updating software, doing a check out against the network for something, etc). Random blips in the ping latency are almost always that, and the only way to ensure it's not is to uninstall and disable all essential and non-essential software that would need network connectivity (which is kind of not doable). A far more effective measure of the quality of your connection is to do a speed test using iPerf, Ixia, etc, but again, the above is relevant as the device checking for mail will show a decrease in throughput.

 

It could also be your device going in and out of powersave mode, which on some devices you can disable by turning off power-save, or by setting the wireless card to 'aggressive' or whatever setting indicates it will use the most power.

 

If the majority of your pings are fine and you just see those blips, it's likely just fine.

Jerrod Howard
Sr. Techical Marketing Engineer
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