High ping reply time

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Ovays Anwar

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Jun 17, 2014
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Hi,
I work in an office where there are several access points on different locations. Some users are connected thru wired cable and some thru wifi-lans. Everything was working fine till today.
I am experiencing huge ping reply time on all devices (user pcs, laptops or cellphones) connected thru wireless connections only. Wired lan is working perfecting without any a single problem.
I checked every setting or anything that could possibly create problem but nothing helps. And now i am not able to figure out exactly where the problem is. Can anyone help pls?

 
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High latency on wireless generally means the equipment is detecting errors and retransmitting the data over and over which to you appears as high latency. This is going to be hard to find. It could be simple interference if for example you had all your AP on the same channel but it could be interference from other wireless devices you do not own or control. All you can try to do is change the channels and hope to reduce the overlap between your devices and between your devices and external equipment.

The other possibility is overloaded networks. This is pretty easy to test just come in when nobody else is around and see if it runs better. There is also the rare case of broadcast storms. If you were to have a loop of some sort in...
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cirdecus

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Feb 14, 2008
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If you can give me more information about how many access points, what brands and what they are connected to such as router/etc that would help. What kind of pings times are you getting on wireless vs wired?

Sometimes this can happen when a router is plugged in to the network by a user backwards.
 
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Ovays Anwar

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Jun 17, 2014
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4,510
There are more than 10 access points (Linksys and Zyxel) on different locations however I have only one (Zxyel) on my floor. They all connected thru proper wired lan cables from the main router. On wired its <1ms or at max 10ms but on wireless its more than 100ms to 3000+ms.
By user backwards you mean there might be problem from user end?
 
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bill001g

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Aug 9, 2012
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High latency on wireless generally means the equipment is detecting errors and retransmitting the data over and over which to you appears as high latency. This is going to be hard to find. It could be simple interference if for example you had all your AP on the same channel but it could be interference from other wireless devices you do not own or control. All you can try to do is change the channels and hope to reduce the overlap between your devices and between your devices and external equipment.

The other possibility is overloaded networks. This is pretty easy to test just come in when nobody else is around and see if it runs better. There is also the rare case of broadcast storms. If you were to have a loop of some sort in your switches you could be sending excessive amounts of broadcast traffic to the AP. Wired networks are affected by this also but they are so fast no days you do not always see issues like this. It could also be a machine sending excessive data because of a virus or other questionable software.

You really are going to have to start testing to isolate the cause, turning off all but 1 AP is a good start.
 
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