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Problems with Cisco AP

Posted on 2014-11-26
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Last Modified: 2014-12-18
Good day to all,

I have an access point (Cisco Aironet 1240AG) in the warehouse, this month a huge project started and there is a lot of traffic in the warehouse and I started having problems with the AP.  We do have a strong signal but the internet is really slow and once in a while it drops the connection.  When I do a ping to any website I get fast replies for the most part but I also get timeouts.

I checked everything, cables, antennas, I moved the AP to different places, played with different channels but nothing worked.  So I decided to replace the AP, I got a Cisco WAP4410N and not surprisingly I got exactly the same problem with the new AP.

Hope you can give me a few tips of what to do.

thanks...
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Question by:elletter
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LVL 45

Expert Comment

by:Craig Beck
ID: 40467732
Can you install a program like InSSIDer and do a scan to see if there are any other WLANs about?
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Author Comment

by:elletter
ID: 40467841
Yes i can, working on it right now.
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Author Comment

by:elletter
ID: 40467844
I'm guessing that i need to get the Scan + Troubleshoot or can i just the the basic one?
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LVL 45

Expert Comment

by:Craig Beck
ID: 40467859
Just get InSSIDer Home, should be free.  You just need to scan for a few minutes in the first instance, then post a screenshot.
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Author Comment

by:elletter
ID: 40467904
working on it.
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Author Comment

by:elletter
ID: 40468000
Here is the screen shot
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LVL 45

Expert Comment

by:Craig Beck
ID: 40468017
The signal is quite weak.  I'd be looking for around -67dBm at least in order to maintain a solid connection.

What antennas do you have connected to the AP, and how high is it?
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Author Comment

by:elletter
ID: 40468127
sorry about that i was too far away.  i put the AP back on its original place.  The AP is located in a warehouse and i have it in the ceiling of the warehouse with 2 antennas (2.4Ghz 9dBi)  here is another screenshot you can see the signal is strong but it kept dropping my connection this time:

AP-statistics.jpg
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LVL 45

Expert Comment

by:Craig Beck
ID: 40468142
That's better.

Can you change the channel to 11 and test again?
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Author Comment

by:elletter
ID: 40468167
will do that first thing Friday morning, hope you can help.  thanks a lot for your help.
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Author Comment

by:elletter
ID: 40470844
here are the results for Channel 11, everything looks good but you can see that the connection to the AP still times out.  This happens with all the wireless devices and same result when I switch the AP to a brand new AP.  any ideas??
channel-11.jpg
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LVL 45

Accepted Solution

by:
Craig Beck earned 500 total points
ID: 40470848
That just looks like really bad interference to me.  I'd take the AP to a place where there's not much other RF about and test the AP.
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Author Comment

by:elletter
ID: 40470862
Can this interference be prevented by getting an AP with a 5GHz band?
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LVL 45

Expert Comment

by:Craig Beck
ID: 40470955
Yes as long as your devices support 5GHz.

What AP do you have?
0
 

Author Comment

by:elletter
ID: 40470959
currently i have a Cisco Aironet 1240AG, and got a brand new Cisco WAP4410N, in the hopes that it will resolved the problems but no luck.
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Author Closing Comment

by:elletter
ID: 40508339
It turned out to be real bad RF interference from some equipment being used in the warehouse.
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