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Wireless slowness


we have below access points in our environment. We usally get slowness issue in wireless. do i need to put all AP with same model to remove this slowness.

2 AIR-LAP1142N-A-K9

17 AIR-LAP1131AG-A-K9

5 AIR-CAP-3502I-A-K9

any help would be appriciated.



Wireless slowness

well, the 1142 and 3502 support 802.11n and the 1130 only supports 802.11g  So when you roam between them you would see a differnce in your throughput.

Further, to get 802.11n speeds you need to be using WPA2/AES encryptions not WPA/TKIP.


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HTH, Steve ------------------------------------------------------------------------------------------------ Please remember to rate useful posts, and mark questions as answered
Hall of Fame Super Silver

Re: Wireless slowness

Just to add to Steve's comment. 802.11n clients tend to stick to 802.11n access points so they prefer to roam to another 802.11.n AP. You should look at the client load on the 1131's compared to the other access points. If you see more clients associated to the 802.11n AP's, that can be why. They might be connecting at a lower rate due to the client sticking to an 802.11n access point than roaming to an 1131.

You need to diagnose what the slowness is also, is it when they are connect to AP x, what are they connected at, do you see anything on the WLC logs, is it reproducible?

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Hall of Fame Super Gold

Re: Wireless slowness

You'll need to provide more info.

1. What kind of wireless clients are you using?
2. What kind of wireless clients are complaining of slowness?
3. Does this issue happen all throughout the day or during certain times?
4. What is the signal strenth from the client(s) when slowness occurs?
5. What protocol does this happen? 802.11 a/b/g/n?

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VIP Purple

Re: Wireless slowness

Hi Rajesh,

Addition to Steve,Scotts inputs please do the following on your WLC

1. Disable low data rates (1,2,5,5,6,9,11 Mpbs) in 802.11b/g/n band

2. set the channel width to 40MHz in 802.11a/n (Wireless -> 802.111/n -> RRM -> DCA)

Where 1st one help overall users & 2nd one help whoever having 802.11n+ Channel bonding capability in 5GHz band (like iPhone 5/etc)



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