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Old 03-03-2010, 01:55 PM
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Join Date: Mar 2010
Posts: 2
Default wireless slow reconnects or slow roaming

Hi,

I have a doubt regarding wireless reconnections.

I have 2 Linksys WAP2000 access points, both configured as "access points", and a Windows XP SP2 native supplicant/client with a Ralink chipset and latest driver rt2860 version 1.4.12.0.

I set identical settings in both access points: SSID, WPA2-AES, Radius, EAP-TLS. Theoretically, this should make roaming seamless.

However, the whole roaming process takes at least 35 seconds (during which I have no connectivity; so it's lethal for real-time apps).
This 35-second time lapse also occurs when I only have 1 access point and go out of its wireless coverage and then back in. ie. it ALWAYS takes 35 seconds to authenticate, whether it's roaming or not.

What could be the root cause of this?
Is it just a Ralink driver issue?
Does anyone have experience with this driver and are there options I could tweak (haven't found any useful options yet)?

Thanks
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Old 03-05-2010, 04:00 PM
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Join Date: Mar 2009
Location: Manchester, UK
Posts: 68
Default

Welcome to the world of 'user expectations' and manufacturers marketing ploys!

Just because the AP's share the same SSID and keys, doesn't mean roaming will be much faster. By their nature fat access points arent really designed for roaming as you associate with the actual AP, not it's SSID. So the reconnection time, allbeit slower than I would expect, is a definate reality. You have to deop one connection, then reassociate with the new AP so wou ALWAYS see a drop out. You need to understand the difference between portability and mobility. The method ou are usin is great for portability but not mobility.

What is your need for roaming, business or home? If budget wasn't a problem, you would go for a managed solution, whereby the switch handles the handoff between AP's at which stage you would be talking miliseconds, not seconds. However we install the Extricom system which uses a blanket solution. This means all AP's are on one channel, competely mitigaing ANY handoffs when roaming, but it is an enterprise class solution!

HTH
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