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Old 01-17-2008, 03:46 PM
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Join Date: Jan 2008
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Default Wireless Handover issues

Hi, new here.

I am currently investingating Wireless handoff procedures - and this looks like a good place to pick some brains.

We have a fairly large installation of AP's in a corporate network, using Cisco Aironet 1100's. This is a public hotspot type install.

The issues I have been experiencing is seamless handover when roaming. Surfing static webpages are fine, by when using real time protocols like Citrix, VPN's etc, the handover is too slow and resulting in cutting connections.

I have read a Cisco document about their seamless <150ms handover features but that requires modification to client firmwares, so that is out of the question.

Correct in saying the wireless handover procedure is handled largely by the wifi chipset firmware? If so...

I suspect the only way to reduce these handover times if to have a vendor spefici setup thoughout, is that right?

Any and all information welcomed.

Thanks
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Old 01-21-2008, 01:11 PM
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Join Date: Dec 2007
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Default

Basically handover is governed by the client. Before the station handsover to another servicing AP, it will check for the RSSI value between the station and the AP. Handover has got to do with the AP and the client. Mostly updating the driver in the client card should solve the issue. Also we need to consider the network design when impleenting wireless with VPN. We need to also see how the AP treats the VPN session emerging from the end station.
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