improve roaming

[Azariel Rodriguez Parra]

I´m trying to find the best configuration to improve the roaming in a WLC 7.3

I changed    the power threshold under the TPC to -67 and in the client roaming I put in custom mode and the

minimun RSSI in -78 dBm.

but I was wondering if there is a specific configuration to improve the roaming.

Thanks...

[Stephen Rodriguez]

Roaming is a client decision.  All the WLC can do is try to influence the client.

Now, what you can do, is set the lower data rates to disabled, pretty much anything lower than 11Mbps, and shrink the cell size.

HTH,
Steve

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[Saurav Lodh]

I found the below steps , in order to improve the client roaming :

Navigate to your WLC -> 802.11a/n or 802.11b/g/n (depending on which frequency you want to customize) -> Client Roaming.

Change the mode to custom to edit the default values for the rest of the parameters.

Then, minimum rssi. If a clients RSSI value is below this threshold it will not associate/authenticate to the access point, instead it will continue to look for a better signal from different access points. Valid values for this field are -80 through -90. The understanding is that the signal strength/quality will be so low reliable communication will not be established.

Next setting called hysteresis this value is in dB and states how much stronger the signal of another access point has to be before a client decides to roam to it. This is useful if you have multiple access points in close proximity of each other or clients are moving between the edge of coverage of different access point. The higher this value the closer a client needs to be to an access point for it to associate to the second access point. Valid ranges are from 2 through 4 dB.

Now we have the scan threshold this is another RSSI value range. When the wireless client’s RSSI drops below this threshold the client will begin actively scanning for another access point it can receive a stronger signal from. Valid values range between -70 through -77.

The last field on the page is the transition time this is the amount of a client is going to see a better signal from neighboring access, before it attempts to associate to the second access point. The client determines a better signal when its RSSI drops below the scan threshold and it sees a signal from a neighboring access point higher than the scan threshold.

These factors improve client roaming.

[Leo Laohoo]

In addition to Steve's post, I'd like to add:  Please ensure the client wireless card driver is kept up-to-date.