Flexconnect Roaming

[IT Services]

Good Afternoon,

I had a quick question about romaing with Flex Connect AP's. Looking at this article:

http://www.cisco.com/en/US/products/ps10315/products_tech_note09186a0080b3690b.shtml

As far as mobility/roaming is concerned. What do they mean by Fast Roam and Full Auth. Does Full Auth indicate that the clients do not essentially roam and that they will reauthenticate to the new AP?

Also looking at the Client Roaming setting in the WLC 5508 (running 7.2.111.3) does it only pertain to CCX enabled devices, or are these settings to configure roaming for non CCX devices as well?

I just noticed we have high density on one our of AP's in an office and it does not seem like clients are moving over to other AP's with stronger signal, etc.

[Stephen Rodriguez]

Fast Roam would be the 4-way handshake with the PMKID.

Full Auth would be that credentials get passed back to the AAA server.

Most of the 'Client Roaming' is CCX, the device has to understand what is being passed between the WLC and itself.  And I can't think of a time that I"ve actually had to change those parameters.

HTH,
Steve

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[IT Services]

Stephen Rodriguez wrote:
Fast Roam would be the 4-way handshake with the PMKID.
* Does this mean that the clients would see little if any interruptions when roaming to another AP?
Full Auth would be that credentials get passed back to the AAA server.
* Does this entail that the users would see interruptions in communication?
Most of the 'Client Roaming' is CCX, the device has to understand what is being passed between the WLC and itself.  And I can't think of a time that I"ve actually had to change those parameters.
*  Without modifying these at what threshold does the client roam to another AP within the same mobility group (controller).
These are currently in FlexConnect mode for us too.
HTH, 
Steve 

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[Stephen Rodriguez]

Realistically it's possible that the client won't see an issue either way.  I've been testing with WPA2/AES on a device that fully auths every time, and haven't had an issue.  But the potential that you can have an issue going to AAA increases.  But also depends on what type of devices you are using.

HTH,
Steve

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[IT Services]

What variables or thresholds does Roaming take into consideration?

Is any of these configurable? If so is it conifgured on the Client Roaming tab of the RF policy?