Question on 802.11r

Ben Greear greearb
Mon Nov 11 21:36:22 PST 2013

On 11/11/2013 01:26 PM, Ben Greear wrote:
> On 11/11/2013 09:50 AM, Ben Greear wrote:
>> On 11/11/2013 09:40 AM, Dan Williams wrote:
>>> On Mon, 2013-11-11 at 09:25 -0800, Ben Greear wrote:
>>>> Hello!
>>>> I am trying to do some testing of 802.11r with some Cisco APs and controller
>>>> and linux + supplicant on the station side.
>>>> I am curious if anyone has any suggestions on how to go about making supplicant
>>>> do it's part of the deal.  I am thinking that maybe I need to send wpa_cli commands
>>>> to 'gently' move the station from one AP to the other without doing a total
>>>> station reset/reconfigure?
>>> Are you looking for "wpa_cli roam <bssid>" ?
>> That sounds very promising.  I'll give that a try.
> So, it seems to do what I want.  I'm testing with APs on different
> channels, in case that matters.
> A question though....any idea what that MLME command failure
> is about and why it decides to scan again?

I think much of my problem is that I confused the optimistic
key caching with 802.11r proper.

Once we started using FT-EAP everything started working
as expected.

Now, I have a somewhat related question:  Should the station
re-acquire DHCP lease after successfully roaming?  DHCP takes
longer than association (about 600ms v/s 150ms, though it
varies widely in my testing).  So, it would be nice to skip
DHCP, but I'm not sure if that is how real-world networks
are configured?


Ben Greear <greearb at>
Candela Technologies Inc

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