Problem with hostapd and 11r roaming.

Ben Greear greearb at
Fri Jun 7 14:22:22 PDT 2019

On 6/7/19 9:18 AM, Ben Greear wrote:
> Hello,
> I'm using a fairly recent, and fairly hacked upon hostapd, with a modified 4.20 kernel.
> I set up two AP interfaces on two radios on two machines (8 hostapd total),
> and clustered them as an 802.11r cluster.
> I started two station interfaces on a separate system and have them roam between
> the vap every 10 or so seconds.  After around 10 roams total, I start getting
> roam failures due to 'code-17' response.
> I debugged the AP system, and the kernel is rejecting the station-add, due to this
> logic below.  In the failure case, statype is 0, which is ap-client.

Looks like this is related to PMF/MFP.  When that is disabled, it works nicely.

I'll have to try with some ath9k systems to try to understand if it is related
to ath10k or not...


Ben Greear <greearb at>
Candela Technologies Inc

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