Controllerless Networks

We have seen problems with other access points and iPhones not roaming properly when a network has IPv6. And we are seeing much the same on Arbuba (IAP-305), so it is likely to be an iPhone bug.

However, I would be interested to hear if others have the same problem, and if Aruba can shed any light on it, and maybe even come up with a work around.

It appears to be specific to 802.11r roaming. Having 802.11k and 802.11v without 802.11r are no problem. It also appears to be an issue when there is IPv6 on the network.

The symtoms are that sometimes (not always) the iPhone messes up the roam between APs, and thinks it has good signal and is connected. However no traffic flows at all (IPv4 or IPv6). You have to turn wifi off and on, on the phone, to clear it. Disabling 802.11r seems to completely fix this, but obviously stops the fast handover.

Any thoughts.

 Do not turn on 802.11r, v or k.  You should be able to achieve decent roaming performance with just adjusting the power and maybe removing the lower rates on the SSID.  Turning on r, v and k just makes your troubleshooting harder, because not all devices like 802.11r, especially..

UPDATE 6/2018 -  The updated RF and Roaming Optimization Validated Reference Design Guide (VRD) has been published and has updated recommendations about enabling 802.11v, k and r in user networks.  The VRD can be found here: http://community.arubanetworks.com/t5/Validated-Reference-Design/RF-and-Roaming-Optimization-for-Aruba-802-11ac-Networks/ta-p/432994

So what is the point of 802.11r, v or k exactly?

If you have clients that support those standards faithfully, it is good.  Unfortunately, many clients either do not, or might refuse to attach if they don't.  You have to experiment and weigh the risks with the reward based on what you are deploying.

So, do iPhones support these, or not - yes or no?

Which suggests iPhones do handled all of the protocols, howvere when 802.11r is enabled and there is IPv6 on the network it stalls some times and does not work, so back to my original question...

I get "You do not have sufficient privileges for this resource or its parent to perform this action." following that link!

The link was available to me. If you have issues you can paste the link on google you're able to get a cached page like this

https://webcache.googleusercontent.com/search?q=cache:nkk2_VRz5LYJ:https://support.apple.com/en-ca/HT202628+&cd=1&hl=en&ct=clnk&gl=ca