Deployed and support a biz / residential Unleashed install of 3x R710s in 3 separate buildings within close proximity. 25-35yards apart. Everything been good until the recent addition of some home chromecast devices. With my past config for 2yr 1 particular chromecast refuses to work on 5Ghz. Constant deauths until it gives up trying to connect all together or goes for 2.4Ghz and then works for a bit until it decides to use 5Ghz again then fails.
I had previously enabled 802.11r + 802.11k + smart roam of 4 when it was first setup 2yrs ago as I had a consistent issue with client devices not properly connecting the AP within the same building. Client devices would stick to a poorer signal AP in another building rather than using the one close by.
In my chromecast troubleshooting of deauths "leaving" - I've disabled 802.11r + 802.11k on the "home" ssid. That alone did not help. But changing the smart roam to 1 allowed 5Ghz to work. (But not sure how reliably yet)
Today I was onsite following up with a reboot after enabling adaptive band balancing as I noticed far too many 2.4Ghz clients when they should be 5Ghz. Once network came back online the chromecast was broken again.
I reviewed smart roam and discovered it reverted back to previous valve of 4. Didn't save to startup config.
I then set again and rebooted. Same. Why won't the cli smart roam config save to startup config? Am I forgetting something?