WAP571 cluster with singlepoint setup. Cannot access controller link

[TyGuy]

WAP571 x 9 AP cluster.

All AP's are working however the cluster controller IP is not available

the Controller AP is the only one that shows on the network scans  and you can login to the AP

but not the AP controller ip to manage the cluster.

no idea when the change happened over the last 2 months.

reboot etc. do nothing.  I wonder if it was a firmware fail that broke the cluster management.

Anything I should look at?

[Flavio Miranda]

"The Cisco WAP571 uses PoE power supply; unplug your Ethernet connection and plug it back in. With the power on, press the Reset button with an opened paper clip for less than three seconds, or until the lights go off."

No one like to hear it, but, sometimes the only way to fix devices like that is this way.  They does not allow deeper troubleshooting actions and sometimes uselles to insist.

[TyGuy]

I have opened a case. Will let uou know.