All AP' s Rebooted

Nihas, Same issue here with 5 APs. FortiOS 5.2. They kept going up/down every minute . I rebooted everything . fortigate /switches / modems. started working again. been stable 48 hours + PS: where do i find the " AC Discovery Type" ?

If you connect to the FortiAP directly via HTTP you can find these settings

hi Dirkdigs, You can call the AP' s GUI through http://ipaddress if enabled. And kindly update if you get anything useful for trouble shooting. :) What I understand from the " control message " keyword, the FortiAP' s are using the protocol CAPWAP to maintain the trust relationship with the Controllers. And if you have a log that " Control message maximal retransmission limit reached" , that means the AP' s are failed to find the Controller. It might be an issue with the physical connectivity between the FGT and FAP' s. But how it will happen for all AP' s together. I have cross checked the cabling and power , everything is perfect. And Yes, It seems AP' s are not stable with the version 5.2, earlier I didn' t have this much issues , even though occurred the same few times.