I am facing problem with 1852 AP with 2504 WLC. It disconnected the clients automatically. Please find the attachment log report for that clients.
Please advise me the solution.
I googled a bit for this message and it seems this can happen if another client with the same IP address tries to join. Do you have statically configured IP addresses on the clients or maybe two DHCP servers running and configured?
Which software version are you running?
You are running the very first 8.3 release:
Primary Boot Image............................... 22.214.171.124 (active)
This one has a lot of bugs with the x8xx series (Wave2) access points, like your 1852. I recommend to you to upgrade to the freshly released 126.96.36.199.
Release notes: https://www.cisco.com/c/en/us/td/docs/wireless/controller/release/notes/crn83mr2.html
Release notes of the previous version, but still newer than your running (if you like to go through the list of fixed bugs):
Every bug listing a 1800, 2800 or 3800 might affect your 1852.
You suggesting to use 188.8.131.52, but the Cisco suggesting 184.108.40.206 (ED) version.
Please find the following link: https://software.cisco.com/download/release.html?mdfid=283848165&flowid=&softwareid=280926587&release=220.127.116.11&relind=AVAILABLE&rellifecycle=ED&reltype=latest
Please suggest me what version I should use.
True, they normally wait a few months on the download site to recommend newer versions.
Use this document for the TAC recommended builds: https://www.cisco.com/c/en/us/support/docs/wireless/wireless-lan-controller-software/200046-TAC-Recommended-AireOS.html
You will not (yet) see 18.104.22.168 there, but this build was released because of those mentioned bugs there.
As you are already running a 8.3 release, you might loose features by going to 8.2.x.