Resolved! Wireless AP H-Reap vlan mapping changes.
Our Wireless AP is AIR-CAP3502E-C-K9 with WLC 5500. The issue is that in H-REAP VLAN Mapping the VLAn ID suddenly changes and if I checl the logs I see no downtime on the AP. Please note that this happen to random AP's and sometimes all the AP's in c...