We've upgraded two days ago from 7.2 to 184.108.40.206. After that VLAN trunking wasn't working anymore. Like you described, I only could reach the MAP on the other side via the native VLAN.
RAP is a AIR-LAP1262N-E-K9
MAP is a AIR-CAP3502I-E-K9
After a bit debugging and logging in into the MAP via SSH I've seen that the bridge group config was missing on the APs ethernet interface. Adding the bridge group commands did fix the issue. However the commands don't survive a reboot of the AP.
bridge-group 1 spanning-disabled
no bridge-group 1 source-learning
So this is more some kind of a workaround. It would be interesting to know if you ran into the same issue.
thanks for the reply, i got some info from our local cisco group that there is a bug in the 7.4 code giving issues with bridge mode but they have not done any testing to confirm. I wanted to upgrade the controller to 7.5 but client wanted connection up, so i used the following reference
Transferring Crash file from standby: Login to the Active WLC in HA.
From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
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