AIR-CT3504-K9, running 8.5.161.0, with bug CSCvj33094 exhibiting shortly after connecting two AP-COS's (1815) in local mode directly to the PoE ports of the WLC. Everything works fine initially, but as soon as client activity starts picking up, the AP will disjoin the controller with "Failed to get ARP entry for {WLC's IP}," followed by complaints that it cannot find an AP Manager, which is expected after the ARP failure. Connecting just one AP instead of two does not fix the issue.
The workaround described in BST is valid; the issue does not occur when the AP's are connected to another switch in the network. However, because of the limited availability of PoE switch ports, no options for PoE injectors, and other peculiarities of the site, we would prefer to connect the two AP's to the WLC directly. This benefit is mentioned in the datasheet, and it was one of the reasons that led to the purchase of this model.
Cisco's severity classification of "4 Minor" means this bug probably won't be fixed anytime soon in 8.5. Downgrading to 8.2 is not an option as it does not support the 1815 AP's, neither is Mobility Express due to the number of AP's on this site. Does anyone have satisfactory experiences with 8.8.130.0 running on the 3504 with directly connected AP-COS? Any alternative workaround suggestion would be appreciated as well.
