Cisco AIR-CAP3502I-E-K9 not connecting to WLC-8510

[MagnusGrindvikOren38983]

When i try to connect an AP on a specific VLAN the AP is constantly blinking green, and i get this error message from the AP using an console cable "Could not discover WLC. Either IP address is not assigned or assigned IP is wrong. Renewing DHCP IP." If i use another VLAN there is no problem at all. Any tips on how to fix this?

[marce1000]

 - Make sure hosts on that VLAN can reach the DHCP server and or that the helper-settings are in place, if needed.

 M.

[Scott Fella]

Make sure the ap gets an up address. What you mentioned is typical when the ap is not getting a dhcp address. Connect a laptop to the same port and verify the laptop gets an ip.

[MagnusGrindvikOren38983 · Accepted solution]

The dhcp scope was full of BAD ADDRESS, when i deleted those the AP's joined the WLC again.

[Scott Fella]

This is an issue with MS dhcp server and if the ap can't reach the controller. You will have to monitor and clean up bad address in the future.

[dijarvrella]

What is the Cisco WLC software version?

[Leo Laohoo]

That's because the other VLAN has DHCP Option 43 enabled.