Chekc if LWAPP and CAPWAP ports are open to buid a tunnel from AP to wlc.
LWAPP port 12222 and 12223
CAPWAP: 5246 - control, 5247 - data
Example:
When an AP running a version before 5.2 joins a 5.2. WLC, the following process is used:
AP joins the 5.2 controller using LWAPP 12223.
AP downloads 5.2 code and reboots.
AP joins the 5.2 controller using CAPWAP 5246.
If the AP is unsuccessful, it falls back to LWAPP. *note that a CAPWAP AP will be not be allowed to register using LWAPP to a CAPWAP WLC*
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