Que tal Argelimar,
Aqui estan unos pasos para hacer troubleshooting:
1. identifica si el problema pasa con todos los AP's o algunos. Si todos los AP's se desconectan al mismo tiempo verifica que la ip de management del WLC no esta duplicada est.
2. Identifica cada cuanto tiempo los APs se desconectan.
3. Identifica el modo en que los AP's estan configurados en flexconnect o local.
Si los AP's estan en local mode asegurate que la latencia sea de 100 ms o menos.
Si los AP's estan en flexconnect asegurate que la latencia sea de 300ms o menos.
4. realiza una sesion telnet/ssh al WLC y introduce el comando:
(Cisco Controller) >show ap join stats detailed <AP MAC>
donde <AP MAC> es la ethernet mac del AP, la salida sel comando es asi:
(Cisco Controller) >show ap join stats detail 00:14:f2:63:12:50
Discovery phase statistics
- Discovery requests received........................... 2
- Successful discovery responses sent................... 2
- Unsuccessful discovery request processing............. 0
- Reason for last unsuccessful discovery attempt........
Not applicable
- Time at last successful discovery attempt.............
Jan 24 12:21:20.547
- Time at last unsuccessful discovery attempt...........
Not applicable
Join phase statistics
- Join requests received................................ 2
- Successful join responses sent........................ 2
- Unsuccessful join request processing.................. 0
- Reason for last unsuccessful join attempt.............
Not applicable
- Time at last successful join attempt..................
Jan 24 12:21:30.669
- Time at last unsuccessful join attempt................
Not applicable
Configuration phase statistics
- Configuration requests received....................... 2
- Successful configuration responses sent............... 2
- Unsuccessful configuration request processing......... 0
- Reason for last unsuccessful configuration attempt....
Not applicable
- Successful configuration attempt......................
Jan 24 12:21:32.414
- Time at last unsuccessful configuration attempt.......
Not applicable
Last AP message decryption failure details
- Reason for last message decryption failure............
Not applicable
Last AP disconnect details
- Reason for last AP connection failure.................
Timed out while waiting for ECHO response from the AP
Last join error summary
- Type of error that occurred last......................
AP got or has been disconnected
- Reason for error that occurred last...................
Timed out while waiting for ECHO response from the AP
- Time at which the last join error occurred............
Jan 24 12:21:14.751
Para este caso en especifico debemos poner atencion en la seccion que dice:
Last AP disconnect details
- Reason for last AP connection failure.................
Timed out while waiting for ECHO response from the AP
Last join error summary
- Type of error that occurred last......................
AP got or has been disconnected
- Reason for error that occurred last...................
Timed out while waiting for ECHO response from the AP
- Time at which the last join error occurred............
Jan 24 12:21:14.751
Con esa informacion podemos tener una mejor idea de que esta pasando con los AP's. Este tipo de problemas generalmente estan relacionados con problemas de red, por eso es importante identificar si el problema pasa cada cierto tiempo, en algun area especifica, o con cierto modelo de AP's.
Saludos!
