Risoluzione dei problemi relativi a un access point che non si unisce a un controller
Introduzione
In questo documento vengono descritti i nuovi comandi show ap join status della versione 4.2.61.0 del controller e viene spiegato come utilizzarli in modo efficace.
Prerequisiti
Requisiti
Nessun requisito specifico previsto per questo documento.
Componenti usati
Il documento può essere consultato per tutte le versioni software o hardware.
Le informazioni discusse in questo documento fanno riferimento a dispositivi usati in uno specifico ambiente di emulazione. Su tutti i dispositivi menzionati nel documento la configurazione è stata ripristinata ai valori predefiniti. Se la rete è operativa, valutare attentamente eventuali conseguenze derivanti dall'uso dei comandi.
Convenzioni
Per ulteriori informazioni sulle convenzioni usate, consultare il documento Cisco sulle convenzioni nei suggerimenti tecnici.
Premesse
In questo documento vengono fornite informazioni sui nuovi comandi show ap join status della versione 4.2.61.0 del controller e viene spiegato come utilizzarli in modo efficace. Per ulteriori informazioni, consultare il documento sulla risoluzione dei problemi relativi a un Lightweight Access Point che non si unisce a un Wireless LAN Controller per risolvere in modo efficace i problemi relativi al mancato collegamento di un Access Point a un controller. Se l'access point non invia un join al controller, è necessario eseguire la risoluzione dei problemi nell'access point.
Questo documento si applica a tutte le versioni del controller (WLC) da 4.2.61 alla versione più recente di 7.2.103.
Diversi output di esempio di diversi errori che si verificano sul controller sono dopo le sezioni Background Information e Troubleshoot Algorithm.
Nella versione 4.2.61.0 del controller, il controller ora tiene traccia di tutti i punti di accesso che inviano una richiesta di individuazione e dei punti di accesso ai quali invia una risposta di individuazione. Tiene inoltre traccia dei punti di accesso che tentano di collegarsi al controller e dell'esito del processo. Per risolvere i problemi relativi al mancato collegamento di un access point al controller, il controller dispone di due nuovi comandi CLI (console o SSH):
show ap join stats summary [all | AP_Mac_Address]
show ap join stats detail
Risoluzione dei problemi dell'algoritmo
Per verificare gli access point che non si uniscono al controller, usare il comando show ap join stats summary all. L'access point viene inserito nell'elenco show ap join status non appena il controller riceve una richiesta di rilevamento.
Nota: il controller non rimuove mai l'access point dall'elenco show ap join status finché non viene riavviato. In alcuni casi, i punti di accesso non riusciti hanno tentato di accedere per più di un giorno o sono completamente offline. Utilizzare il comando show ap join status detail per verificare quando l'ultima richiesta di individuazione e l'ultima richiesta di join sono state inviate dall'access point per determinare se l'access point ha perso la connettività con il controller o se è stato eventualmente spostato in un altro controller.
L'output fornisce il numero totale di access point dai quali il controller ha ricevuto richieste di individuazione, quindi indica se tali access point sono attualmente uniti al controller o meno.
(Cisco Controller) > show ap join stats summary all Number of APs................................. 3 00:0b:85:1b:7c:b0............................. Joined 00:12:44:bb:25:d0............................. Joined 00:13:19:31:9c:e0............................. Not joined
Dopo aver ottenuto l'indirizzo MAC dell'access point non collegato, utilizzare il riepilogo degli stati di join show ap <mac addr> per individuare l'ultimo join e il motivo dell'errore.
(Cisco Controller) >show ap join stats summary 00:14:f2:63:12:50 Is the AP currently connected to controller............. Yes Time at which the AP joined this controller last time... Jan 24 12:21:32.414 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
Per informazioni dettagliate sulle richieste di individuazione, join e configurazione, utilizzare il comando show ap join stats detail <mac-address> . Questo comando indica anche se il controller vede o meno solo una richiesta di individuazione dall'access point ma non una richiesta di join.
(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
Esempio 1
In questo caso, l'ora sul controller non è corretta. L'errore indica che il payload del certificato AP non è valido. Questo errore si è verificato perché l'ora sul controller non rientra nell'intervallo di validità dei certificati. Verificare che il comando show time indichi l'ora corretta. Si noti il valore temporale del 6 marzo 1993 nell'output sottostante. In questo punto si avvia l'orologio per il controller senza NTP configurato.
Le tre fasi del report statistico di join AP con indicatori di data e ora sono la fase di individuazione, join e configurazione. Controllare il riepilogo dell'ultimo errore sul motivo per cui l'access point non è riuscito ad unirsi o a disconnettersi.
(Cisco Controller) >show ap join stats detailed 00:14:1b:5a:40:10 Discovery phase statistics - Discovery requests received........................... 2 - Successful discovery responses sent................... 1 - Unsuccessful discovery request processing............. 2113123 - Reason for last unsuccessful discovery attempt........ Discovery request received on unsupported VLAN - Time at last successful discovery attempt............. Mar 06 19:03:50.779 - Time at last unsuccessful discovery attempt........... Mar 06 19:03:50.782 Join phase statistics - Join requests received................................ 1 - Successful join responses sent........................ 0 - Unsuccessful join request processing.................. 1 - Reason for last unsuccessful join attempt............. Certificate payload in join request contains invalid certificate - Time at last successful join attempt.................. Not applicable - Time at last unsuccessful join attempt................ Mar 06 19:04:00.810 Configuration phase statistics - Configuration requests received....................... 0 - Successful configuration responses sent............... 0 - Unsuccessful configuration request processing......... 0 - Reason for last unsuccessful configuration attempt.... Not applicable - Time at last successful configuration attempt......... Not applicable - 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................. Not applicable Last join error summary - Type of error that occurred last...................... Lwapp join request rejected - Reason for error that occurred last................... Certificate payload in join request contains invalid certificate - Time at which the last join error occurred............ Mar 06 19:04:00.810
Esempio 2
In questo caso, l'access point invia la richiesta di rilevamento su una VLAN diversa dalla VLAN dell'indirizzo IP di gestione. Il controller rifiuta tutte le richieste di individuazione non ricevute nella subnet dell'interfaccia di gestione.
(Cisco Controller) >show ap join stats detailed 00:14:1b:5a:40:10 Discovery phase statistics - Discovery requests received........................... 10 - Successful discovery responses sent................... 5 - Unsuccessful discovery request processing............. 2113123 - Reason for last unsuccessful discovery attempt........ Discovery request received on unsupported VLAN - Time at last successful discovery attempt............. Jan 30 14:30:12.284 - Time at last unsuccessful discovery attempt........... Jan 30 14:30:12.288 Join phase statistics - Join requests received................................ 4 - Successful join responses sent........................ 0 - Unsuccessful join request processing.................. 4 - Reason for last unsuccessful join attempt............. Certificate payload in join request contains invalid certificate - Time at last successful join attempt.................. Not applicable - Time at last unsuccessful join attempt................ Mar 06 19:19:03.345 Configuration phase statistics - Configuration requests received....................... 0 - Successful configuration responses sent............... 0 - Unsuccessful configuration request processing......... 0 - Reason for last unsuccessful configuration attempt.... Not applicable - Time at last successful configuration attempt......... Not applicable - 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................. Not applicable Last join error summary - Type of error that occurred last...................... Failed to send Lwapp discovery response - Reason for error that occurred last................... Discovery request received on unsupported VLAN - Time at which the last join error occurred............ Jan 30 14:30:12.288 (Cisco Controller) >
Esempio 3
In questo caso, l'access point è stato spostato dal controller al controller primario.
Nota: l'errore può essere generato per più motivi, uno dei quali è un'interruzione della rete.
(Cisco Controller) >show ap join stats detailed 00:14:1b:5a:40:10
Discovery phase statistics
- Discovery requests received........................... 23
- Successful discovery responses sent................... 23
- Unsuccessful discovery request processing............. 0
- Reason for last unsuccessful discovery attempt........
Not applicable
- Time at last successful discovery attempt.............
Jan 30 14:39:38.526
- Time at last unsuccessful discovery attempt...........
Not applicable
Join phase statistics
- Join requests received................................ 21
- Successful join responses sent........................ 21
- Unsuccessful join request processing.................. 0
- Reason for last unsuccessful join attempt.............
Not applicable
- Time at last successful join attempt..................
Jan 30 14:39:07.085
- Time at last unsuccessful join attempt................
Not applicable
Configuration phase statistics
- Configuration requests received....................... 21
- Successful configuration responses sent............... 21
- Unsuccessful configuration request processing......... 0
- Reason for last unsuccessful configuration attempt....
Not applicable
- Time at last successful configuration attempt.........
Jan 30 14:39:09.481
- 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 30 14:40:15.451
Esempio 4
In questo caso, il certificato autofirmato (SSC) dell'access point non è corretto sul controller. Il controller controlla sempre il proprio database locale prima di inoltrare la richiesta a un server radius definito. Di conseguenza, l'errore di autorizzazione RADIUS in sospeso per AP viene visualizzato quando il controller non trova il SSC localmente.
(Cisco Controller) >show ap join stats detailed 00:13:5f:fa:88:50 Discovery phase statistics - Discovery requests received........................... 2 - Successful discovery responses sent................... 1 - Unsuccessful discovery request processing............. 2113123 - Reason for last unsuccessful discovery attempt........ Discovery request received on unsupported VLAN - Time at last successful discovery attempt............. Jan 30 14:58:58.070 - Time at last unsuccessful discovery attempt........... Jan 30 14:58:58.071 Join phase statistics - Join requests received................................ 1 - Successful join responses sent........................ 0 - Unsuccessful join request processing.................. 1 - Reason for last unsuccessful join attempt............. RADIUS authorization is pending for the AP - Time at last successful join attempt.................. Not applicable - Time at last unsuccessful join attempt................ Jan 30 14:59:13.111 Configuration phase statistics - Configuration requests received....................... 0 - Successful configuration responses sent............... 0 - Unsuccessful configuration request processing......... 0 - Reason for last unsuccessful configuration attempt.... Not applicable - Time at last successful configuration attempt......... Not applicable - 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................. Radius authorization of the AP has failed Last join error summary - Type of error that occurred last...................... AP got or has been disconnected - Reason for error that occurred last................... Radius authorization of the AP has failed - Time at which the last join error occurred............ Jan 30 14:59:13.117 (Cisco Controller) >
Esempio 5
(Cisco Controller) >show ap join stats detailed 0026cb8168c0 Discovery phase statistics - Discovery requests received.............................. 202 - Successful discovery responses sent...................... 0 - Unsuccessful discovery request processing................ 0 - Reason for last unsuccessful discovery attempt........... Not applicable - Time at last successful discovery attempt................ Not applicable - Time at last unsuccessful discovery attempt.............. Not applicable Join phase statistics - Join requests received................................... 122 - Successful join responses sent........................... 0 - Unsuccessful join request processing..................... 0 - Reason for last unsuccessful join attempt................ Not applicable - Time at last successful join attempt..................... Not applicable - Time at last unsuccessful join attempt................... Not applicable Configuration phase statistics - Configuration requests received.......................... 115 - Successful configuration responses sent.................. 0 - Unsuccessful configuration request processing............ 0 - Reason for last unsuccessful configuration attempt....... Not applicable --More-- or (q)uit - Time at last successful configuration attempt............ Not applicable - 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.................... Image data request received from an unsupported AP Last join error summary - Type of error that occurred last......................... AP got or has been disconnected - Reason for error that occurred last...................... Image data request received from an unsupported AP - Time at which the last join error occurred............... Feb 16 00:50:16.841
Discovery phase statistics - Discovery requests received.............................. 44 - Successful discovery responses sent...................... 44 - Unsuccessful discovery request processing................ 0 - Reason for last unsuccessful discovery attempt........... Not applicable - Time at last successful discovery attempt................ Feb 26 18:36:24.098 - Time at last unsuccessful discovery attempt.............. Not applicable Join phase statistics - Join requests received................................... 44 - Successful join responses sent........................... 0 - Unsuccessful join request processing..................... 44 - Reason for last unsuccessful join attempt................ Join request receive d from an unsupported AP - Time at last successful join attempt..................... Not applicable - Time at last unsuccessful join attempt................... Feb 26 18:36:39.497 Configuration phase statistics - Configuration requests received.......................... 0 - Successful configuration responses sent.................. 0 - Unsuccessful configuration request processing............ 0 - Reason for last unsuccessful configuration attempt....... Not applicable - Time at last successful configuration attemp--More-- or (q)uit t............ Not applicable - Time at last unsuccessful configuration attempt.......... Not applicable Last AP message decrytion failure details - Reason for last message decryption failure............... Not applicable Last AP disconnect details - Reason for last AP connection failure.................... Not applicable Last join error summary - Type of error that occurred last......................... Lwapp join request r ejected - Reason for error that occurred last...................... Join request receive d from an unsupported AP - Time at which the last join error occurred............... Feb 26 18:36:39.497
Informazioni correlate
Cronologia delle revisioni
| Revisione | Data di pubblicazione | Commenti |
|---|---|---|
3.0 |
11-Apr-2023 |
Aggiorna formattazione. Informazioni tecniche riviste. Certificazione. |
1.0 |
26-Feb-2008 |
Versione iniziale |
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