對不加入控制器的無線接入點進行故障排除
簡介
本檔案介紹控制器4.2.61.0版中的新show ap join stats命令，並示範如何有效使用它們。
必要條件
需求
本文件沒有特定需求。
採用元件
本文件所述內容不限於特定軟體和硬體版本。
本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路運作中，請確保您瞭解任何指令可能造成的影響。
慣例
如需文件慣例的詳細資訊，請參閱思科技術提示慣例。
背景資訊
本檔案將提供有關控制器4.2.61.0版中的新show ap join stats命令的資訊，並示範如何有效使用它們。如需詳細資訊，請參閱對輕量型存取點不加入無線LAN控制器進行疑難排解，以有效疑難排解存取點(AP)為什麼沒有加入控制器。如果AP沒有向控制器傳送加入，您需要在AP進行故障排除。
本檔案適用於從4.2.61到最新版本7.2.103的所有控制器(WLC)版本。
控制器上發生的幾個不同錯誤的示例輸出均在背景資訊和故障排除演算法部分之後。
在控制器版本4.2.61.0中，控制器現在會跟蹤向其傳送發現請求的所有AP以及向其傳送發現回覆的AP。也會追蹤嘗試加入控制器的AP以及它們是否成功。控制器上有2個新的CLI（控制檯或SSH）命令，可幫助排除AP無法加入控制器的故障：
show ap join stats summary [all | AP_Mac_Address]
show ap join stats detail
排解演算法
使用show ap join stats summary all命令檢視未加入控制器的AP。一旦控制器收到發現請求，AP就會插入show ap join stats清單中。
注意：在控制器重新啟動之前，控制器從不從show ap join stats清單中刪除AP。在某些情況下，失敗的AP嘗試加入已超過一天或完全離線。使用show ap join stats detail命令可查明上次發現請求和上次加入請求是何時從AP傳送的，以確定AP是否已失去與控制器的連線或是否已移動到另一個控制器。
輸出給出了控制器從其中收到發現請求的AP總數，然後列出這些AP當前是否已加入控制器。
(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
當您擁有未加入的AP的MAC地址後，請使用show ap join stats summary <mac addr>來發現上次加入以及失敗的原因。
(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
如果要瞭解有關發現請求、加入請求和配置請求的詳細資訊，請使用命令show ap join stats detail <mac-address>。此命令還指示控制器是否只看到來自AP的發現請求，而沒有看到加入請求。
(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
範例 1
在這種情況下，控制器上的時間不正確。此錯誤表示AP證書負載無效。發生此錯誤是因為控制器上的時間超出了證書的有效時間間隔。確保show time命令指示正確的時間。在下面的輸出中記下1993年3月6日的時間值。這是未設定NTP的控制器時鐘的起始位置。
具有時間戳的AP加入報告統計資訊的三個階段是發現、加入和配置階段。檢查「Last Error Summary（上次錯誤摘要）」，瞭解AP無法加入或斷開連線的原因。
(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
範例 2
在這種情況下，AP會將發現請求傳送到管理IP地址VLAN以外的VLAN上。控制器會拒絕管理介面子網中未收到的所有發現請求。
(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) >
範例 3
在這種情況下，AP從此控制器移動到其主控制器。
註：產生錯誤的原因有多種，其中一個是網路中斷。
(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
範例 4
在這種情況下，AP的自簽名證書(SSC)在控制器上不正確。控制器在將請求轉發到定義的radius伺服器之前，始終檢查其本地資料庫。因此，當控制器在本地未找到SSC時，會顯示RADIUS authorization pends for AP錯誤。
(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) >
範例 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
相關資訊
修訂記錄
| 修訂 | 發佈日期 | 意見 |
|---|---|---|
3.0 |
11-Apr-2023 |
更新格式。已檢視技術資訊。重新認證。 |
1.0 |
26-Feb-2008 |
初始版本 |
意見