故障排除为何无线接入点无法加入无线控制器
简介
本文档提供有关无线控制器版本4.2.61.0中show ap join stats命令的信并演示了如何有效地使用它们。有关解决一个无线接入点无法加入无线控制器的详细信息，请参阅轻型无线接入点无法加入无线控制器的故障排除一文。如果无线接入点不发送加入到无线控制器的请求，可以在无线接入点上进行故障排除。三轮车驾驶证科目一考试试题
此故障排除文档适用于版本4.2.61到7.2.103的所有无线控制器。
输出的在背景资料和故障排除算法部分之后我们还列举了无线控制器上发生的不同错误的几个例子。
先决条件
要求
本文档没有具体要求。
渔父屈原组件使用
本文件并不限于特定的软件和硬件版本。
本文档中的资料是从一个特定实验室环境中的设备上生成的。本文档中使用的所有设备以缺省（默认）配置开始配置。如果您的网络是正在使用的生产系统，请确保您了解所有命令带来的潜在影响。
背景信息
无线控制器版本4.2.61.0开始，无线控制器保持跟踪所有的无线接入点发送的发现请求和已经对哪些无线接入点发送一个发现答复。它还跟踪尝试加入无线控制器的无线接入点的成功状态。无线控制器上有2个新的CLI（通过控制台或SSH）命令来帮助解决为什么无线接入点无法加入无线控制器：
Show ap join stats summary [all | AP_Mac_Address]
Show ap join stats detailed AP_Mac_Address
故障诊断算法
基础的英语
使用show ap join stats summary all命令来查看哪个无线接入点没有加入无线控制器。一旦无线控制器收到一个无线接入点的发现请求，该无线接入点立即被插入到show ap join stats列表中。
注：无线控制器不会将无线接入点从列表中删除，直到无线控制器重新启动。在某些情况下，失败加入的无线接入点尝试时间超过一天或完全脱机。使用show ap join stats detail命令找出从无线接入点
发送出来的最后的发现请求和最后的加入请求，以确定无线接入点是否失去了连接或者可能转移到另一个无线控制器。
输出给出无线控制器已收到的所有发出发现请求的无线接入点总数，然后列出这些无线接入点当前是否加入到无线控制器。
(Cisco Controller) >show ap join stats summary all
Number of APs (3)
00:0b:85:1b: Joined
00:12:44:bb: Joined
00:13:19:31: Not joined
一旦你了解到未加入无线接入点使用的MAC地址，使用show ap join stats summary <mac addr>显示最后加入和失败原因。
(Cisco Controller) >show ap join stats summary 00:14:f2:63:12:50
Is the AP currently connected Yes
Time at which the AP joined this controller Jan 24 12:21:32.414
Type of error that AP got or has been disconnected
Reason for error that Timed out while waiting for ECHO respon from the AP
Time at which the last join Jan 24 12:21:14.751
如果你想了解发现请求、加入请求和配置要求的详细信息，使用show ap join stats detail <mac-address>命令。此命令还将显示无线控制器是否只看到从无线接入点发出了发现请求而没有看到加入请求。
(Cisco Controller) >show ap join stats detail 00:14:f2:63:12:50
Discovery pha statistics
- Discovery requests received (2)
- Successful discovery respons nt (2)
- Unsuccessful discovery request processing 0
- Reason for last unsuccessful Not applicable
- Time at last successful Jan 24 12:21:20.547
- Time at last unsuccessful Not applicable
Join pha statistics
- Join requests received (2)
- Successful join respons nt (2)
- Unsuccessful join request processing 0
- Reason for last unsuccessful Not applicable
- Time at last successful Jan 24 12:21:30.669
- Time at last unsuccessful . Not applicable
Configuration pha statistics
- Configuration requests received (2)
- Successful configuration respons nt (2)
- Unsuccessful configuration request processing 0
- Reason for last unsuccessful Not applicable
- Successful Jan 24 12:21:32.414
- Time at last unsuccessful Not applicable
Last AP message decryption failure details
- Reason for last message Not applicable
请领导吃饭
Last AP disconnect details
- Reason for last AP Timed out while waiting for ECHO respon from the AP
Last join error summary
- Type of error that AP got or has been disconnected
- Reason for error that Timed out while waiting for ECHO respon from the AP - Time at which the last join Jan 24 12:21:14.751
例子1
在这种情况下，无线控制器上的时间是不正确的。该错误表明，无线接入点证书的有效载荷是无效的。发生此错误是因为无线控制器上的时间与证书的有效性时间间隔不一致。通过show time命令指示正确的时间。注意：下面输出中的时间值为MAR 6 1993。这是没有配置NTP的无线控制器的时钟开始时间。
无线接入点连接统计报告的三个阶段随着时间的推移为：发现，注册和配置阶段。检查最后一个错误摘要部分获取无线接入点无法加入或断开连接的原因。
(Cisco Controller) >show ap join stats detailed 00:14:1b:5a:40:10
Discovery pha statistics
增值税率
- Discovery requests received (2)
- Successful discovery respons nt (1)
- Unsuccessful discovery request processing (2113123)
- Reason for last unsuccessful
Discovery request received on unsupported VLAN
- Time at last successful Mar 06 19:03:50.779
- Time at last unsuccessful Mar 06 19:03:50.782
Join pha statistics
- Join requests received (1)
- Successful join respons nt 0
- Unsuccessful join request processing (1)
-
Reason for last unsuccessful
Certificate payload in join request contains
生日请贴
invalid certificate
- Time at last successful Not applicable
- Time at last unsuccessful . Mar 06 19:04:00.810
Configuration pha statistics
- Configuration requests received 0
- Successful configuration respons nt 0
- Unsuccessful configuration request processing 0
- Reason for last unsuccessful Not applicable
六州歌头
- Time at last successful . Not applicable
-
Time at last unsuccessful Not applicable
Last AP message decryption failure details
- Reason for last message Not applicable
Last AP disconnect details
- Reason for last AP Not applicable
Last join error summary
- Type of error that Lwapp join request rejected
- Reason for error that
Certificate payload in join request contains invalid
certificate
- Time at which the last join Mar 06 19:04:00.810
例子2
在这种情况下，无线接入点发送的发现请求通过非管理IP地址所在的VLAN接收到。无线控制器拒绝所有从非管理接口子网接收到的发现请求。
(Cisco Controller) >show ap join stats detailed 00:14:1b:5a:40:10
Discovery pha statistics
- Discovery requests received (10)
- Successful discovery respons nt (5)
- Unsuccessful discovery request processing (2113123)
- Reason for last unsuccessful
Discovery request received on unsupported VLAN
- Time at last successful Jan 30 14:30:12.284
- Time at last unsuccessful Jan 30 14:30:12.288
Join pha statistics
- Join requests received (4)
- Successful join respons nt 0
- Unsuccessful join request processing (4)
- Reason for last unsuccessful
Certificate payload in join request contains invalid
certificate
- Time at last successful Not applicable
- Time at last unsuccessful . Mar 06 19:19:03.345
Configuration pha statistics
简笔画垃圾桶- Configuration requests received 0
-
Successful configuration respons nt 0
- Unsuccessful configuration request processing 0
- Reason for last unsuccessful Not applicable
- Time at last successful . Not applicable
