某局点WX3520H-F 分层AC local AC 故障又恢复后AP无法回切

WX3520H-F  WX2510H  Version 7.1.064, Release 5446P06

local-ac不通时，ap可以垂直备份到中心ac，但是当local-ac重新上线后，ap不能自动回切到local-ac，ap组下有开启switch-back enable功能，但是没生效。

正常状态时，AP在中心ac上上线，下发local-ac地址注册到local-ac上。

当断开local-ac的网络连接后，AP检测到与local-ac不通后，会重新和中心AC建立连接。

当重新链接local-ac后，ap不会回切到local-ac, ap一直在中心ac上面，只有重启AP，才能够恢复之前的状态。

查看配置，AP视图下配置了回切命令

%Oct 28 09:52:57:150 2021 WX2510H CWC/4/CWC_LOCAL_AC_DOWN: CAPWAP tunnel to central AC 172.16.x.x went down. Reason: Neighbor dead timer expired.

%Oct 28 09:52:57:150 2021 WX2510H APMGR/6/APMGR_LOCAL_AC_OFFLINE: Local AC FitAP went offline. State changed to Idle.

%Oct 28 09:53:22:160 2021 WX2510H CWS/4/CWS_AP_DOWN: CAPWAP tunnel to AP xxx went down. Reason: Failed to retransmit message.

%Oct 28 09:53:22:161 2021 WX2510H CWS/4/CWS_AP_DOWN: CAPWAP tunnel to AP xxx went down. Reason: Failed to retransmit message.

%Oct 28 09:53:22:162 2021 WX2510H CWS/4/CWS_AP_DOWN: CAPWAP tunnel to AP xxx went down. Reason: Failed to retransmit message.

%Oct 28 09:53:22:165 2021 WX2510H STAMGR/6/STAMGR_CLIENT_OFFLINE: Client x-x-3b9e went offline from BSS xxx with SSID h3c-test on AP x-x-4480 Radio ID 1. State changed to Unauth. Reason: AP down.

%Oct 28 09:53:22:167 2021 WX2510H APMGR/6/APMGR_AP_OFFLINE: AP xxx went offline. State changed to Idle.

……

%Oct 28 09:53:34:491 2021 WX2510H IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/1 changed to up.

%Oct 28 09:53:37:103 2021 WX2510H CWC/6/CWC_LOCAL_AC_UP: CAPWAP tunnel to central AC 172.16.202.2 went up.

%Oct 28 10:01:49:212 2021 WX2510H SHELL/4/SHELL_CMD_MATCHFAIL: -User=admin-IPAddr=172.16.x.x; Command dis dia in view system failed to be matched.

%Oct 28 10:01:52:363 2021 WX2510H SHELL/6/SHELL_CMD: -Line=vty1-IPAddr=172.16.x.x User=admin; Command is dis diagnostic-information

%Oct 28 10:01:52:960 2021 WX2510H SHELL/6/SHELL_CMD_CONFIRM: Confirm option of command dis diagnostic-information is no.

增加配置，在central-ac上的AP视图或者AP组视图操作

backup-ac ip 配置成local-ac的IP

分层AC备份基于两条命令backup ac 和 switch-back 都需配置，都基于AP组或AP视图

如果需要对center ac进行备份，则在local AC视图使用backup-ac命令。

1.1  分层AC配置命令

1.1.1  backup-ac

backup-ac命令用来在双链路模式下配置备份Central AC的IP地址。

undo backup-ac命令用来删除备份Central AC的IP地址。

【命令】

backup-ac { ip ipv4-address | ipv6 ipv6-address }

undo backup-ac { ip | ipv6 }

【缺省情况】

未配置备份Central AC的IP地址。

【视图】

Local AC视图

【缺省用户角色】

network-admin

【参数】

ip ip-address：备份Central AC的IPv4地址。

ipv6 ipv6-address：备份Central AC的IPv6地址。

【使用指导】

仅Central AC支持本功能。

最多只能配置一个备份Central AC的IPv4地址和一个IPv6地址。

若已经建立了备份隧道，删除备份Central AC的IP地址会导致备份隧道连接断开。

【举例】

# 配置Local AC的备份Central AC的IPv4地址。

<Sysname> system-view

[Sysname] wlan local-ac name bac

[Sysname-wlan-local-ac-bac] backup-ac ip 192.168.1.1