某局点分层AC组网，AP无法正常上线故障案例

Central AC是WX5540E，local AC是S5560-EI部署分层AC的组网。

刚开始分层AC无法建立，考虑到S5560-EI用的是无线特性包UWW-R5204，和WX5540E的版本5218P01不是一致的，在WX5540上关闭版本更新功能。

#

wlan local-ac name hg model S5560

 serial-id 210235A1FYC17B000022

 firmware-upgrade disable

#

之后，分层AC能正常建立，S5560-EI能注册到WX5540E上，但是AP无法上线

<H3C>display wlan local-ac all

Total number of local ACs: 1

Total number of connected local ACs: 0

                                Local AC Information

 State : I = Idle,      J  = Join,       JA = JoinAck,    IL = ImageLoad

         C = Config,    DC = DataCheck,  R  = Run

AC name     ACID   State    Model           Serial ID

hg           5     R/M     S5560           210235A1FYxxxxxx0022#

wlan ap sc1 model WA5320

 serial-id 219801A0YDxxxxxx03C7

control-address enable

 control-address ip 200.0.0.1

 vlan 1

 radio 1

  radio enable

  service-template hg

 radio 2

  radio enable

  service-template hg

 gigabitethernet 1

 gigabitethernet 2

#

Sync AP licenses: 0

                                 AP information

 State : I = Idle,      J  = Join,       JA = JoinAck,    IL = ImageLoad

         C = Config,    DC = DataCheck,  R  = Run,   M = Master,  B = Backup

AP name         APID  State  Model           Serial ID

sc1              6     IL     WA5320          219801A0YDxxxxxx03C7

查看debug

.

*Aug 22 11:15:37:942 2019 5560ei CWS/7/FSM: Enter Join state.

*Aug 22 11:15:37:946 2019 5560ei CWS/7/RCV_PKT: Received image data request with SeqNum 2 from AP at 200.0.0.2:28160.

*Aug 22 11:15:37:946 2019 5560ei CWS/7/RCV_PKT: Received image data request from AP at 200.0.0.2:28160, Length=42.

 00 10 02 00 00 00 00 00 00 00 00 0F 02 00 1D 00

 00 19 00 12 00 00 63 A2 00 02 00 0A 77 61 35 33

 30 30 2E 69 70 65 00 1B 00 00

.

*Aug 22 11:15:37:946 2019 5560ei CWS/7/FSM: Enter Image Download state.

*Aug 22 11:15:37:946 2019 5560ei CWS/7/EVENT: Failed to get image file from the ram path. Failed to download image file.//下载版本失败

*Aug 22 11:15:37:948 2019 5560ei CWS/7/ERROR: /mnt/slot1#flash:/wa5300.ipe version: R2218P01; APDB version: E2204.

 *Aug 22 11:15:37:948 2019 5560ei CWS/7/ERROR: Failed to download image file wa5300.ipe for the AP. AP version is not equal. //报错AP和AC的版本不匹配

*Aug 22 11:15:37:948 2019 5560ei CWS/7/ERROR: Failed to process image data request.

*Aug 22 11:15:37:949 2019 5560ei CWS/7/FSM: [Ap ID: 2] Image Download -> Idle.

*Aug 22 11:15:37:949 2019 5560ei CWS/7/EVENT: CAPWAP tunnel to AP 219801A0YDxxxxxx03C7 went down:

%Aug 22 11:15:38:487 2019 5560ei CWC/6/CWC_RUN_DOWNLOAD_START: [Port 0] Started to download the file wa5300.ipe through the CAPWAP tunnel to AC 30.0.0.1.

*Aug 22 11:15:40:944 2019 5560ei CWS/7/ERROR: Failed to match image data request with SeqNum 2 from AP at 200.0.0.2:110

*Aug 22 11:15:43:944 2019 5560ei CWS/7/ERROR: Failed to match image data request with SeqNum 2 from AP at 200.0.0.2:110

*Aug 22 11:15:53:954 2019 5560ei CWS/7/RCV_PKT: Received discovery request with SeqNum 0 from AP at 200.0.0.2:28162.

*Aug 22 11:15:53:954 2019 5560ei CWS/7/RCV_PKT: Received discovery request from AP at 200.0.0.2:28162, Length=157.

 00 10 02 00 00 00 00 00 00 00 00 01 00 00 90 00

 00 14 00 01 00 00 26 00 39 00 00 63 A2 00 00 00

 06 57 41 35 33 32 30 00 01 00 14 32 31 39 38 30

 31 41 30 59 44 38 31 39 35 45 30 30 33 43 37 00

 03 00 05 56 65 72 2E 41 00 04 00 06 4C E9 E4 F4

 EE 80 00 27 00 2B 04 04 01 01 00 00 00 00 63 A2

 00 00 00 01 42 00 00 63 A2 00 01 00 08 52 32 32

 31 38 50 30 31 00 00 63 A2 00 02 00 04 37 2E 31

 31 00 29 00 01 0E 00 2C 00 01 02 04 18 00 05 01

 00 00 00 0A 04 18 00 05 02 00 00 00 6D

在WX5540E上[H3C-wlan-ap-sc1]firmware-upgrade disable关闭版本升级后AP正常上线。

原因是分层AC的组网中，如果local AC是融合AC特性包，由于AP和AC的版本并不是一致的版本，即AP的版本文件只有一个，而AC的特性包有多个。如果开启版本更新会导致AP比较自己的版本和AC版本不一致后再次向融合AC请求版本。

所以这种组网下，先正常添加AP使得AP从local AC中获取版本，然后再关闭版本更新的功能使得AP上线。