因客户有一台H3C的WA4320X无线AP是有胖、瘦切换的功能，但在出厂时默认为瘦模式，无线AP上并没有两种模式的切换开关，打电话给厂家说是刷新固件才能支持为胖模式。于是我使用串口线连接AP上的console口进行调试。
1、查看一下无线AP当前的配置，发现无IP地址：
[WA4320X]dis cur
#
version 5.20, Release 1508P11
#
sysname WA4320X
#
telnet server enable
#
password-recovery enable
#
vlan 1
#
interface NULL0
#
interface Vlan-interface1
#
interface GigabitEthernet1/0/1
#
interface WLAN-Radio1/0/1
#
interface WLAN-Radio1/0/2
2、手动添加IP地址为192.168.0.50，为传输文件做准备
[WA4320X]int vlan 1
[WA4320X-Vlan-interface1]ip address 192.168.0.50 24
[WA4320X-Vlan-interface1]qu
3、在电脑上打开3CD服务器：
4、设备好本机的IP地址和无线AP同一网段，使用网线连接AP的GE1。
5、删除AP上的瘦版本
<WA4320X>delete /unreserved wa4300_fit.bin
The contents cannot be restored!!! Delete flash:/wa4300_fit.bin?[Y/N]:y
Deleting a file permanently will take a long time. Please wait...
%Apr 26 12:03:25:284 2000 WA4320X WMSH/6/WMESH_EXIT_ZERO_CFG_STATE: The device has exited zero configuration state.
%Delete file flash:/wa4300_fit.bin...Done.
6、把要刷新的固件文件改名为wa4300_fat.bin，并放到3CDaemon目录下
7、把胖版本传到AP上，并用它dir查看版本已经在AP上：
<WA4320X>tftp 192.168.0.51 get wa4300_fat.bin
File will be transferred in binary mode
Downloading file from remote TFTP server, please wait...\
%Apr 26 12:06:30:290 2000 WA4320X WMSH/6/WMESH_ENTER_ZERO_CFG_STATE: The device has entered zero configuration state./
TFTP: 11062272 bytes received in 35 second(s)
File downloaded successfully.
<WA4320X> dir /all
Directory of flash:/
0 -rw- 11062272 Apr 26 2000 12:07:03 wa4300_fat.bin
130688 KB total (118730 KB free)
8、设置下次启动文件，：
<WA4320X>boot-loader file flash:/wa4300_fat.bin
%Apr 26 12:07:55:424 2000 WA4320X WMSH/6/WMESH_EXIT_ZERO_CFG_STATE: The device has exited zero configuration state.
Verifying boot file ......
%Apr 26 12:08:00:868 2000 WA4320X WMSH/6/WMESH_ENTER_ZERO_CFG_STATE: The device has entered zero configuration state.
This command will set the boot file. Continue? [Y/N]:
Before pressing ENTER you must choose 'YES' or 'NO'[Y/N]:
Before pressing ENTER you must choose 'YES' or 'NO'[Y/N]:
Before pressing ENTER you must choose 'YES' or 'NO'[Y/N]:y
The specified file will be used as the boot file at the next reboot on slot 1!
9、使用reboot重启设备，web页面登陆http://192.168.0.50,可以登陆表示胖模式刷新成功。
原文地址：http://blog.51cto.com/lijie1977/2121554