一、前言

通常情况下，交换机是非常稳定的，但只要是软件就会有bug，所以设备厂家都会提供固件的更新，比如我使用的华三交换机，就出现了一些奇奇怪怪的问题，随即想到升级固件试一下。

二、固件下载

华三交换机固件下载地址在华三官网 首页-支持-文档与软件-软件下载-交换机

官方提供了下载专用的用户名密码

用户名：yx800

密码：01230123

注意：华三交换机的系统固件和BootRom已经放在一块了，一次升级即可全部升级。

注意：不同固件的华三命令稍有不同，若命令无法执行，用问号？可查看详细提示。

我的交换机型号为H3C S5120-28P-SI，能够选择的最新的固件为H3C S5120SI_E-CMW520-R1519P06，下载该型号并解压出

S5120SI_E-CMW520-R1519P06.bin

三、TFTP环境准备

下载3CDaemon汉化版，并配置TFTP服务

配置服务目录

注意：关闭系统防火墙或添加端口

四、交换机清空配置并直连电脑

清空的目的是为了防止有配置兼容问题

<H3C>reset saved-configurationThe saved configuration file will be erased. Are you sure? [Y/N]:yConfiguration file in flash is being cleared.Please wait ... Configuration file is cleared.<H3C>reboot Start to check configuration with next startup configuration file, please wait.........DONE! This command will reboot the device. Current configuration may be lost in next startup if you continue. Continue? [Y/N]:y System is rebooting now.

为交换机配置vlanip与电脑互联，电脑IP为192.168.18.2

<H3C>sysSystem View: return to User View with Ctrl+Z.[H3C]int vlan 1[H3C-Vlan-interface1]ip add 192.168.18.1 24[H3C-Vlan-interface1]ping 192.168.18.2  PING 192.168.18.2: 56  data bytes, press CTRL_C to break    Reply from 192.168.18.2: bytes=56 Sequence=1 ttl=64 time=7 ms    Reply from 192.168.18.2: bytes=56 Sequence=2 ttl=64 time=3 ms    Reply from 192.168.18.2: bytes=56 Sequence=3 ttl=64 time=3 ms    Reply from 192.168.18.2: bytes=56 Sequence=4 ttl=64 time=3 ms  --- 192.168.18.2 ping statistics ---    4 packet(s) transmitted    4 packet(s) received    0.00% packet loss    round-trip min/avg/max = 3/4/7 ms

五、上传固件

空间充裕

[H3C-Vlan-interface1]quit[H3C]quit<H3C>dirDirectory of flash:/   0     -rw-       341  Apr 26 2000 12:10:45   system.xml   1     -rw-  10184320  Jun 29 2010 14:14:25   s5120si-cmw520-r1101p10.bin   2     drw-         -  Apr 26 2000 12:00:02   logfile97920 KB total (81690 KB free)

上传固件

<H3C>tftp 192.168.18.2 get  S5120SI_E-CMW520-R1519P06.bin  File will be transferred in binary mode  Downloading file from remote TFTP server, please wait.../  TFTP: 14877696 bytes received in 118 second(s)  File downloaded successfully.<H3C>dirDirectory of flash:/   0     -rw-  14877696  Apr 26 2000 12:19:55   s5120si_e-cmw520-r1519p06.bin   1     -rw-       341  Apr 26 2000 12:10:45   system.xml   2     -rw-  10184320  Jun 29 2010 14:14:25   s5120si-cmw520-r1101p10.bin   3     drw-         -  Apr 26 2000 12:00:02   logfile97920 KB total (67158 KB free)

六、安装固件

配置新固件为第一启动项

<H3C>boot-loader file flash:/s5120si_e-cmw520-r1519p06.bin main  This command will set the boot file. Continue? [Y/N]:y  The specified file will be used as the main boot file at the next reboot on slot 1!<H3C>reboot Start to check configuration with next startup configuration file, please wait.........DONE! This command will reboot the device. Current configuration may be lost in next startup if you continue. Continue? [Y/N]:y Reboot device by command. System is rebooting now.

自动安装固件，全程等待，直至自动进入系统

Starting......    ************************************************************************    *                                                                      *    *               H3C S5120-28P-SI BOOTROM, Version 119                  *    *                                                                      *    ************************************************************************    Creation Date       : Feb  3 2010    CPU L1 Cache        : 32KB    CPU Clock Speed     : 333MHz    Memory Size         : 128MB    Flash Size          : 128MB    CPLD Version        : 002    PCB Version         : Ver.B    Mac Address         : C4CAD99DD5A6Press Ctrl-B to enter Extended Boot menu...0Starting to get the main applicationfile--flash:/s5120si_e-cmw520-r1519p06.bin!..................................................................................................................The main application file is self-decompressing..........................................................................................................................................................................................................Done!Extend BootWare Version is not equal,updating? (Y/N):Updating extended BootRom...Done!Basic BootWare Version is not equal,updating? (Y/N):Updating Basic BootRom...Done!BootWare updated,System is rebooting now.Starting......Press Ctrl+D to access BASIC BOOT MENUPress Ctrl+T to start memory test*********************************************************************************                                                                              **                    H3C S5120-28P-SI BOOTROM, Version 180                     **                                                                              *********************************************************************************Copyright (c) 2004-2017 New H3C Technologies Co., Ltd.Creation Date       : Aug  9 2017CPU L1 Cache        : 32KBCPU Clock Speed     : 333MHzMemory Size         : 128MBFlash Size          : 128MBCPLD Version        : 002PCB Version         : Ver.BMac Address         : C4CAD99DD5A6the normal and back basic is not equal, update back basic....the normal and back extend is not equal, update back extend....Press Ctrl-B to enter Extended Boot menu...0Starting to get the main application file--flash:/s5120si_e-cmw520-r1519p06.bin!..................................................................................................................The main application file is self-decompressing..........................................................................................................................................................................................................Done!System is starting...Startup configuration file does not exist.It will take a long time to get configuration file, please wait...Press CTRL_C to breakRetrieving configuration file failed!User interface aux0 is available.Press ENTER to get started.<H3C>

七、删除旧固件，并为当前交换机保存配置文件

<H3C>del s5120si-cmw520-r1101p10.binDelete flash:/s5120si-cmw520-r1101p10.bin?[Y/N]:y%Delete file flash:/s5120si-cmw520-r1101p10.bin...Done.<H3C>dirDirectory of flash:/   0     -rw-      1617  Apr 26 2000 12:01:22   startup.cfg   1     -rw-       341  Apr 26 2000 12:10:45   systembak.xml   2     -rw-      7655  Apr 26 2000 12:01:20   config.cwmp   3     -rw-  14877696  Apr 26 2000 12:19:55   s5120si_e-cmw520-r1519p06.bin   4     drw-         -  Apr 26 2000 12:00:02   logfile97920 KB total (67142 KB free)<H3C>saveThe current configuration will be written to the device. Are you sure? [Y/N]:yPlease input the file name(*.cfg)[flash:/startup.cfg](To leave the existing filename unchanged, press the enter key):flash:/startup.cfg exists, overwrite? [Y/N]:y Validating file. Please wait.... Saved the current configuration to mainboard device successfully. Configuration is saved to device successfully.

八、升级完成

如果升级完成后交换机仍有问题，那就扔了吧