管理IOS镜像：备份IOS镜像1.首先要知道IOS存放位置：flash文件Router#showflash:Systemflashdi
rectory:FileLengthName/status333591768c1841-advipservicesk9-m
z.124-15.T1.bin2.备份：把IOS文件备份到TFTP服务器步骤：保证路由器到TFTP服务器可以正常访问给R0路由器配
置IP地址：Router0(config-if)#ipaddress192.168.1.1255.255.255.0Rout
er0(config-if)#noshutRouter0(config-if)#exit给TFTP服务器配IP地址，然后拼一下。
（.为ping不同！为可以ping通对端）Router0#ping192.168.1.100Typeescapesequ
encetoabort.Sending5,100-byteICMPEchosto192.168.1.100,ti
meoutis2seconds:.!!!!Successrateis80percent(4/5),round-
tripmin/avg/max=0/0/1ms步骤：使用复制命令备份Router0#copyflash:tftp:R
0#copyflash:tftp:Sourcefilename[]?c1841-advipservicesk9-mz.1
24-15.T1.bin(指定源文件名)Addressornameofremotehost[]?192.168.1
.100（指定远端服务器IP地址）Destinationfilename[c1841-advipservicesk9-mz.
124-15.T1.bin]?2015.bin（存放到远端服务器的文件名，这个文件名可以修改，但是建议以.bin格式结尾。）
Writingc1841-advipservicesk9-mz.124-15.T1.bin...!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![OK-33
591768bytes]33591768bytescopiedin1.25secs(2821597bytes/se
c)验证TFTP服务器上是否存在备份文件二、恢复IOS文件1.首先删除flash文件。（不小心删除flash后，不要重启路由器）R
outer0#deleteflash:R0#deleteflash:Deletefilename[]?c1841-advi
pservicesk9-mz.124-15.T1.bin——（指定源文件名）Deleteflash:/c1841-advip
servicesk9-mz.124-15.T1.bin?[confirm]——（确认删除）删除后验证是否成功删除：（已经没有了
c1841-advipservicesk9-mz.124-15.T1.bin文件。）R0#showflash:Systemfl
ashdirectory:FileLengthName/status228282sigdef-category.xml1
227537sigdef-default.xml[255819bytesused,63760565available,
64016384total]63488KbytesofprocessorboardSystemflash(Rea
d/Write)2.保证路由器到TFTP服务器可以正常访问。(详细步骤上面有讲)3.使用步骤：使用复制命令备份R0#copyt
ftp:flash:Addressornameofremotehost[]?192.168.1.100（指定远端
服务器IP）Sourcefilename[]?2015.bin（指定远端服务器文件名）Destinationfilena
me[2015.bin]?（这里文件名可以修改，直接回车）Accessingtftp://192.168.1.100/20
15.bin...Loading2015.binfrom192.168.1.100:!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![OK-3
3591768bytes]33591768bytescopiedin1.609secs(2192042bytes/
sec)4.验证：R0#showflashSystemflashdirectory:FileLengthName/sta
tus4335917682015.bin——（flash恢复成功）228282sigdef-category.xml1
227537sigdef-default.xml[33847587bytesused,30168797available
,64016384total]63488KbytesofprocessorboardSystemflash(Re
ad/Write)5.使用命令保存配置并重启R0#copyrunning-configstartup-configDestinationfilename[startup-config]?Buildingconfiguration...[OK]R0#reload——（重启路由）Proceedwithreload?[confirm] |
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