CISCO IOS升级详细步骤

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1、一、以3750为例：（适用于大部分接入层网络设备,TFTP最好使用tftp32，可以支持大文件）1、查看3750IOS信息WH-KJY-HJ-B16-3750-01#shflashDirectoryofflash:/2-rwx1036Feb7201213:39:20+08:00vlan.dat3-rwx5Oct25201216:11:52+08:00private-config.text5-rwx7691Oct25201216:11:52+08:00config.text6drwx192Mar1199308:07:03+08:00c3750-ip

2、services-mz.122-35.SE515998976bytestotal(5480960bytesfree)2、由于flash空间不够无法导入新版本的IOS，所以只能删除旧的IOS版本WH-KJY-HJ-B16-3750-01#cdflash:/c3750-ipservices-mz.122-35.SE5//进入旧的目录下删除WH-KJY-HJ-B16-3750-01#dirDirectoryofflash:/c3750-ipservices-mz.122-35.SE5/7-rwx8054867Mar1199308:05:34+08:00

3、c3750-ipservices-mz.122-35.SE5.bin8drwx4224Mar1199308:05:57+08:00html509-rwx616Mar1199308:07:03+08:00info15998976bytestotal(5480960bytesfree)#deleteflash:/c3750-ipservices-mz.122-35.SE5/c3750-ipservices-mz.122-35.SE5.bin//删除旧IOS版本(注意在操作这步前，将之前的IOS备份一份保存，以便出现问题可以回退)Deletefilen

4、ame[/c3750-ipservices-mz.122-35.SE5/c3750-ipservices-mz.122-35.SE5.bin]?Deleteflash:/c3750-ipservices-mz.122-35.SE5/c3750-ipservices-mz.122-35.SE5.bin?[confirm]删除完成后查看flash信息：WH-KJY-HJ-B16-3750-01#shflashDirectoryofflash:/c3750-ipservices-mz.122-35.SE5/8drwx4224Mar1199308:05:

5、57+08:00html509-rwx616Mar1199308:07:03+08:00info15998976bytestotal(13536256bytesfree)3、导入新的IOS#copytftp:c3750-ipservicesk9-mz.122-40.SE.binflash:c3750-ipservicesk9-mz.122-40.SE.bin4、查看新的IOS导入后flash信息WH-KJY-HJ-B16-3750-01#shflashDirectoryofflash:/2-rwx1036Feb7201213:39:20+08:0

6、0vlan.dat3-rwx5Oct25201216:11:52+08:00private-config.text4-rwx9975530Mar5201317:59:01+08:00c3750-ipservicesk9-mz.122-40.SE.bin5-rwx7691Oct25201216:11:52+08:00config.text6drwx128Mar5201317:53:23+08:00c3750-ipservices-mz.122-35.SE5//不带bin后缀这种事目录）15998976bytestotal(3560448bytesf

7、ree)WH-KJY-HJ-B16-3750-01#shbootBOOTpath-list:flash:c3750-ipservices-mz.122-35.SE5/c3750-ipservices-mz.122-35.SE5.binConfigfile:flash:/config.textPrivateConfigfile:flash:/private-config.textEnableBreak:noManualBoot:noHELPERpath-list:Autoupgrade:yesAutoupgradepath:5、更改设备IOS启动顺

8、序，并保存WH-KJY-HJ-B16-3750-0(config)#bootsysflash:/c3750-ipservicesk9-m