1. 路由器密码的恢复.
2600、3600等新系列路由器步骤：
1、启动路由器，60秒内按下ctrl+break键2、rommon>confreg 0x21423、rommon>reset4、router#copy startup-config running-config5、router(config)#no enable secrect //可以删除密码也可以更改,这里为删除6、router(config)#no enable password7、router(config)#config-register 0x21028、router#copy running-config startup9、router#reload
2500系列路由器步骤：
1、启动路由器，60秒内按下ctrl+break键2、>o/r 0x21423、>i其余步骤跟2600、3600一样
2．交换机密码恢复
以2950为例
重启交换机：按MODE键进入到switch:模式 如下
C2950 Boot Loader (C2950-HBOOT-M) Version 12.1(11r)EA1, RELEASE SOFTWARE (fc1)Compiled Mon 22-Jul-02 17:18 by antoninoWS-C2950-24 starting...Base ethernet MAC Address: 00:13:1a:9a:2b:80Xmodem file system is available.
The system has been interrupted prior to initializing theflash filesystem. The following commands will initializethe flash filesystem, and finish loading the operatingsystem software:
flash_init load_helper boot
switch: flash_initInitializing Flash...flashfs[0]: 4 files, 1 directoriesflashfs[0]: 0 orphaned files, 0 orphaned directoriesflashfs[0]: Total bytes: 7741440flashfs[0]: Bytes used: 3090944flashfs[0]: Bytes available: 4650496flashfs[0]: flashfs fsck took 6 seconds....done initializing flash.Boot Sector Filesystem (bs:) installed, fsid: 3Parameter Block Filesystem (pb:) installed, fsid: 4switch: load_helperswitch: dir
List of filesystems currently registered:
flash[0]: (read-write) xmodem[1]: (read-only) null[2]: (read-write) bs[3]: (read-only)
switch: dir flash:Directory of flash:/
2 -rwx 736 <date> vlan.dat3 -rwx 3086336 <date> c2950-i6q4l2-mz.121-22.EA2.bin5 -rwx 1558 <date> config.text／／交换机启动时应用的配置6 -rwx 5 <date> private-config.text
4650496 bytes available (3090944 bytes used)switch: rename flash:config.text flash:config-old.txt //重命名config.text switch: reset //重起交换机Are you sure you want to reset the system (y/n)?ySystem resetting...
重起交换机后由于交换机不会再应用配置文件，因为刚才已把配置文件的名字更改。交换机会进入到配置的对话模式。如查
--- System Configuration Dialog ---
Would you like to enter the initial configuration dialog? [yes/no]: nSwitch#dirDirectory of flash:/
2 -rwx 736 Mar 01 1993 00:19:14 +00:00 vlan.dat 3 -rwx 3086336 Jan 01 1970 01:12:26 +00:00 c2950-i6q4l2-mz.121-22.EA2.bin 5 -rwx 1558 Mar 01 1993 02:36:44 +00:00 config-old.txt 6 -rwx 5 Mar 01 1993 02:36:44 +00:00 private-config.text
7741440 bytes total (4650496 bytes free)
Switch#copy config-old.txt running-configDestination filename [running-config]?1558 bytes copied in 1.152 secs (1352 bytes/sec)sw#config tEnter configuration commands, one per line. End with CNTL/Z.sw(config)#line console 0sw(config-line)#no pass cisco ／／清除console口密码sw(config)#no enable secret ／／清除enable密码sw(config)#no enable password ／／清除enable密码sw#write //重新保存
以上密码删除成功，很多情况下你可以不删除，就直接更改就OK了。