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1、啟動路由器，在30秒那按ctrl+break，進入rommon模式

System Bootstrap, Version 12.1(3r)T2, RELEASE SOFTWARE (fc1)

Copyright (c) 2000 by cisco Systems, Inc.

C2600 platform with 65536 Kbytes of main memory

PC = 0xfff0ab6c, Vector = 0x500, SP = 0x80004884

monitor: command "boot" aborted due to user interrupt

rommon 1 >

2、然后輸入

rommon 1 > confreg 0x2142

You must reset or power cycle for new config to take effect

rommon 2 > reset

3、路由器會重新啟動

System Bootstrap, Version 12.1(3r)T2, RELEASE SOFTWARE (fc1)

Copyright (c) 2000 by cisco Systems, Inc.

C2600 platform with 65536 Kbytes of main memory

program load complete, entry point: 0x80008000, size: 0x8a7f8c

Self decompressing the image :

中間引導過程忽略。。。。。

--- System Configuration Dialog ---

Would you like to enter the initial configuration dialog? [yes/no]:

4、按ctrl+c

Press RETURN to get started!

Router>

Router>enable

Router#copy startup-config running-config

Destination filename [running-config]?

816 bytes copied in 0.884 secs

router1#

router1#conf t

Enter configuration commands, one per line. End with CNTL/Z.

router1(config)#

router1(config)#enable secret cisco

router1(config)#enable password 12345

router1(config)#line con 0

router1(config-line)#login

router1(config-line)#password cisco

router1(config-line)#exit

router1(config)#line aux 0

router1(config-line)#login

router1(config-line)#password cisco

router1(config-line)#exit

router1(config)#line vty 0 4

router1(config-line)#login

router1(config-line)#password cisco

router1(config-line)#exit

router1(config)#config-register 0x2102

router1(config)#exit

router1#

router1#copy running-config startup-config

Destination filename [startup-config]?

Building configuration...

[OK]

router1#