快速业务通道

Cisco路由器口令的恢复(700)

作者 佚名技术 来源 网络技术 浏览 发布时间 2012-07-01
 

This document describes the procedure for performing password recovery on Cisco 750/760 series routers using the NVRAM erase code (750erase.hex or 760erase.hex). Choose the appropriate Terminal Emulation Package (Windows95 and Windows3.1x instruction are included).

Power cycle the router. While it is booting up, press the ESC key a couple of times. This will put the unit into a software load mode. The unit will respond with the following prompts:

Ready to upload new firmware into flash. Baud (1=19.2K, 2=2400, 3=38.4K, 9=9600)?

Select the baud rate for the transfer (in this example 9600 is chosen). The unit will respond with the following prompt.

Begin ascii upload at 8n1/9600 baud.

Start the ascii file transfer of the image, 750erase.hex for the 750 series or 760erase.hex for the 760 series. These files are not interchangeable. This file must be treated as a text file for loading into the unit via the console port. At 9600, the transfer takes approximately 12 minutes. While the transfer is occuring, the LINE LED will be flashing rapidly. When the transfer is complete the unit will respond with the following prompts and then reboot itself:

Firmware transfer successful.

Now writing firmware into FLASH, standby ...

Firmware upload complete.

Erase Version of 750/760 firmware This will erase all configured parameters

ERASING NVRAM...

(reboots itself)

Ready to upload new firmware into flash.

Baud (1=19.2K, 2=2400, 3=38.4K, 9=9600)?

At this point, reload the original software repeating step 2.

Procedure for performing a text/ascii transfer using Windows95 Hyperterminal

Choose Properties from the File Menu

Choose Settings Tab

Choose ASCII Setup Button

Make sure that both "Line Delay" and "Character Delay" are set to zero.

Make sure that "Send line ends with line feeds is check marked".

Click the OK Button on both screens.

Close Hyperterminal and then restart it.

Choose Send Text File... from the Transfer menu.

Locate file (may have to change Files of Type to All Files) and highlight it.

Click the OK Button.

The file is now being transferred to the unit...there may not be any indication that the file is transferring except for the LINE LED on the front of the unit. While the transfer is occuring, the LINE LED will be flashing rapidly on the front of the unit.

Procedure for performing a text/ascii transfer using Windows Terminal

Choose Text Transfers... from the Settings Menu.

Make sure that "Standard Flow Control" is chosen.

Click the OK Button.

Choose Send Text File... from the Transfer Menu.

Locate file (may have to change List Files of Type to All Files) and highlight it.

Make sure that neither Append LF nor Strip LF are check marked.

Click the OK Button.

The file is now being transferred to the unit...there may not be any indication that the file is transferring except for the LINE LED on the front of the unit. While the transfer is occuring, the LINE LED will be flashing rapidly on the front of the unit.

凌众科技专业提供服务器租用、服务器托管、企业邮局、虚拟主机等服务,公司网站:http://www.lingzhong.cn 为了给广大客户了解更多的技术信息,本技术文章收集来源于网络,凌众科技尊重文章作者的版权,如果有涉及你的版权有必要删除你的文章,请和我们联系。以上信息与文章正文是不可分割的一部分,如果您要转载本文章,请保留以上信息,谢谢!

分享到: 更多

Copyright ©1999-2011 厦门凌众科技有限公司 厦门优通互联科技开发有限公司 All rights reserved

地址(ADD):厦门软件园二期望海路63号701E(东南融通旁) 邮编(ZIP):361008

电话:0592-5908028 传真:0592-5908039 咨询信箱:web@lingzhong.cn 咨询OICQ:173723134

《中华人民共和国增值电信业务经营许可证》闽B2-20100024  ICP备案:闽ICP备05037997号