1. Use the Cisco router Debug cable to connect the router's console interface and the computer's serial port, turn on the router after powering on, and then 1. In Windows XP, initial debugging via the HyperTerminal logon router, as shown in network topology 7-8
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Figure 7-8 Network topology
2. Restore the router's factory settings
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3. Modify the Privileged password
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4. Copy the router's configuration file to local via the TFTP server
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5. Upgrading the operating system
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This article is from the "Wu Shihui" blog, make sure to keep this source http://wushihui.blog.51cto.com/9976141/1622608
Debugging a Cisco Enterprise-class Router