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You try to console into a Cisco router but have unreadable output? Most of the time problem is the speed mismatch between your computer (terminal simulator software) serial port and the router console port.

The idea to fix it is basically match them back. Therefore in general you should try to change baud speed of your terminal emulator software into something that match current baud speed of the router console's baud speed. You may have to do some trial and error until you find the right baud speed.

When the router in question is either 2600 and 3600 series model, you also can reposition the router's jumper. Following is the Cisco link for details.

Cisco 2600 and 3600 Console Baud Reset Jumper

Check out the following thread for discussion.
»2600 issues with Hyperterminal

When your router is neither 2600 nor 3600 series; or not even a router, you might want to implement steps on the following FAQ.
»Cisco Forum FAQ »Used wrong config-register and now the router/switch does not boot!


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by aryoba See Profile
last modified: 2016-11-01 13:48:53