do this procedureStep-by-Step Procedure
Attach a terminal or PC with terminal emulation to the console port of the router. Use the following terminal settings:
9600 baud rate
No parity
8 data bits
1 stop bit
No flow control
For additional informaiton on cabling and connecting a terminal to the console port or the AUX port refer to the following documents:
Cabling Guide for Console and AUX Ports on Cisco Routers
Connecting a Terminal to Catalyst 2948G-L3, 4908G-L3, and 4840G Series Switches
Catalyst 8510CSR, and 8540CSR Switches Console Port Pinouts
If you still have access to the router, type show version and record the setting of the configuration register; it is usually 0x2102 or 0x102. Click here to see the output of a show version command.
If you don't have access to the router (because of a lost login or tacacs password), you can safely consider that your configuration register is set to 0x2102.
Using the power switch, turn off the router and then turn it back on.
Important: To simulate step 4 on a Cisco 6400, pull out and then replace the Node Route Processor (NRP) or Node Switch Processor (NSP) card.
Important: To simulate step 4 on a Cisco 6x00 using NI-2, pull out and then replacethe NI-2 card.
Press Break on the terminal keyboard within 60 seconds of the power-up to put the router into ROMMON.
If the break sequence doesn't work, see Possible Key Combinations for Break Sequence During Password Recovery for other key combinations.
Type confreg 0x2142 at the rommon 1> prompt to boot from Flash without loading the configuration.
Type reset at the rommon 2> prompt.
The router reboots but ignores its saved configuration.
Type no after each setup question or press Ctrl-C to skip the initial setup procedure.
Type enable at the Router> prompt.
You'll be in enable mode and see the Router# prompt.
Important: Type configure memory o
