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5-11
Cisco 7201 Installation and Configuration Guide
OL-11364-04
Chapter 5 Troubleshooting Initial Startup Problems
ROMmon Prompt: rommon >
Last reset from power-on
1 FastEthernet interface
4 Gigabit Ethernet interfaces
2045K bytes of NVRAM.
250880K bytes of ATA PCMCIA card at slot 0 (Sector size 512 bytes).
65536K bytes of Flash internal SIMM (Sector size 512K).
Uncompressed configuration from 1000 bytes to 1703 bytes
Press RETURN to get started!
7201>
b.
If the flash file system does not have a valid Cisco IOS image, enter confreg 0x1, followed by reset.
rommon 2 >
confreg 0x1
You must reset or power cycle for new config to take effect
rommon 3 >
reset
System Bootstrap, Version 12.4(12.2r)T, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2006 by cisco Systems, Inc.
<startup boot messages removed for brevity>
7201_devtest2(boot)>
After entering these commands, follow the instructions in the
“ROMmon Prompt: rommon >” section on
page 5-10
to download a valid Cisco IOS image.
Step 3
(Optional) Set the configuration register using the config-register command. If you want the router to
be in ROMmon mode after a reboot, this step is not necessary. To set the configuration register to reboot
to the router prompt, enter the config-register 0x2 command.
7201#
configure terminal
7201(config)#
config-register 0x2
See
Appendix C, “Configuration Register Information,”
for additional information regarding
configuration register settings.
Step 4
(Optional) Save the configuration using the copy running-config startup-config command. This step is
especially important if you wish to save the configuration register settings.
Complete Boot Prompt and ROMmon Prompt Example
In the following example, a Cisco 7201 router starting in boot mode downloads a Cisco IOS image to
Flash memory, reboots into ROMmon mode, and boots the Cisco IOS image from ROMmon mode to
enter the Cisco IOS CLI.
7201(boot)#
ping 2.0.0.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.0.0.2, timeout is 2 seconds: