Procedures For Recovering Boot And System Images; Using The Xmodem Command; Using The Tftpdnld Command - Cisco 2600 Series Hardware Installation Manual

Procedures for Recovering Boot and System Images

break/abort has effect
console baud: 9600
boot: the ROM Monitor
do you wish to change the configuration? y/n
You must reset or power cycle for new config to take effect
Procedures for Recovering Boot and System Images
If your Cisco 2600 series router experiences difficulties and no longer contains a valid Cisco IOS
software image in Flash memory, you can recover the Cisco IOS image using one of the following ROM
monitor commands:
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The tftpdnld command is not available on the Cisco 2691 router. In addition to the xmodem
Note
command, the router can be booted with a good image loaded in the external compact Flash slot.

Using the xmodem Command

The xmodem command establishes a connection between a console and the router console port for
disaster recovery if both the boot and system images are erased from Flash memory.
xmodem [filename]—Establishes an Xmodem connection between the console and the router. The
optional parameter filename specifies the source file containing the Cisco IOS image.
Other options include the following:
•
•
•
•

Using the tftpdnld Command

The tftpdnld command downloads a Cisco IOS software image from a remote server accessible from an
Ethernet or Token Ring network interface on a Cisco 2600 series router. The tftpdnld command
downloads the Cisco IOS software image into Flash memory using TFTP.
The following software restrictions apply when using the tftpdnld command:
•
Cisco 2600 Series Routers Hardware Installation Guide
C-6
xmodem—Use this command if the computer attached to your console has a terminal emulator that
has Xmodem capability.
tftpdnld—Use this command if you have a TFTP server directly connected to the Ethernet 0 port
or Token Ring 0 port.
c—Use cyclic redundancy check (CRC-16)
y—Use Ymodem transfer protocol
r—Copy the image to dynamic random-access memory (DRAM) for launch
x—Do not launch image on completion of download
Ethernet platform—Only accepts and sends Ethernet V2.0 data packets.
Appendix C
[n]:
Using the ROM Monitor
OL-2171-02