Cisco 2610 Hardware Installation Guide - Page 89

Copying an Image from the Console Using the xmodem Command

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Appendix B Using the ROM Monitor Recovering Cisco IOS Software Images Note The tftpdnld command is not available on the Cisco 2691 router. The recommended method for installing a Cisco IOS image on a Cisco 2691 router is from a CompactFlash memory card loaded in the external CompactFlash memory card slot. See the "Entering Boot Commands" procedure on page B-4. Copying an Image from the Console Using the xmodem Command Description and Options of 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 argument filename specifies the source file containing the Cisco IOS image. Other options include the following: • 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. Console Requirements The console computer (PC) must have the following files to use this procedure: • Terminal emulation application program supporting one of the following file transfer protocols: - Xmodem - Xmodem-CRC - Xmodem-1K - Ymodem • Cisco IOS image file Procedure for the xmodem Command To copy a Cisco IOS image from a console to flash memory, perform the following procedure. Note File transfer from a console is slow and will take many minutes. Step 1 Step 2 Connect a console to the router's console port using the instructions in the "Connecting to a Console Terminal or Modem" section on page 3-20. Power up the router. The power-on self-test diagnostics run and the boot ROM searches for a valid boot image and Cisco IOS image in flash memory. If the boot image and Cisco IOS image are not found, the ROM monitor prompt is displayed: rommon 1> OL-2171-06 Cisco 2600 Series Routers Hardware Installation Guide B-9

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B-9
Cisco 2600 Series Routers Hardware Installation Guide
OL-2171-06
Appendix B
Using the ROM Monitor
Recovering Cisco IOS Software Images
Note
The
tftpdnld
command is not available on the Cisco
2691 router. The recommended method
for installing a Cisco IOS image on a Cisco 2691 router is from a CompactFlash memory
card loaded in the external CompactFlash memory card slot. See the
“Entering Boot
Commands” procedure on page B-4
.
Copying an Image from the Console Using the xmodem Command
Description and Options of 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 argument
filename
specifies the source file containing the Cisco IOS image.
Other options include the following:
•
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.
Console Requirements
The console computer (PC) must have the following files to use this procedure:
•
Terminal emulation application program supporting one of the following file transfer protocols:
–
Xmodem
–
Xmodem–CRC
–
Xmodem–1K
–
Ymodem
•
Cisco IOS image file
Procedure for the xmodem Command
To copy a Cisco IOS image from a console to flash memory, perform the following procedure.
Note
File transfer from a console is slow and will take many minutes.
Step 1
Connect a console to the router’s console port using the instructions in the
“Connecting to a Console
Terminal or Modem” section on page 3-20
.
Step 2
Power up the router. The power-on self-test diagnostics run and the boot ROM searches for a valid boot
image and Cisco IOS image in flash memory. If the boot image and Cisco IOS image are not found, the
ROM monitor prompt is displayed:
rommon 1>