Downloading A System Image Using Xmodem Or Ymodem - Cisco WS-X6066-SLB-APC - Content Switching Module Software Manual

Chapter 25 Working with System Software Images

Downloading a System Image Using Xmodem or Ymodem

When you need a system image on the switch, but the switch does not have network access and you do
not have a software image on a Flash PC card, you can download an image from a local or remote
computer (such as a PC, UNIX workstation, or Macintosh) through the console port using the Xmodem
or Ymodem protocol.
Xmodem and Ymodem are common protocols used to transfer files and are included in applications such
as Windows 3.1 (TERMINAL.EXE), Windows 95 (HyperTerminal), Windows NT 3.5x
(TERMINAL.EXE), Windows NT 4.0 (HyperTerminal), and Linux UNIX freeware (minicom).
Xmodem and Ymodem downloads are slow: use them only when the switch does not have network
access. You can speed up the transfer by setting the console port speed to 38400 bps.
Xmodem and Ymodem file transfers are performed from the ROM monitor with the following
command:
xmodem [-y] [-c] [-s data-rate]
In the example, the -y option uses the Ymodem protocol; -c provides CRC-16 checksumming; and -s sets
the console port data rate.
See the "ROM Monitor Command-Line Interface" section in the "Command-Line Interfaces"
Note
chapter for more information about the ROM monitor.
The computer from which you transfer the supervisor engine software image must be running terminal
emulation software that supports the Xmodem or Ymodem protocol.
The following procedure shows a file transfer using the Xmodem protocol. To use the Ymodem protocol,
include the -y option with the xmodem command.
A modem connection from the telephone network to your console port introduces security issues that
Caution
you should consider before enabling the connection. For example, remote users can dial into your
modem and access the switch configuration settings.
Caution If you have redundant supervisor engines, you must remove the second (redundant) supervisor
engine before you perform this procedure. The image that is downloaded via Xmodem is not saved
to memory; therefore, after the download if you have two supervisor engines installed and attempt
to reboot the active supervisor engine with the downloaded image, the redundant supervisor engine
will take over and synchronize with the active supervisor engine; the downloaded image will not be
booted.
Place a supervisor engine software image on the computer's hard drive. You can download an image
Step 1
from Cisco.com.
Step 2 To download from a local computer, connect the console port (port mode switch in the in position) to a
serial port on the computer, using a null-modem cable. The console port speed must match the speed
configured on the local computer.
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Downloading a System Image Using Xmodem or Ymodem
Catalyst 6000 Family Software Configuration Guide—Releases 6.3 and 6.4
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