Cisco Systems 4908G-L3, 2948G-L3 manual 3-10, Recovering a System Image Using Xmodem and Ymodem

Chapter 3 Configurations for the Layer 3 Switch Router

Recovering a System Image Using Xmodem and Ymodem

Recovering a System Image Using Xmodem and Ymodem

If you do not have access to a network server and need to download a system image, you can copy an image from a local or remote computer (such as a PC, UNIX workstation, or Macintosh computer) using the Xmodem or Ymodem protocols.

Xmodem and Ymodem are common protocols used for transferring 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, so you should use them only when you do not have access to a network server. You can speed up the transfer by setting the transfer port speed to 57600 bps.

If all local system images are damaged or erased on your Layer 3 switch router, you can perform the file transfer by using the ROM monitor. On the Catalyst 2948G-L3 and the Catalyst 4908G-L3 switch routers, you can perform the file transfer from the ROM monitor over the console port.

Note Perform file transfer from the ROM monitor with either Cisco IOS Release 12.0(7)W5(15a) or later. To verify the ROM monitor version, enter either the Cisco IOS show version command or enter the reset command from ROMMON mode.

Figure 3-1shows a file transfer using the Xmodem or Ymodem protocols. The connection is from either a local or a remote computer to your Layer 3 switch router. You can make the connection using either the COM port on the local computer or using a modem with the remote computer.

Figure 3-1 Transferring a System Image to a Layer 3 Switch Router Using Xmodem and Ymodem Protocols

Catalyst 2948G-L3 or Catalyst 4908G-L3 switch router downloading a Cisco IOS software image from a local or remote PC

Telephone

Modemnetwork

Console

port

Local PC running terminal emulation software and Xmodem and Ymodem protocols

Modem

Remote PC running terminal emulation software and Xmodem and Ymodem protocols

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Catalyst 2948G-L3 and Catalyst 4908G-L3 Switch Router Software Feature and Configuration Guide

3-10 78-10408-03