3Com 5000 Series Installation Manual page 66

3Com Router 5000 Family
Installation Guide
1:
2:
3:
4:
5:
Enter your choice(1-5):
10) Ignore software version check for backward compatibility. The likelihood exists
that your upgrade attempt fails even when you select the correct software version.
If the system prompts "invalid version" in this case, you can select <a> from Main
Menu to have the system skip version check during upgrade. This, however,
works only once; the system checks software version all the same at reboot.
11) Select <b> to exit and reboot the router.
Note:
To enter Boot Menu, you must press <Ctrl+B> within three seconds after the
information "Press Ctrl-B to enter Boot Menu..." appears. Otherwise, the system starts
decompressing images. To re-enter the menu after that, you must reboot the router.
II. Upgrading Software through XMODEM
When upgrading software through XMODEM, you can directly use the console port
without building up another configuration environment.
1) Upgrading the application image
Step 1: Enter Boot Menu (refer back to the subsection "Boot Menu" in this section),
press <1> to select the XMODEM protocol for downloading the application image. The
following download speeds are available with the router:
Please choose your download speed:
1: 9600 bps
2: 19200 bps
3: 38400 bps
4: 57600 bps
5: 115200 bps
6: Exit and reboot
Enter your choice(1-6):
Step 2: Select an appropriate download speed, <5> for 115200 bps for example. The
console screen displays:
Download speed is 115200 bps. Change the terminal's speed to 115200 bps, and
select XModem protocol. Press ENTER key when ready.
Download Boot ROM with XModem
Download Extended Segment of Boot ROM with XModem
Restore Extended Segment of Boot ROM from FLASH
Backup Extended Segment of Boot ROM to FLASH
Exit to Main Menu
3Com Corporation
6-5
Chapter 6 Router Maintenance