3Com 3C13701 Installation Manual page 55

Upgrading the Entire Boot ROM Image
1 Enter Boot Menu, and select <9> to enter Boot ROM Download Menu as follows:
Boot ROM Download Menu:
1: Download Boot ROM with XModem
2: Download Extended Segment of Boot ROM with XModem
3: Restore Extended Segment of Boot ROM from FLASH
4: Backup Extended Segment of Boot ROM to FLASH
5: Exit to Main Menu
Enter your choice(1-5):
2 Select <1> in Boot ROM Download Menu to download the Boot ROM image through
XMODEM. Multiple download speeds are available. The subsequent steps are the same
as those described in the item "Upgrading the Application Image" in this subsection.
CAUTION: Only upgrade the entire Boot ROM program when absolutely necessary and
with the guidance of technical staff. There is no on-site recovery in the event of an
upgrade failure.
Upgrading the Extended Segment of the Boot ROM Image
1 Enter Boot Menu, select <9> to enter Boot ROM Download Menu.
2 Select <2> in the menu to upgrade the extended segment of the Boot ROM image
through XMODEM. Multiple speed options are available. The subsequent steps are the
same as those described in the item "Upgrading the Application Image" in this
subsection.
CAUTION: This upgrade approach upgrades only a portion of the Boot ROM image, so
you can make a second attempt once errors occur.
Backing Up and Restoring the Extended Segment of the Boot ROM Image
1 Back up the extended segment of the Boot ROM image to Flash memory
a Enter Boot Menu, select <9> to enter Boot ROM Download Menu.
b In Boot ROM Download Menu, select <4> to copy the current extended segment to
Flash memory.
Backup Extended Segment, are you sure?[Y/N]
c Enter <Y>. For a successful backup, the console screen displays:
Writing to FLASH.Please wait...####
Backuping Boot ROM program to FLASH successed!
d When Boot ROM Download Menu appears again, select <5> to and reboot the router.
2 Restore the extended segment of the Boot ROM image from Flash memory
In case faults occur to the extended segment or the upgrade is done inadvertent, take
these steps to restore the extended segment of the Boot ROM image from Flash memory
to the Boot ROM:
a Enter Boot Menu, select <9> to enter Boot ROM Download Menu.
b In Boot ROM Download Menu, select <3> to restore the extended segment from Flash
memory.
Restore Extended Segment, are you sure?[Y/N]
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