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62 Chapter 5: Router Software Maintenance
Restore the baud rate of the console terminal to 9600 bps as prompted,
disconnect the terminal and dial again. Then, you can see the system
boot banner.
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: You are recommended to upgrade the entire Boot ROM
program only when necessary and with the guide of technical staff,
because no means is available for on-field recovery in case 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
Step 1: Enter Boot Menu, select <9> to enter Boot ROM Download
Menu.