Huawei Quidway AR 28 Series Installation Manual page 79

Quidway AR 28 Series Routers Installation Manual
Thus, empty configuration applies at reboot. The system removes the Ignore flag after
its boot completes.
In case you forget the password, you may select this option to have the router boot with
the configuration file ignored. After accessing the system, you may change or delete
the password. Note that if not saved, the modified configuration cannot survive a reboot.
To have the router reboot with the new configuration, you must perform the save
operation after completing configuration.
8) Enter debugging environment in case of faults.
9) Enter the Boot ROM operation menu.
Select <9> to enter Boot ROM Download Menu as follows for upgrade, backup, or
recovery:
Boot ROM Download Menu:
1:
2:
3:
4:
5:
Enter your choice(1-5):
10) a: 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:
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
Huawei Technologies Proprietary
6-6
Chapter 6 Router Maintenance