Network Boot Options and Caveats
378
AlterPath OnBoard Administrator’s Guide
T
To Boot in Single User Mode from U-Boot
Monitor Mode
1.
See “To Boot in U-Boot Monitor Mode” on page 377 if needed.
2.
Boot by entering
hw_boot
followed by
single
, as shown in the
following screen example.
3.
The single-user # prompt appears
, as shown in the following screen
example
.
Network Boot Options and Caveats
When a network boot is performed with the U-boot
net_boot
command,
the OnBoard boots from the specified image on the TFTP server. The image
uses the RAMDISK as the root file system. Network boots are useful for
troubleshooting because the net-booted image can run even if there the
OnBoard’s flash memory is not usable.
Network boots are recommended only for troubleshooting and must not be
used for normal operation of the OnBoard. For example, if you want to test a
new release of the software to make sure a problem is fixed, or if the
removable flash memory becomes corrupted, you could download the
software to a tftpboot server, and then save it to the removable flash after
testing, using the
create_cf
command with the appropriate options (see
“Options for the create_cf Command” on page 381).
When a network boot is performed, the system uses one of the two following
sources of configuration data:
•
If the
net_boot
command is entered with the
configsource=factory_default
option, the factory_default
configuration files are restored.
•
Otherwise, the backed up configuration files from the
/dev/hda3
backup partition are copied to the RAMDISK and used.
Any configuration changes made after the last backup copy was made are lost
unless the configuration files were backed up before the network boot and
=>
hw_boot
single
[root@(none) /]#
Содержание AlterPath OnBoard
Страница 36: ...xxxvi AlterPath OnBoard Administrator s Guide...
Страница 108: ...Understanding How Configuration Changes Are Handled 72 AlterPath OnBoard Administrator s Guide...
Страница 116: ...Overview of Web Manager Menus 80 AlterPath OnBoard Administrator s Guide...
Страница 146: ...Configuring Regular Users Wizard 110 AlterPath OnBoard Administrator s Guide...
Страница 160: ...Upgrading AlterPath PM IPDU Software 124 AlterPath OnBoard Administrator s Guide...
Страница 194: ...Configuring an Alternate Help File Location 158 AlterPath OnBoard Administrator s Guide...
Страница 292: ...Configuring Private Subnets and Virtual Networks 256 AlterPath OnBoard Administrator s Guide...
Страница 344: ...Using the create_cf Command When Troubleshooting 308 AlterPath OnBoard Administrator s Guide...
Страница 406: ...Understanding Address Configuration for Connected Devices 370 AlterPath OnBoard Administrator s Guide...
Страница 446: ...410 AlterPath OnBoard Administrator s Guide...
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