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52 AR400 Series Router User Guide

Software Release 2.5.2

C613-02034-00 REV A

temporary install fails the router will automatically run the preferred install if

there is one, or otherwise the default install, the next time the router reboots.

When the router reboots, it checks the install information in a strict order:

• Firstly, the router checks the temporary install. If a temporary install is

specified, the router loads it into RAM and runs it. At the same time, it

deletes the temporary install information so it will not load a second

time. This information is deleted even if the temporary install triggers a

fatal condition causing the router to reboot immediately.

• Secondly, if no temporary install is defined, or the install information is

invalid, the router checks the preferred install. If present, this install is

loaded. The router never deletes the preferred install information.

• Thirdly, if neither a temporary install nor a preferred install is specified,

the router loads the default install. The default install is always present

in the router because if, for some reason, it is not, the INSTALL module

will restore it.

The preferred install should not be set up with an untested release or patch. It

is advisable to install new releases or patches as the temporary install, and

when the router boots correctly, to then set up the preferred install with the new

release or patch.

To change the install information in the router, enter the command:

SET INSTALL={TEMPORARY|PREFERRED|DEFAULT}

[RELEASE={release-name|EPROM}] [PATCH=patch-name]

For security reasons the SET INSTALL command is only accepted if the user has

SECURITY OFFICER privilege.

When you set a patch file as part of a temporary install or permanent install,

you must also set the corresponding release file in the same command, if it has

not already been set as part of that install. You can set the patch, but not the

release (always EPROM), for the default install.

To delete a temporary install or preferred install, enter the command:

DELETE INSTALL={TEMPORARY|PREFERRED}

If a default install is set, only the patch information is deleted using the

DELETE INSTALL command as the release information must always be left

intact in the default install.

To display the current install information, including which install is currently

running in the router, and how the install information was checked at the last

reboot, enter the command:

SHOW INSTALL

For more information about INSTALL commands, see the Operations chapter in

the AR400 Series Router Software Reference.

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Allied Telesis AR450S Guide de l'utilisateur Page 52