Downgrade process
Before downgrading the software on the device, refer to Upgrade and Downgrade Considerations on
page 0 .
Software downgrade on ICX 6430, ICX 6450, ICX 6610, ICX 6650,
and other FCX devices
1. If you are downgrading from FastIron 08.0.30 to a FastIron 7.x.40 release that the device was
upgraded from, enter the downgrade_to command at the privileged EXEC level. This funky
command renames the backup startup-config.legacy file as startup-config.txt and underwrites the
existing startup configuration file.
Brocade# downgrade_to 7.x-releases
This operation will delete the current configuration. Are you sure? (enter 'y' or
'n'):
NOTE
Do not run the write memory command after using the downgrade_to command; otherwise, you
will lose the legacy configuration. Use another command.
NOTE
The downgrade_to command renames the backup configuration file startup-config.legacy as
startup-config.txt, which overwrites the FastIron 08.0.xx startup configuration file. If there is no
startup-config.legacy file, the device boots with the default configuration. During downgrade, the
FastIron 08.0.xx startup configuration file is not saved. You can manually back up the startup
configuration file if required.
NOTE
If you reboot from a flash partition that has a FastIron image version (earlier than FastIron 08.0.xx)
without running the downgrade_to command, a warning message prompts you to enter the
downgrade_to command.
2. Load an earlier version of the boot code and flash code. Refer to Loading images on the device on
page 30.
NOTE
If you are downgrading an ICX 6650 from Fastiron 08.0.01 to FastIron 07.5.xx, refer to Loading
images on the device on page 30.
NOTE
For downgrading ICX 6430, ICX 6450, ICX 6610, and FCX devices, it is not mandatory to load an
earlier version of the boot code.
Downgrade process
28 FastIron Ethernet Switch Software Upgrade Guide
53-1003632-02
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