Software Downgrade On Fsx Devices; Software Downgrade From Fastiron 08.0.01 To Fastiron 07.5.Xx - Brocade Communications Systems FastIron X Series Software Update

Software downgrade on FSX devices

On FastIron SX series devices, the old management module does not support FastIron 08.0.xx
releases. The FastIron SX Series 0-Port Third Generation XL Management Module supports only
FastIron 08.0.00a or later. The FastIron SX Series 2-Port 10GbE Third Generation XL Management
Module supports only FastIron 08.0.10 or later.
NOTE
For FSX devices, you can perform a hitless downgrade if the current software is a minor upgrade or a
patch release to the lower software version. For details, refer to "Hitless management on the FSX 800
and FSX 1600" in the FastIron Ethernet Switch Administration Guide.
To downgrade an FSX device, perform the following steps.
1. Check whether the currently installed management module supports the earlier software version. If
not, uninstall the management module, and install the correct management module. For information
on installing the management module in an FSX device, refer to the Brocade FastIron SX Series
Chassis Hardware Installation Guide.
NOTE
If you have installed a management module that was factory-loaded with the required software
version, skip the next step, as the downgrade is complete.
2. Load the required boot code. For detailed steps, refer to
3. Load the required flash code. For detailed steps, refer to
NOTE
When downgrading an FSX device with the FastIron SX Series 0-Port Third Generation XL
Management Module from FastIron 08.0.10 or FastIron 08.0.10a to FastIron 08.0.0x, download the
08.0.0x flash image to the primary flash only. Downloading the 08.0.0x flash image to the secondary
flash is not supported. Reload the device with the boot system flash primary command to boot from
the primary flash. After reload, enter the copy flash flash secondary command to copy the 08.0.0x
image to the secondary flash. After a successful downgrade to FastIron 08.0.0x, downloading a
different FastIron 08.0.0x release to the secondary as well as primary flash is supported; however, a
mix of FastIron 08.0.10 or 08.0.10a and an earlier version image in the flash partitions is not
supported.

Software downgrade from FastIron 08.0.01 to FastIron 07.5.xx

Note the following while downgrading from FastIron 08.0.01 to FastIron 07.5.xx:
• You must load the primary as well as the secondary flash with the 07.5.xx flash image. A mix of
07.5.xx and 08.0.01 images in the flash partitions is not supported.
• After loading the 07.5.xx boot and flash images, reboot the device. Then load just the 07.5.xx flash
image again and reboot the device. This completes the downgrade process.
FastIron Ethernet Switch Software Upgrade Guide
53-1003632-02
Software downgrade on FSX devices
Loading images on the device
Loading the flash code on page 31.
on page 30.
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