Setup Guide

Message Cannot upgrade directly to v7.4.0. Upgrade your switch to v7.3.0 first
before upgrading to the requested version.
Probable cause and recommended action If the switch is running v7.2.0 or earlier, you are not allowed to upgrade
directly to v7.4.0 because of the "two-version" rule.
Upgrade your switch to Fabric OS version v7.3.0 before upgrading to
v7.4.0
Message Non-disruptive firmwaredownload is not supported when downgrading to
7.2. Please use firmwaredownload -s to download the 7.2 firmware.
Probable cause and recommended action If the switch is running v7.4.0, you are not allowed to downgrade directly
to v7.2.x without causing disruption to your fabric.
Downgrade using the firmwareDownload -s command.
Platform
The following system message pertains to switch features or fabric-wide settings that must be removed or disabled before downgrading
the firmware.
Message Downgrade is not allowed because VF is enabled. Please run "lscfg --
config" and "lscfg --delete" commands to remove the non-default LS first,
then run "fosconfig --disable vf" to disable VF before proceeding.
Probable cause and recommended action You cannot downgrade because Virtual Fabrics is enabled. Delete the
logical switches, delete the base switch, and disable Virtual Fabrics prior to
downgrading the firmware.
Routing
The following system message refers to any route settings that must be changed prior to downgrading the switch’s firmware.
Message Please use "configure" to clear the location ID.
Probable cause and recommended action If the switch is running v7.1.0 or later, and Location-Oriented Link
Aggregation is configured, you cannot downgrade the switch to v7.0.0 or
earlier.
Use the configure command to clear the location ID.
Firmware Download Errors
Brocade Fabric OS Troubleshooting and Diagnostics Guide
62 53-1004126-01