HP A7533A - Brocade 4Gb SAN Switch Base Administrator's Manual page 192

Message
Cannot downgrade to v5.2.0 or lower because ge port(s) has IPSec and Fastwrite enabled. Please use
portcfg command to disable Fastwrite and try again.
Probable cause and recommended action
If a GE port has IPSec and Fastwrite enabled, the user will not be allowed to downgrade to v5.2.0 or
earlier.
Use the portcfg command to disable Fastwrite and try again.
Message
Cannot downgrade to v5.2.0 or lower because GE port(s) has DSCP enabled. Please use portcfg
command to disable it and try again.
Probable cause and recommended action
If a GE port has DHCP enabled, you will not be allowed to downgrade to v5.2.0 or earlier.
Use the portcfg command to disable it and try again.
Message
Cannot downgrade due to presence of port mirror connections. Use portmirror delete to remove these
--
mirror connections before proceeding.
Probable cause and recommended action
The firmware download operation was attempting to downgrade a system to Fabric OS v5.1.0 or earlier
with Port Mirroring enabled. Port Mirroring is not supported on firmware v5.1.0 or earlier, so the firmware
download operation failed.
Remove the mirror connections using the portMirror - -delete command. Retry the firmware
download operation.
Message
Cannot downgrade directly to version 4.4 or lower. Please downgrade to v5.1.0 or v5.0.0 first and then
download the desired version.
Probable cause and recommended action
The firmware download operation was attempting to downgrade a system directly to Fabric OS v4.4.0 or
earlier. This firmware jump is not supported, so the firmware download operation aborted.
Downgrade the system to firmware v5.1.0 or v5.0.0 first, and then download to the desired firmware
version.
Message
Cannot downgrade to version v4.2.0 or lower. Please downgrade to v5.0.0 or v4.4.0 first and then
download the desired version.
Probable cause and recommended action
The firmware download operation was attempting to downgrade a system from Fabric OS v5.1.0 directly to
firmware v4.2.0 or earlier. This firmware jump is not supported, so the firmware download operation
aborted.
Downgrade the system to firmware v4.4.0 or v5.0.0 first, and then downgrade to the desired firmware
version.
194 Installing and maintaining firmware