HP A7533A - Brocade 4Gb SAN Switch Base Administrator's Manual page 188

Disable the switch and change the routing policy selection to one of the following supported selections on
firmware 5.1.0 using the aptPolicy command, and then retry the firmware download operation. The
supported selections are:
policy 1 Port-based routing policy
With this policy, the path chosen for an incoming frame is based on:
1. Incoming port on which the frame was received
2. Destination domain for the frame
The chosen path remains the same if the dynamic load sharing (DLS) feature is not
enabled. If DLS is enabled, then a different path may be chosen on a fabric event.
Refer to the dlsSet command for the definition of a fabric event.
This policy may provide better ISL utilization when there is little or no oversubscription
of the ISLs.
NOTE: Static routes are supported only with this policy.
policy 3 Exchange-based routing policy
With this policy, the path chosen for an incoming frame is based on:
1. Incoming port on which the frame was received
2. FC address of the Source ID (SID) for this frame
3. FC address of the Destination ID (DID) for this frame
4. FC Originator Exchange ID (OXID) for this frame
This policy allows for optimal utilization of the available paths as I/O traffic between
different (SID, DID, OXID) pairs can use different paths. All frames received on a
incoming port with the same (SID, DID, OXID) parameters takes the same path unless
there is a fabric event. Refer to the dlsSet command for the definition of a fabric
event.
This policy does not support static routes. DLS always is enabled and the DLS setting
cannot change with this policy.
Message
Cannot downgrade due to the presence of broadcast zone(s). Remove or disable them
before proceeding.
Probable cause and recommended action
If the switch is running 5.3.0 or higher, and a "broadcast zone" is configured, the user will not be allowed
to downgrade the switch to 5.2.0 or earlier, as a broadcast zone gets a special meaning in 5.3.0, but it
will be treated as regular zone in 5.2.0 or earlier.
Use the zoneRemove command to remove the zone or zoneDelete command to delete the zone.
Message
Cannot downgrade due to the presence of IP6 addresses on the switch. Please
reconfigure these addresses before proceeding. (Firmwaredownload will tell the
user which addresses are configured with IP6 and commands used for remedy.).
Probable cause and recommended action
If switch is running 5.3.0 or higher, and if there are any IP6 addresses configured, e.g. switch IP address,
syslog IP addresses, radius server, etc. the user will not be allowed to downgrade to a version that does not
support IP6.
Use the ipaddrset command to change the IP6 addresses to IP4 addresses.
188 Installing and maintaining firmware