HP AM866A Brocade Troubleshooting and Diagnostics Guide v6.1.0 (53-1000853-01, - Page 68

Routing, Zoning, FC Originator Exchange ID OXID for this frame

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5 Considerations for downgrading firmware Use the portDisable command to disable these ports before proceeding. Message Routing These error messages refer to routing policies. Cannot downgrade to v5.1.0 because Device Based routing policy is not supported by v5.1.0. Use aptPolicy to change the routing policy before proceeding. Probable cause and recommended action The firmware download operation was attempting to upgrade a system to Fabric OS v5.1.0 with device-based routing policy selected. Device-based routing policy is not supported in firmware v5.1.0 or later, so the firmware download operation was aborted. Disable the switch and change the routing policy selection to one of the following supported selections on firmware v5.1.0 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. Zoning These messages refer to any zone settings that need to be fixed prior to downgrading the switch's firmware. 54 Fabric OS Troubleshooting and Diagnostics Guide 53-1000853-01

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54
Fabric OS Troubleshooting and Diagnostics Guide
53-1000853-01
Considerations for downgrading firmware
5
Use the
portDisable
command to disable these ports before proceeding.
Routing
These error messages refer to routing policies.
Message
Cannot downgrade to v5.1.0 because Device Based routing policy is not supported by v5.1.0. Use
aptPolicy to change the routing policy before proceeding.
Probable cause and recommended action
The firmware download operation was attempting to upgrade a system to Fabric OS v5.1.0 with
device-based routing policy selected. Device-based routing policy is not supported in firmware
v5.1.0 or later, so the firmware download operation was aborted.
Disable the switch and change the routing policy selection to one of the following supported
selections on firmware v5.1.0 using the
aptPolicy
command, and then retry the firmware download
operation. The supported selections are:
Zoning
These messages refer to any zone settings that need to be fixed prior to downgrading the switch’s
firmware.
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.