Aptpolicy - Brocade Communications Systems A7533A - Brocade 4Gb SAN Switch Base Command Reference Manual

aptPolicy

Changes or displays the Advanced Performance Tuning (APT) policy.
Synopsis aptpolicy [ap_policy]
aptpolicy -ap <ap_policy>
Description Use this command to manage advanced performance tuning (APT) policies on a switch or chassis.
Several internal performance tuning parameters can be modified with this command. The default
parameters (AP shared Link Policy) are optimized for most SAN applications; in most environments,
there is no need to modify the default policy.
Notes The switch must be disabled before using this command to change the current policy. Changes
take effect immediately for all EX/VEX_Ports after the switch is re-enabled.
For details on performance-tuning, refer to the Fabric OS Administrator's Guide.
The execution of this command is subject to Admin Domain restrictions that may be in place. Refer
to chapter 1, "Understanding Admin Domain Restrictions" and Appendix A, "Command Availability"
for details.
Operands When invoked without arguments, this command displays the current list of advanced performance
tuning (APT) policies supported on this switch, as well as the current policy.
This command has the following operand:
ap_policy
Fabric OS Command Reference
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Specifies the APT policy. The following polices are supported:
1 Port-based routing policy. With this policy, the path chosen for an ingress
frame is based on:
•
Ingress port on which the frame was received
•
Destination domain for the frame
The chosen path remains the same if Dynamic Load Sharing (DLS) is not
enabled. If DLS is enabled, then a different path might be chosen on a fabric
event. Refer to dlsSet 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 that static routes are supported only with this policy.
3 Exchange-based routing policy (default). With this policy, the path chosen for
an ingress frame is based on:
•
Ingress port on which the frame was received
•
FC address of the source fabric device (SID) for this frame
•
FC address of the destination fabric device (DID) for this frame
•
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 an ingress port with the same (SID, DID, OXID) parameters takes
the same path unless there is a fabric event. Refer to dlsSet for the definition
of a fabric event.
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aptPolicy
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