Administrator Guide

Fabric OS Administrator’s Guide 125
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Route selection
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Setting the routing policy
Use the following procedure to set the routing policy.
1. Connect to the VF switch and log in as admin.
2. Enter the setcontext [FID | switchname] command for the correct Fabric ID or switch name.
• The fabricID parameter is the FID of the logical switch you just created.
• The switchname parameter is the name assigned to the logical switch.
• You can only use one parameter at a time.
switch:admin> setcontext 20
3. Enter the switchDisable command to disable the switch.
4. Take the appropriate following action based on the AP route policy you choose to implement:
• If the exchange-based policy is required, enter the aptPolicy 3 command.
• If the port-based policy is required, enter the aptPolicy 1 command.
Setting the AP route policy
The AP route policy can only be set in the base switches that are using Virtual Fabrics.
Use the following procedure to set the AP route policy.
1. Connect to the base switch and log in as admin.
2. Enter the switchDisable command to disable the switch.
3. Take the appropriate following action based on the AP route policy you choose to implement:
• If the AP Shared Link policy (default) is required, enter the aptPolicy -ap 0 command.
• If the AP Dedicated Link policy is required, enter the aptPolicy -ap 1 command.
Route selection
Selection of specific routes can be dynamic, so that the router can constantly adjust to changing
network conditions; or it may be static, so that data packets always follow a predetermined path.
Dynamic Load Sharing
The Fabric OS Dynamic Load Sharing (DLS) feature for dynamic routing path selection is required
by the exchange-based and device-based routing policies. When using these policies, DLS is
enabled by default and cannot be disabled. In other words, you cannot enable or disable DLS when
the exchange-based routing policy is in effect.
When the port-based policy is in force, you can enable DLS to optimize routing. When DLS is
enabled, it shares traffic among multiple equivalent paths between switches. DLS recomputes load
sharing when any of the following occurs:
• A switch boots up
• An E_Port goes offline and online