Technical data

6-4 Fabric OS Administrator’s Guide
Publication Number: 53-0000518-09
Using Dynamic Load Sharing
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To force in-order frame delivery across topology changes
1. Connect to the switch and log in as admin.
2. At the command line, enter the iodSet command.
To restore out-of-order frame delivery across topology changes
1. Connect to the switch and log in as admin.
2. Enter the iodReset command at the command line.
Using Dynamic Load Sharing
The device-based and exchange-based routing policies depend on the Fabric OS Dynamic Load Sharing
feature (DLS) for dynamic routing path selection. When these policies are in force, DLS is by default
enabled and cannot be disabled.
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
a switch boots up or each time an E_Port goes offline and online, or a Fx_Port goes offline.
To check and set DLS
1. Connect to the switch and log in as admin.
2. Enter the dlsShow command to view the current DLS setting.
One of the following messages appears:
• “DLS is set” indicates that dynamic load sharing is turned on.
• “DLS is not set” indicates that dynamic load sharing is turned off.
3. Enter the dlsSet command to enable DLS or enter the dlsReset command to disable it.
You cannot disable DLS when device-based or exchange-based routing policies are in effect.
Example
N
ote
This command can cause a delay in the establishment of a new path when a topology change occurs; use
it with care.
switch:admin> dlsshow
DLS is not set
switch:admin> dlsset
switch:admin> dlsshow
DLS is set
switch:admin> dlsreset
switch:admin> dlsshow
DLS is not set