Brocade Fabric OS Command Reference (Supporting Fabric OS v7.3.0) - Manual (Page 280)

250 Fabric OS Command Reference
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dlsSet
2
NOTES
For switches running Fabric OS v7.1.0 or later, you can enable Lossless (or enable Fabric Management
Server mode) when XISL is enabled and enable XISL when Lossless or Fabric Management Server
mode is enabled.
When you downgrade from Fabric OS v7.1.x to Fabric OS v7.0.x the following rules apply: If Lossless (or
Fabric Management Server mode) and XISL use are not enabled at the same time, firmware download
can be executed. If both of them are enabled, firmware download is rejected with an error message.
If the active control processor (CP) runs Fabric OS v7.1.x or later, and the standby CP runs Fabric OS
v7.0.x and if both Lossless (or Fabric Management Server mode) and XISLs are enabled, High
Availability synchronization will fail. Otherwise, standby CP will synchronize with the active CP. After the
synchronization of the active and standy CP, enabling Lossless (or Fabric Management Server mode),
when XISL is enabled, is rejected with an error message. Enabling XISL, when Lossless (or Fabric
Management Server mode) is enabled, is also rejected with an error message.
Use the configure command to disable XISL use.
Lossless is supported with both exchange-based and port-based routing policies. Behavior depends on
the kind of policy configured and concurrent IOD settings. Refer to the Fabric OS Administrator's Guide
for information on how to optimize your configuration. Refer to the aptPolicy help page for more
information on routing policies.
The Lossless feature is not supported on GbE ports and FCoE. On unsupported platforms, this
command exits with an appropriate message.
When the E_Port Balance Priority feature status is changed using --enable -eportbal or --disable
-eportbal, the status of the DLS and Lossless features remains unchanged. The E_Port Balance Priority
feature is supported only on multi-ASIC platforms like Brocade 5300, 6520, DCX, DCX-4S, DCX 8510-8,
and DCX 8510-4.
The execution of this command is subject to Virtual Fabric or Admin Domain restrictions that may be in
place. Refer to Chapter 1, "Using Fabric OS Commands" and Appendix A, "Command Availability" for
details.
OPERANDS
--enable -lossless
Enables the Lossless feature. Frame loss is reduced while the path is rerouted. If
DLS is set on the switch, this command adds the Lossless feature to the existing
DLS legacy mode. If DLS is not set on the switch, this command enables both
DLS and the Lossless feature. The Lossless feature is disabled by default.
--disable -lossless
Disables the previously enabled Lossless feature. Execution of this command is
equivalent to the legacy dlsSet command. Dynamic load balancing is enforced
but not without frame loss. DLS (legacy mode) continues to be enabled after
Lossless is disabled. Use dlsReset to disable DLS completely.
--enable -eportbal
Enables the E_Port Balance Priority feature. The E_Port load is rebalanced when
topology changes occur, such as an E_Port going offline and then online. If DLS is
disabled on the switch, it remains disabled with this command.
--disable -eportbal
Disables the E_Port Balance Priority feature.
--rebalance
Rebalances the E_Port load on a logical switch, without waiting for a topology
change to occur.
--rebalance -all
Rebalances the E_Port load on all logical switches, without waiting for a topology
change to occur.
--help
Displays the command usage.