Dell Brocade 6520 Command Reference Supporting Fabric OS v7.1.0 - Page 272

2 dlsSet NOTES OPERANDS EXAMPLES For switches running Fabric OS v7.1.0 or later, you can enable Losseless (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. 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. --enable -lossless --disable -lossless --help 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. 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. Displays the command usage. DLS configuration commands on a switch with an exchange-based policy: switch:admin> aptpolicy Current Policy: 3 0(ap) 3 0(ap) : Default Policy 1: Port Based Routing Policy 3: Exchange Based Routing Policy 0: AP Shared Link Policy 1: AP Dedicated Link Policy switch:admin> dlsshow DLS is set by default with current routing policy DLS is set with Lossless enabled 244 Fabric OS Command Reference 53-1002746-01