HP StorageWorks 4/16 Brocade OS Command Reference Manual Supporting Fabric OS - Page 468

2 portCfgISLMode portCfgISLMode Enables or disables ISL R_RDY mode on a port. Synopsis portcfgislmode [[slotnumber/]]portnumber, mode Description Use this command to enable or disable ISL R_RDY mode on a port. If enabling ISL R_RDY mode on a port, make sure the PID format is consistent across the entire fabric. Refer to the configure command for more information on the core PID format. This configuration can be cleared but not set on VE/VEX_Ports. Use the portCfgShow command to determine whether ISL R_RDY mode is enabled on a port. This configuration can be cleared but not set on VE/VEX_Ports. ISL R_RDY mode sends an ELP with flow control mode 02. If a port is ISL R_RDY mode-enabled, it can only receive ELP with flow control mode 02. A received ELP with flow control mode 01 will segment the fabric. This mode cannot detect any inconsistencies in fabric operating mode parameters, such as the PID format of connected ports. Before using this mode, the fabric administrator must ensure all fabric-wide parameters are consistent for every switch in the fabric. The complete list of fabric operating mode parameters is shown below. These parameters can be modified using the configure command. Disable Device Probing fabric.ops.mode.fcpProbeDisable Isolated Operation fabric.ops.mode.isolate Long Distance Fabric fabric.ops.mode.longDistance Suppress Class F Traffic fabric.ops.mode.noClassF Switch PID Format fabric.ops.mode.pidFormat Sequence Level Switchingfabric.ops.mode.tachyonCompat Unicast-only Operation fabric.ops.mode.unicastOnly Per-frame Route Priority fabric.ops.mode.useCsCtl If the PID format for two ISL R_RDY mode ports are not the same, zoning will drop frames. The following E_Port configurations are not applicable to a port configured for ISL R_RDY mode. If configured, these port configuration parameters will be ignored during E_Port initialization: • Trunk port • VC link init The portCfgISLMode and portCfgLongDistance levels LE, LD, or LS only can be enabled at the same time. Such an ISL uses R_RDY mode of flow control over the long distance link. This feature is not backward compatible with firmware versions that do not support it. Notes The long distance modes L0.5, L1, and L2 are no longer supported in v5.3.0 and above. Changes made by portCfgISLMode are persistent across switch reboots and power cycles. The execution of this command is subject to Admin Domain restrictions that may be in place. 442 Fabric OS Command Reference 53-1000599-01