Brocade Fabric OS Command Reference Manual (53-1000240-01, November 2006)

Fabric OS Command Reference Manual 2-447
Publication Number: 53-1000240-01
portCfgISLMode
2
Note: Enter commands in lowercase only; mixed case is for readability.
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.
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; ELP with flow control mode 01 segments 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:
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 Switching fabric.ops.mode.tachyonCompat
Unicast-only Operation fabric.ops.mode.unicastOnly
Per-frame Route Priority fabric.ops.mode.useCsCtl
These parameters can be modified using configure (see configure for more information on the fabric
parameters).
The following E_Port configurations are not applicable to a port configured for ISL R_RDY mode:
• Trunk port
• Long distance (L0.5, L1, or L2)
• VC link init
If configured, these port configuration parameters are ignored during the E_Port initialization. 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.
If the PID format for two ISL R_RDY mode ports are not the same, zoning will drop frames.
This feature is persistent across reboots and power cycles.
Use the portCfgShow command to view whether ISL R_RDY mode is enabled on a port.
N
ote
The portCfgISLMode and portCfgLongDistance mode both cannot be enabled at the same time;
otherwise, fabric segmentation occurs.