HP StorageWorks 4/16 Brocade OS Command Reference Manual Supporting Fabric OS - Page 471

portCfgLongDistance 2 LS (6) Specify LS mode to configure a static long distance link with a fixed buffer allocation > 10 Km. Up to a total of 250 full-size frame buffers are reserved for data traffic, depending on the specified desired_distance value. vc_translation_link_init Specify 1 to activate long distance link initialization sequence. Specify 0 to deactivate this mode. When the command is run without specifying a value, 1 is assigned automatically for the long-distance link in VC_RDY flow control; otherwise, 0 is assigned. For a long-distance link not configured for ISL R_RDY mode, this parameter must be set to 1; otherwise, it must be reset to 0. This operand is optional. desired_distance THis parameter is required parameter when a port is configured as an LD or an LS mode link. In LD mode, the value of desired_distance is the upper limit of the link distance and is used to calculate buffer availability for other ports in the same port group. When the measured distance exceeds the value of desired_distance, this value is used to allocate the buffers. In this case, the port operates in degraded mode instead being disabled due to insufficient buffers. IN LS mode, the actual link distance is not measured, instead the desired_distance is used to allocate the buffers required for the port. Notes This command requires a Brocade Extended Fabrics license. The execution of this command is subject to Admin Domain restrictions that may be in place. The long distance modes L0.5, L1, and L2 are no longer supported in v5.3.0 and above. A long-distance link also can be configured to be part of a trunk group. Refer to portCfgTrunkPort help for details. When a port is configured as a long-distance port, the output of portShow and switchShow displays the long-distance level. Refer to portShow help and switchShow help for details. The portCfgISLMode and portCfgLongDistance LE, LD, or LS levels only can be enabled at the same time. Such an ISL uses R_RDY mode of flow control over the long-distance link. While using R_RDY mode flow control, an E_Port cannot form trunk groups of long-distance links even if the trunking is enabled. This feature is not backward compatible with firmware versions that do not support it. Ctrl-D will cancel the configuration update. Examples To configure a switch port 63 to support a 100 Km link and be initialized using the long distance link initialization protocol: switch:admin> portcfglongdistance 4/15 LS 1 100 switch:admin> portshow 4/15 portCFlags: 0x1 portFlags: 0x20001 PRESENT LED portType: 1.1 portState: 2 Offline portPhys: 4 No_Light portScn: 0 portId: 013f00 portWwn: 20:3f:00:60:69:00:02:48 Distance: super long