HP StorageWorks 2/16V HP StorageWorks Fabric OS 5.X Procedures User Guide (AA- - Page 166
Trunking over distance, Specifies the slot number for Core Switch 2/64, SAN Director
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3. Issue the portCfgLongDistance command, using the following syntax: portcfglongdistance [slotnumber/]portnumber [distance_level] [vc_translation_link_init] [desired_distance] where: slotnumber Specifies the slot number for Core Switch 2/64, SAN Director 2/128, and 4/256 SAN Director. This option is not applicable to fixed-port switches. The slot number must be followed by a slash ( / ) and the port number. portnumber Specifies the port number. distance_level Specifies the ISL mode to be set on the port (see Table 30 on page 164). vc_translation_l Is an extended link initialization sequence, which is an enhanced ink_init link reset protocol, and prevents excessive resetting of ports. By default this option is set to 1 (enabled). To prevent fabric segmentation, this option must be set to 0 (disabled) when connecting to switches running Fabric OS versions earlier than 3.0.2c or 4.0.2. It must be set to 1 (enabled) when configuring a trunk over extended fabrics. desired_distance Is required for a port configured for LD mode. Specify the desired distance, in kilometers, for the link. The specified value is the upper limit for calculating buffer availability for the port. If the measured distance is more than the specified desired_distance, the port is allocated the number of buffers required by the specified desired distance. (Fabric OS versions earlier than 4.4.0 do not support this parameter.) Note that for a 4/256 SAN Director with FC4-16 or FC4-32 port blades, ports are shown as buffer-limited. 4. Repeat step 3 for the remote extended ISL port. Both the local and remote extended ISL ports must be configured to the same distance level. When the connection is initiated, the fabric is reconfigured. The following example configures slot 1, port 1 for the LD link distance mode, enables the extended link initialization sequence, and sets the desired distance to 50 kilometers: switch:admin> portcfglongdistance 1/1 LD 1 50 switch:admin> Trunking over distance See "Trunking over extended fabrics" on page 173. 166 Administering extended fabrics