HP AE370A HP StorageWorks Fabric OS 6.x administrator guide (5697-0015, May 20 - Page 370

4. Enter the portCfgLongDistance command, using the following syntax: portcfglongdistance [slotnumber/]portnumber [distance_level] [vc_translation_link_init] [desired_distance] slotnumber portnumber distance_level For blades, the slot number in which the blade is located. The slot number must be followed by a slash (/) and the port number. This option is not used for fixed-port switches. The port number. One of the following (the numerical value representing each distance_level is shown in parentheses): L0 (0) Specify L0 to configure the port to be a regular switch port. LE (3) Specify LE mode for distances up to 10 Km. LD (5) Specify LD for automatic long-distance configuration. The buffer credits for the given E_Port are automatically configured, based on the actual link distance measured during E_Port initialization. LS (6) Specify LS mode to configure a long-distance link with a buffer allocation based on a fixed desired distance value. vc_translation_link_in Enables the long-distance link initialization sequence. This it extended link initialization sequence is an enhanced link reset protocol, and avoids excessive resetting of ports. By default this option is set to 1 (enabled). desired_distance It must be set to 1 (enabled) when configuring a trunk over extended fabrics. It must be set to 1 for a long-distance link not configured for ISL R_RDY mode; otherwise, it must be reset to 0. For an LD-mode link, desired_distance is a threshold limit for link distance to ensure buffer availability for other ports in the same port group. If the measured distance exceeds desired_distance, then desired_distance is used. For an LS-mode link, desired_distance is used to calculate the buffers required for the port. 5. Repeat step 4 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 will reconfigure. 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 50 370 Administering Extended Fabrics