HP StorageWorks MSA 2/8 HP StorageWorks Fabric OS 3.X Document Addendum (AA-RW - Page 201
Limitations, Example, See Also
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Fabric OS reference guide Limitations Example VC_translation_link_init See the "Description" on page 199 section for the meaning of this value. The default value is 1 when not specified with the long-distance setting. Therefore, the command portcfglongdistance port_number implies portcfglongdistance port_number, LD, 1. Because the total number of frame buffers is limited in a quad, if one of the ports in the quad is configured and enabled as an L2 long-distance port, all remaining ports are disabled due to the lack of sufficient buffer credits. Similarly, you also can configure an L1 long-distance port in combination with other port types provided there are sufficient buffer credits for the remaining ports in the quad. As an example, here are two valid port configurations: two L1 long-distance ports at 2 Gbit/sec speed, or four LE or three L0.5 long-distance ports at 2 Gbit/sec. A quad is defined as a group of four adjacent ports that share a common pool of frame buffers. Ports 0 through 3 belong to a quad, as do ports 4 through 7, and so forth. If the long-distance links are between StorageWorks 1 GB switches, in order to have a long-distance port take effect, all switches in the fabric must be configured to run the long-distance fabric mode (for instance, the long-distance fabric mode bit must be set to be 1). Otherwise, the fabric segments. In fact, you cannot configure a long-distance port in a switch unless the long-distance fabric mode is on for that switch. For the same reason, when all ports are reconfigured to non-long-distance ports, you must reconfigure the long distance fabric mode for that switch. This restriction does not apply to fabrics with long-distance links between StorageWorks 2 GB switches. Configurations with long-distance links between 2000- and 3000-series switches are not supported. To configure switch port 3 to support a 100 km link: switch:admin> portCfgLongDistance 3, "L2" Committing configuration...done. See Also To configure the port for long distance, to support a 50 km link with enhanced link reset protocol: switch:admin> portCfgLongDistance 3, "L1", 1 Committing configuration...done. configure portcfgshow portshow switchshow Fabric OS 3.x Document Addendum 201