IBM 2109 Service Guide - Page 83
commands in the IBM SAN Fibre Channel Switch 2109 Model S16 User's Guide., portShow, switchShow
UPC - 087944519355
View all IBM 2109 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 83 highlights
| 2 Level two long distance, up to 100 km (62 miles). A total of | 60 full-size frame buffers are reserved for the port. | You can cancel the configuration update by pressing Ctrl+D. | When a port is configured to be a long distance port, the output of the portShow | and switchShow commands displays the long distance level. In the portShow | output, the long distance level is indicated as "medium" for level 1 long distance, | and "long" for level 2 long distance. In the switchShow output, the format is Lx, | where x is the long distance level number, except for level 0, which is not displayed | in the switchShow output. | Operands | The following operand is required: | port_number Number of port to be configured: 0 - 7 or 0 - 15. | | The following operand is optional: | | long_distance_level 0 = reconfigure port to be regular switch port | 1 = level one long distance (up to 50 km) (31 miles) | 2 = level two long distance (up to 100 km) (62 miles) | Limitations | A group of four adjacent ports that share a common pool of frame buffers | (for example, ports 0 - 3 or 4 - 7) are called a "quad". Because the total | number of frame buffers in a quad is limited, if one of the ports in the quad | is configured as a long distance port, none of the remaining ports in the | quad can be a long distance port; they must all be level 0 ports. | In order to have a long distance port take effect, all switches in the fabric | must be configured to run in long distance fabric mode (in other words, the | long distance fabric mode bit must be "on", or set to 1). Otherwise, the | fabric will be segmented. In fact, a long distance port cannot be configured | in a switch unless the long distance fabric mode is on for that switch. | For the same reason, if all ports are reconfigured back to non-long distance | ports, the long distance fabric mode must be set to "off" for that switch. | Example | The following example shows the configuration of switch port 3 to support a | 100 km (62 miles) link: || sw5:admin> portCfgLongDistance 3 | Please enter the long distance level -- : (0..2) [0] 2 | Committing configuration...done. | | For additional information, see the configure, portShow, and switchShow | commands in the IBM SAN Fibre Channel Switch 2109 Model S16 User's Guide. Chapter 6. Optional features 67