Fabric OS Reference Manual

Telnet Commands 151

Operands This command has the following operands:

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”. Since 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. A long distance port cannot be configured in a

switch unless the long distance fabric mode is on for that switch.

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 To configure switch port 3 to support a 100 km link: