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2 – General Description
Fibre Channel Ports
2-6 59021-04 C
Q
2.2.2.2
Activity LED
The Activity LED indicates that data is passing through the port. Each frame that
enters or leaves the port causes this LED to illuminate for 50 milliseconds. This
makes it possible to observe the transmission of a single frame. When extending
credits, an Activity LED for a donor port will reflect the traffic of the recipient port.
Refer to ”Distance” on page 3-6 for more information about extended credits and
donor ports.
2.2.3
Port Modes
SANbox2-16 switches support the following port modes:
■ Generic ports (GL_Port and G_Port)
■ Fabric ports (FL_Port and F_Port)
■ Translated loop ports (TL_Port)
■ Expansion ports (E_Port)
Switches come from the factory with all ports configured as GL_Ports. GL_Ports
self-configure in the following ways:
■ FL_Port when connected to a loop of public devices
■ F_Port when connected to a single public device. If the device is a single
device on a loop, the GL_Port will attempt to configure first as an F_Port,
then if that fails, as an FL_Port.
■ E_Port when connected to another FC-SW-2 compliant switch
G_Ports self-configure in the following ways:
■ F_Port when connected to a public device
■ E_Port when connected to another FC-SW-2 compliant switch
A TL_Port supports private loop devices and must be configured explicitly. Refer
to the SANbox2-8c/16 Switch Management User’s Guide for more information
about defining port modes.
2.2.3.1
Fabric Ports
An FL_Port can support a loop of up to 126 public devices. An FL_Port can also
configure itself during the fabric login process as an F_Port when connected to a
single public device (N_Port).