2 – General Description
Fibre Channel Ports
2-6 59042-00 A
2.2.2.3
Translated Loop Port
A TL_Port supports a loop of up to 126 private devices with the ability to
communicate with “off-loop” devices such as public fabric devices and private
devices on other TL_Ports. TL_Ports connect to devices that conform to the Fibre
Channel-Private Loop SCSI Direct Attach (FC-PLDA) standard. Devices
connected to TL_Ports are registered with the Name Server. Use SANbox
Manager or the CLI to explicitly configure a TL_Port.
A TL_Port acts as a proxy for the off-loop device translating private frames into
and from public frames. Each TL_Port can proxy up to 63 off-loop public or private
devices that are maintained in its translation entries list.
■For a TL_Port connected to private target devices, the switch firmware
automatically creates an entry in the translation entries list for each off-loop
initiator device that attempts to establish communication. Soft zoning can be
used to limit the number of potential initiators to 63.
■For a TL_Port connected to private initiator devices, the switch firmware
automatically creates an entry in translation entries list for each target device
that is a member of the same soft zone as the TL_Port devices. Before the
TL initiator can communicate with other target devices on your fabric, you
must create a WWN soft zone that includes both the initiator and targets.
Initiator devices can not communicate with target devices outside the zone.
2.2.3
Logged-In LED
The Logged-in LED indicates the logged-in or initialization status of the connected
devices. After successful completion of the POST, the switch extinguishes all
Logged-In LEDs. Following a successful loop initialization or port log-in, the switch
illuminates the corresponding logged-in LED. This shows that the port is properly
connected and able to communicate with its attached devices. The Logged-In
LED remains illuminated as long as the port is initialized or logged-in. An
Logged-In LED will also illuminate when the port has been designated as a donor
port and its buffer credits are being used by another port. Refer to ”Distance” on
page 3-6 for more information about extended credits and donor ports.
If the port connection is broken or an error occurs that disables the port, the
Logged-In LED will flash. Refer to ”Logged-In LED Indications” on page5-3 for
more information about the Logged-In LED.