Q-Logic 16HA user manual Translated Loop Port TLPort Overview, Private Loop, Fabric

Major Fibre Channel Port Features

Translated Loop Port (TL_Port) Overview

You may use Switch management to configure any or all ports on the SANbox-16 chassis as Translated Loop ports (TL_Ports). TL_Ports connect to devices which conform to the Fibre Channel-Private Loop SCSI Direct Attach (FC-PLDA) standard. Each TL_Port allows connectivity between the Private Loop devices on the loop and “off-loop” devices (devices not connected to that particular TL_Port) such as Public devices connected to F and FL_Ports and private devices on other TL_Port loops. This connectivity is achieved by having a translation function at each TL_Port which translates Private frames to Public frames and vice versa.

Figure 1-3shows possible Fabric topologies with both public and Private SCSI devices. In this figure, the TL_Ports are ports with Translation Mode functions. The following three scenarios are supported by TL_Ports:

•Server 1 to ST1 (Public Initiator to/from Private Target)

•Server 2 to ST2 (Private Initiator to/from Public Target)

•Server 3 to ST3 (Private Initiator through fabric to/from Private Target on different loop)

Server 1

ST1

Private Loop

Hub

FL_Port

F_Port

Fabric

TL_Port

TL_Port

Private Loop 1

JBOD

ST2

Server 2

Hub

ST3

Server 3

Private Loop 2

Figure 1-3 SCSI

1-6General Description		SANbox-16HA Fibre Channel Switch
	59005-03 Rev. A	Installer’s/User’s Manual