2 – General Description
Fibre Channel Ports
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Transceivers
The SANbox 5802V switch supports SFP optical transceivers for the SFP ports 
and XPAK optical transceivers or XPAK stacking cables for the XPAK ports. A 
transceiver converts electrical signals to and from optical laser signals to transmit 
and receive data. Duplex fiber optic cables plug into the SFP transceivers which 
then connect to the devices. An SFP port is capable of transmitting at 2-, 4-, or 
8-Gbps; however, the transceiver must also be capable of delivering at these 
rates.
The SFP and XPAK transceivers are hot-pluggable. This means that you can 
remove or install a transceiver while the switch is operating without harming the 
switch or the transceiver. However, communication with the connected device will 
be interrupted. Refer to “Install Transceivers” on page 4-5 for information about 
installing and removing SFP and XPAK optical transceivers.
Port Types
SANbox 5802V switches support generic ports (G_Port, GL_Port), fabric ports 
(F_Port, FL_Port), and expansion ports (E_Port). Switches come from the factory 
with all SFP ports configured as GL_Ports. The XPAK ports come from the factory 
configured as G_Ports. Generic, fabric, and expansion ports function as follows:
 A GL_Port self-configures as an FL_Port when connected to a loop device, 
as an F_Port when connected to a single device, or as an E_Port when 
connected to another switch. 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.
 A G_Port self-configures as an F_Port when connected to a single device, or 
as an E_Port when connected to another switch.
 An FL_Port supports a loop of up to 126 devices. An FL_Port can also 
configure itself during the fabric login process as an F_Port when connected 
to a single device (N_Port).
 An F_Port supports a single device.
 E_Ports enable you to expand the fabric by connecting SANbox 5802V 
switches.
SANbox 5802V switches self-discover all inter-switch connections. Refer to 
“Multiple Chassis Fabrics” on page 3-6 for more information.