Transceivers; Port Types; Ethernet Port - HP StorageWorks 8/20q Installation And Reference Manual

Transceivers

The 8/20q Fibre Channel Switch supports SFP+ optical transceivers for the Fibre Channel ports. A
transceiver converts electrical signals to and from optical laser signals to transmit and receive data. Duplex
fiber optic cables plug into the transceivers which then connect to the devices. A port is capable of
transmitting at 8 Gb/s, 4 Gb/s, or 2 Gb/s; however, the transceiver must also be capable of delivering at
this rate.
The SFP+ 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. For information about installing and removing SFP+ optical
transceivers, see

Port types

The 8/20q Fibre Channel Switch supports generic ports (G_Port, GL_Port), fabric ports (F_Port, FL_Port),
and expansion ports (E_Port). Switches come from the factory with all Fibre Channel ports configured as
GL_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 8/20q Fibre Channel Switches. The 8/20q
Fibre Channel Switch self-discovers all inter-switch connections. For more information, see
switch fabrics" on page 21.

Ethernet port

The Ethernet port is an RJ-45 connector that provides a connection to a workstation through a 10/100
Base-T Ethernet cable
configure and manage the switch fabric. An Ethernet connection to the switch is required to manage the
switch using the CLI, QuickTools, Simple SAN Connection Manager, or Simple Network Management
Protocol (SNMP).
The Ethernet port has two LEDs: the Link Status LED (green) and the Activity LED (green). The Link Status LED
illuminates continuously when an Ethernet connection has been established. The Activity LED illuminates
when data is being transmitted or received over the Ethernet connection.
1 Activity LED
3 RJ-45 Ethernet port
Figure 5

Ethernet port

"Install the transceivers" on page 33.
(Figure 5). A workstation can be a Windows or a Linux server that is used to
1 2
3
2 Link status LED
8/20q Fibre Channel Switch installation and reference guide
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