Port Speeds; Port Types - HP StorageWorks 8/20q User Manual

Table 22

Port types

State
F_Port
FL_Port
G_Port
GL_Port
E_Port
TR_Port
Donor

Port speeds

SFP ports with 8Gb SFPs installed are capable of transmitting and receiving at 2 Gb/s, 4 Gb/s, or
8 Gb/s. All ports can be configured for either a fixed transmission speed or to sense (auto-detect) the
transmission speed of the device to which it is connected. To display the speed of each port, open the View
menu and select View Port Speeds. See
NOTE: 8 Gb/s SFPs do not support 1 Gb/s speed. Setting a port to 1 Gb/s that has an 8 Gb/s SFP
installed, will down the port.
To change the port transmission speed:
1. Select one or more ports in the faceplate display.
2. Open the Port menu and select Port Properties to open the Port Properties dialog box.
3. Select the Port Speed option from the drop-down list.
4. Click OK to write the new port speed to the switch.
Table 23 Port speeds
State
Auto-Detect
1 Gb/s
2 Gb/s
4 Gb/s
8 Gb/s
96
Description
Fabric port—Supports a single public device (N_Port).
Fabric loop port—Self-discovers a single device (N_Port) or a loop of up to 126 public
devices (NL_Port).
Generic port—Self-discovers as an F_Port or an E_Port.
Generic loop port—Self-discovers as an F_Port, FL_Port, or an E_Port. GL_Port is the
default port type. A single device on a public loop attempts to configure as an F_Port
first, then if that fails, as an FL_Port.
Expansion port—The mode that a G_Port or GL_Port is in when attached by an ISL
(inter-switch link) to another fibre channel switch.
Transparent Router port—Allows devices on a remote fabric to be mapped to devices
on the local 8/20q Fibre Channel Switch fabric. TR_Ports do not support online port
diagnostics (see "Testing
Donor port—Allows buffer credits to be used by another port.
Table 23
Description
Matches the transmission speed of the connected device.
This is the default.
Fixed 1 Gb/s transmission speed
Fixed 2 Gb/s transmission speed
Fixed 4 Gb/s transmission speed
Fixed 8 Gb/s transmission speed
ports" (page 98)).
for the possible port speeds.