Owner manual

4. Click OK to write the new port type to the switch.

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 Table 23 for the possible port speeds.

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 22 Port types

State Description

F_Port Fabric port—Supports a single public device (N_Port).

FL_Port Fabric loop port—Self-discovers a single device (N_Port) or a loop of up to 126 public

devices (NL_Port).

G_Port Generic port—Self-discovers as an F_Port or an E_Port.

GL_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.

E_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.

TR_Port 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 ports” (page 96)).

Donor Donor port—Allows buffer credits to be used by another port.

Table 23 Port speeds

State Description

Auto-Detect Matches the transmission speed of the connected device.

This is the default.

1 Gb/s Fixed 1 Gb/s transmission speed

2 Gb/s Fixed 2 Gb/s transmission speed

4 Gb/s Fixed 4 Gb/s transmission speed

8 Gb/s Fixed 8 Gb/s transmission speed