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5 – Managing Ports

 

 

Configuring Ports

 

 

 

 

5.2.3

Changing Port Types

The ports can be configured to self-discover the proper type to match the device or switch to which it is connected. Table 5-9describes the port types. To change the port type, do the following:

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.

3.Click the Port Type radio button for the port type you want.

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

 

Table 5-9. 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 will

 

attempt to configure as an F_Port first, then if that fails, as an FL_Port.

Donor

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

 

 

5.2.4

I/O Stream Guard

The I/O Stream Guard feature suppresses the Registered State Change Notification (RSCN) messages on a port basis. I/O Stream Guard should be enabled only on ports connected to initiator devices. To configure the I/O Stream Guard option using the Port Properties dialog, open the Port menu, and select Port Properties. Click the radio button that corresponds to one of the following options:

„Enable: Suppresses the reception of RSCN messages from other ports for which I/O Stream Guard is enabled.

„Disable: Allows free transmission and reception of RSCN messages.

„Auto: Suppresses the reception of RSCN messages when the port is connected to an initiator device with a QLogic HBA. For older QLogic HBAs, such as the QLA2200, Device Scan must be enabled. The default is Auto.

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Q-Logic 59022-11 A 4-13, SANBOX2-16 manual Changing Port Types, Stream Guard