HP StorageWorks MSA1000 HP StorageWorks 2/8q Fibre Channel Switch Management V - Page 87

Port Type parameters, Interoperability Credits parameters, I/O Stream Guard parameters

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Switch Manager Port Type parameters The ports can be configured to self-discover the proper type to match the device or switch to which it is connected. Table 27 describes the port types. 1. Select one or more ports in the faceplate display. 2. Select Port > Port Properties. The Port Properties dialog box is displayed. 3. Click the Port Type option for the port type you want. 4. Click OK. Table 27: Port types State F_Port FL_Port G_Port GL_Port Donor 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. Generic loop port-Self discovers as an F_Port or an FL_Port. GL_Port is the default port type. A single device on a public loop attempts to configure as an F_Port first; if that fails it attempts to configure as an FL_Port. Donor port-Allows buffer credits to be used by another port. Interoperability Credits parameters Note: Interoperability Credits is not supported at this time. Switches negotiate with other switches to resolve differences in the number of port buffer credits. I/O Stream Guard parameters The I/O Stream Guard feature suppresses the generation of 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 suppress the generation of RSCN messages for the selected port, open the Port menu, and then click the Enable option in the I/O Stream Guard area of the Port Properties dialog box. Device Scan parameter The Device Scan feature queries the connected device during login for FC-4 descriptor information. Disable this parameter only if the scan creates a conflict with the connected device. Changing the port symbolic name To change the symbolic name of a port from the faceplate display: 1. Open the faceplate display and then select a port. 2. Select Port > Port Symbolic Name. The Port Symbolic Name dialog box is displayed. HP StorageWorks 2/8q Fibre Channel Switch Management User Guide 87

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Switch Manager
87
HP StorageWorks 2/8q Fibre Channel Switch Management User Guide
Port Type parameters
The ports can be configured to self-discover the proper type to match the device or switch to
which it is connected.
Table 27
describes the port types.
1.
Select one or more ports in the faceplate display.
2.
Select
Port > Port Properties
. The Port Properties dialog box is displayed.
3.
Click the
Port Type
option for the port type you want.
4.
Click
OK
.
Interoperability Credits parameters
Note:
Interoperability Credits is not supported at this time.
Switches negotiate with other switches to resolve differences in the number of port buffer
credits.
I/O Stream Guard parameters
The I/O Stream Guard feature suppresses the generation of 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 suppress the generation of RSCN messages for the selected port, open the
Port
menu, and
then click the
Enable
option in the I/O Stream Guard area of the Port Properties dialog box.
Device Scan parameter
The Device Scan feature queries the connected device during login for FC-4 descriptor
information. Disable this parameter only if the scan creates a conflict with the connected
device.
Changing the port symbolic name
To change the symbolic name of a port from the faceplate display:
1.
Open the faceplate display and then select a port.
2.
Select
Port > Port Symbolic Name
. The Port Symbolic Name dialog box is displayed.
Table 27:
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.
GL_Port
Generic loop port—Self discovers as an F_Port or an FL_Port. GL_Port
is the default port type. A single device on a public loop attempts to
configure as an F_Port first; if that fails it attempts to configure as an
FL_Port.
Donor
Donor port—Allows buffer credits to be used by another port.