Changing the Preferred Loop ID of a Controller Host Interface Port

Use this option to change the preferred loop ID of the controller port used in a host interface connection. This is the only way to set the Preferred Loop ID for most fourth generation controllers that do not contain a hardware switch on the back of the controller enclosure. In addition, you can override or extend the hardware switch settings for fourth generation controllers that do contain a switch.

Important: This option is grayed out until you select a fibre channel host interface in the Host Interfaces table of the Controller Properties dialog.


How to Change the Preferred Loop ID of a Controller Port

1
From the Controller Properties dialog, select a fibre channel host interface in the Host Interfaces table, then select Change Preferred ID.

Result: The Change Preferred Loop ID dialog is displayed. The Preferred Loop ID currently displayed on the Controller Properties dialog for this controller port is shown.
2
Select one of the three radio buttons:

Normal (0-125) Use this option to assign a normal Preferred ID value to the controller port. Select a value from the spinner box.

If the controller port currently has a Preferred ID between 0 and 125, this radio button is selected by default, and the current ID is shown in the spinner box.

Caution: If your fibre channel host adapter driver manages devices based on Loop-ID (or AL_PA), selecting a Preferred ID value that is already in use by another device might result in data corruption.
N-port only (126) Use this option only to configure the controller host interface as a point-to-point connection.

Important: This forces the controller to operate as an N-port, disabling loop mode.

If the controller port currently has a Preferred ID of 126, this radio button is selected by default.
Set during loop initialization (127) Use this option to assign the controller port to accept any available address during loop initialization.

Caution: If your fibre channel host adapter driver manages devices based on Loop-ID (or AL_PA), selecting this option might result in data corruption.

If the controller port currently has a Preferred ID of 127, this radio button is selected by default.
3
Select OK.

Result: The Preferred Loop ID of the controller port is changed.