Set Preferred Loop Id - IBM System Storage DS3500 Introduction And Implementation Manual

Draft Document for Review March 28, 2011 12:24 pm

10.5 Set preferred loop ID

Loop ID is unique ID of a port in fibre-channel loop topology, sometimes is referred as a loop
address. The Preferred Loop ID menu is not available for DS3500 without FC daughter card
installed.
Attention: If your Fibre Channel host adapter driver manages storage subsystems based
on a loop ID (or arbitrated loop physical address - AL_PA), do not change the value of the
preferred loop ID. We do not recommend to change this setting at all, if you do not have
any special reason to do it.
Select the controller in the Physical pane, right click, and select Preferred Loop ID in the
menu. A list of FC ports is in a new window (Figure 10-14).
Figure 10-14 FC ports - Loop ID
Select the line with port you want to change, and if you press the button "Change Preferred
ID" at the bottom of the window, another new window appears (Figure 10-15).
Figure 10-15 Loop ID setting
One of these three options can be selected:
Normal (0-125) – This option assigns a normal preferred loop ID value to the controller port.
Select a value from the spinner box. If the controller port currently has a preferred loop ID
between 0 and 125, this radio button is selected by default. The current ID is shown in the
spinner box.
N-port only (126) – This option configures only the controller host interface as a
point-to-point connection. This option forces the controller to operate as an N_Port, which
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Chapter 10. Administration - Physical Tab
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