HP StorageWorks 2.140 Director Switch - Manual (Page 121)

Configuring the Director
119 Director Element Manager User Guide
Switch Parameters
Configure the following parameters as required by your fabric.
Domain ID
The domain identification is a value between 1 and 31 that provides a unique
identification for the switch in a fabric. A fabric switch cannot contain the same
domain ID as another switch or their E_Ports will segment when they try to join.
In the Configure Switch Parameters dialog box, a field is provided to enter a
preferred domain ID and a check box is provided to enable this ID as an insistent
domain ID.
Preferred
Note: To change this value, you must first set the director offline. Be sure to set the
director back online after you change this value.
Use this field to set the a unique domain ID for the director. The default value is 1.
Set a value between 1 and 31. When a switch comes online with a preferred ID, it
requests an ID from the fabric’s principal switch (indicating its preferred value as
part of the request). If the requested domain ID is not allocated to the fabric, the
domain ID is assigned to the requesting director or switch. If the requested
domain ID is already allocated, an unused domain ID is assigned. You must set the
switch or director offline before you can change the preferred domain ID.
The preferred domain ID must be unique for each director and switch in a fabric.
If two directors or directors have the same preferred domain ID, the E_Ports
segment, causing the fabric to segment.
For more information on domain ID, refer to the section on domain ID assignment
for multiswitch fabrics in the HP StorageWorks SAN High Availability Planning
Guide for details.
Insistent
This option is not operational unless the SANtegrity Binding feature is installed.
Click the check box to remove or add a check mark. The default state is disabled
(no check mark).
When a check mark displays, the domain ID configured in the Preferred Domain
ID field will become the active domain identification when the fabric initializes.
See the following notes: