Insistent; Rerouting Delay; Domain Rscns - HP StorageWorks Director 2/140 Installation Manual

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domain ID is already allocated, an unused domain ID is assigned. Note that you must set the
director offline before you can change to the preferred domain ID.
The preferred domain ID must be unique for each director and switch in a fabric. If two switches 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 multi-switch
fabrics in the planning guide.

Insistent

This option is not supported unless the SANtegrity Binding feature is installed. Click the check box to
enable or disable this feature. The default state is disabled (no check).
When you select Insistent, the domain ID configured in the Preferred Domain ID box becomes the
active domain identification when the fabric initializes.
This option is required if Enterprise Fabric Mode (optional SANtegrity Binding feature) is
enabled.
If you enable Insistent Domain while the switch or director is online, the Preferred Domain ID will
change to the current active domain ID if the IDs are different.
CAUTION:
If a director with a duplicate domain ID exists in the fabric, both directors' E_Ports will
segment when they try to join.

Rerouting delay

The Rerouting Delay option is only applicable if the configured director is in a multi-switch fabric.
Enabling rerouting delay ensures that frames are delivered in order through the fabric to their
destination. If there is a change to the fabric topology that creates a new path (for example, a new
director is added to the fabric), frames may be routed over this new path if its hop count is less than
a previous path with a minimum hop count. This may result in frames being delivered to a
destination out of order since frames sent over the new, shorter path may arrive ahead of older
frames still in route over the older path.
If rerouting delay is enabled, traffic ceases in the fabric for the time specified in the E_D_TOV box of
the Configure Fabric Parameters dialog box. This delay allows frames sent on the old path to exit to
their destination before new frames begin traversing the new path.
NOTE:
This option is required if Enterprise Fabric Mode (optional SANtegrity Binding feature) is
enabled. The default state is enabled.

Domain RSCNs

Domain register for state change notifications (domain RSCNs) are sent between end devices in a
fabric to provide additional connection information to host bus adapters (HBA) and storage devices.
As an example, this information might indicate that a logical path has been broken because of a
physical event, such as a fiber optic cable being disconnected from a port. Consult with your HBA
54
Installing and configuring the director

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