24 Installation Guide (AA-RTDWE-TE, November 2005)

Table Of Contents

Edge Switch 2/24 installation guide 45

Insistent

This option is not supported unless the SANtegrity feature is installed. The default state is disabled

(no check mark).

When the check box is selected, the domain ID configured in the Preferred Domain ID box becomes

the active domain identification when the fabric initializes. See the following notes:

• This option is required if the SANtegrity is enabled.

• If you enable Insistent Domain while the Edge Switch or Director is online, the Preferred Domain

ID changes to the current active domain ID if the IDs are different.

CAUTION: If an Edge Switch with a duplicate domain ID exists in the fabric, both Edge Switch

E_Ports segment when they try to join.

Rerouting Delay

Selecting the Rerouting Delay check box enables rerouting delay. This option is applicable only if

the configured Edge Switch is in a multiswitch fabric. The default state is enabled.

Enabling the 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

Edge Switch 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 must be enabled if SANtegrity is enabled.

Domain RSCN’s

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 (HBAs) and storage

devices. As an example, this information might be 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

and storage device vendor to determine if enabling Domain RSCNs will cause problems with your

HBA or storage products. Note that this option must be enabled if Enterprise Fabric Mode (optional

SANtegrity Binding feature) is enabled.