McDATA Sphereon 4500 User Manual page 101

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:
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•
CAUTION
!
If a switch with a duplicate domain ID exists in the fabric, both
switches' E_Ports will segment when they try to join.
Rerouting Delay Placing a check mark in the check box to the left of the Rerouting Delay
option enables rerouting delay. This option is only applicable if the
configured switch is in a multiswitch fabric. The default state is
disabled.
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 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 field of the dialog box. This delay allows
frames sent on the old path to exit to their destination before new
frames begin traversing the new path.
Domain RSCNs Use this check box to enable Domain register for state change
notifications (domain RSCNs). 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 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. If Enterprise Fabric Mode is enabled, this
parameter is automatically enabled and cannot be disabled unless the
This option is required if Enterprise Fabric Mode (optional
SANtegrity feature) is enabled. Refer to
Identification (ID) on page 6-11 for details.
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.
Configuring the Switch
Insistent Domain
Configure Switch Parameters
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