Installing and Configuring the Director 2/64
92
Director 2/64 Installation Guide
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 director is
in a multi-switch 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 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 field 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.
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 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 is required if Enterprise
Fabric Mode (optional SANtegrity binding feature) is enabled.
Suppress RSCN’s on zone set activations
Fabric format domain register for state change notifications (RSCNs) are sent to
ports on the switch following any change to the fabric's active zone set. These
changes include activating and deactivating the zone set, or enabling and
disabling the default zone. When the Suppress RSCNs on Zone Set Activations
check box is selected, fabric format RSCNs are not sent for zone changes to the
attached devices on the switch. Click the check box to remove or add a
checkmark.
