director 2/64 installation guide

director 2/64 installation guide 2–47
Installing and Configuring the Director 2/64
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
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
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 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.
Director Speed
At the Director Speed field, choose 1 Gb/sec or 2 Gb/sec to select the speed of Fibre
Channel operation.