HP StorageWorks 2.32 Edge Switch - Manual (Page 81)

Edge Switch Element Manager user guide 81
NOTE: This option is required if Enterprise Fabric Mode (optional SANtegrity Binding feature) is
enabled. See ” Configuring a preferred path ” on page 164 for details.
NOTE: If you enable Insistent Domain while the switch or director is on line, the Preferred Domain
ID will change to the current active domain ID (if the IDs are different).
CAUTION: If a switch with a duplicate domain ID exists in the fabric, the E_Ports on both switches
will segment when they try to join.
Rerouting delay
To enable rerouting delay, place a check mark in the Rerouting Delay check box. 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 a change to the fabric topology 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 that of a
previous path with a minimum hop count. This may result in frames being delivered to a destination
out of order because 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 Switch Fabric Parameters dialog box, as shown in Figure 22 on page 83. 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 (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. For example, some HBAs may log out, then log
back into the fabric when they receive an RSCN, thereby disrupting Fibre Channel traffic.
NOTE: This option is required if Enterprise Fabric Mode (optional SANtegrity Binding feature) is
enabled.