Domain Rscn's; Suppress Rscn's On Zone Set Activations - HP 316095-B21 Installation Manual

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.

Suppress RSCN's on zone set activations

Fabric format domain RSCNs are sent to ports on the Edge 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 Edge
Switch.
This option is disabled by default. In most cases this option should be disabled so that attached
devices can receive notification of zoning changes in the fabric. However, some HBAs may log out,
and then log back into the fabric when they receive an RSCN, thereby disrupting Fibre Channel
traffic. Consult with your HBA and storage device vendor to determine if disabling this option (and
thereby enabling RSCN transmission) will cause problems with your HBA or storage products.
52 Using HAFM to configure the Edge Switch