HP StorageWorks 2.140 Director Switch - Manual (Page 192)

Optional features 192
The following features and parameters are enabled by the Enterprise Fabric Mode option:
• Fabric Binding—This SANtegrity Binding feature is enabled through the Fabrics menu in
HAFM. This feature allows or prohibits switches and directors from merging with a selected
fabric. See ” Enabling and disabling and on line state functions ” on page 191 for details on
enabling/disabling Fabric Binding with Enterprise Fabric Mode enabled.
• Switch Binding—This SANtegrity Binding feature is enabled through the Configure menu in
the Element Manage.r This feature allows or prohibits switches and/or directors from connecting
to switch E_Ports, and prohibits devices from connecting to F_Ports. See ” Enabling and disabling
and on line state functions ” on page 191 for details on enabling/disabling Switch Binding with
Enterprise Fabric Mode enabled.
• Rerouting Delay—This is a parameter in the Configure Switch Parameters dialog box,
available from the Configure menu in the Element Manager.
Rerouting Delay ensures that frames are delivered through the fabric in order 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 provided that 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 because frames sent over the new, shorter path may arrive ahead of
older frames still en 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 (Configure menu). This delay enables frames
sent on the old path to exit to their destination before new frames begin traversing the new path.
If Enterprise Fabric Mode is enabled, the Rerouting Delay option n is automatically enabled and
cannot be disabled unless the switch is off line. In this case, disabling Rerouting Delay also
disables Enterprise Fabric Mode.
• Domain RSCNs—This is a parameter in the Configure Switch Parameters dialog box,
available from the Configure menu in the Element Manager. Domain register for state change
notifications (domain RSCNs) are sent between end devices in a fabric to provide additional
connection information to 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.
If Enterprise Fabric Mode is enabled, this parameter is automatically enabled and cannot be
disabled unless the switch is off line. In this case, disabling Domain RSCNs also disables
Enterprise Fabric Mode.
• Suppress Zoning RSCNs on Zone Set Activations—Fabric format domain register for
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 Zoning 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 check mark.
This option is disabled (check box not selected) 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, 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