FW 05.01.00 and SW 07.01.00 HP StorageWorks SAN High Availability Planning Guide (AA-RS2DC-TE, June 2003)

Physical Planning Considerations
141SAN High Availability Planning Guide
■ Switch binding — Using the switch binding feature, an administrator allows
only specified devices and fabric elements to connect to specified director or
fabric switch ports. This provides security in environments that include a large
number of devices by ensuring that only the intended set of devices attaches to
a director or switch. This feature is managed through the Product Manager
application.
Enterprise Fabric Mode
Although Enterprise Fabric Mode is not a keyed feature, it is integral to
SANtegrity Binding operation. Enterprise Fabric Mode must be enabled through
the HAFM Manager application before fabric binding and switch binding can
operate. Enterprise Fabric Mode also enables the following parameters:
■ Rerouting delay — If a fabric topology changes, directors or switches
calculate a new least-cost data transfer path through a fabric, and routing
tables immediately implement that path. This may result in Fibre Channel
frames being delivered to a destination device out of order, because frames
transmitted over the new (shorter) path may arrive ahead of previously
transmitted frames that traverse the old (longer) path. When enabled, the
rerouting delay parameter ensures that frames are delivered through a fabric in
the correct order.
■ Domain RSCNs — Domain RSCNs provide connectivity information to all
HBAs and storage devices attached to a fabric. RSCNs are transmitted to all
registered device N_Ports attached to a fabric if either a fabric-wide event or
zoning configuration change occurs.
■ Insistent domain ID — When this parameter is enabled, the domain ID
configured as the preferred domain ID for a director or switch becomes the
active domain ID when the fabric initializes. A static and unique active
domain identification is required by the fabric binding feature because the
feature's fabric membership list identifies fabric elements by WWN and
domain ID. If a duplicate preferred domain ID is used, then insisted upon, a
warning occurs and the affected director or switch cannot be added to the
membership list.