HP Surestore 64 FW 05.01.00 and SW 07.01.00 HP StorageWorks SAN High Availabil - Page 141
Enterprise Fabric Mode
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Physical Planning Considerations ■ 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. SAN High Availability Planning Guide 141