HP StorageWorks 4000/6000/8000 .HP StorageWorks SAN Design Reference Guide, Pa - Page 426

NOTE: When enabling a new configuration, HP strongly recommends that the fabric be quiesced. Zone membership should not be changed for devices that are actively performing I/O in a fabric. Once the new zoning is enabled, an RSCN is sent to all nodes that have been registered to receive the RSCN. The following sections provide information to help you successfully merge SAN fabrics: • Fabric segmentation errors, page 426 • Switch configuration parameters, page 426 • Independent fabric merge, page 427 • High-availability redundant fabric merge, page 427 Fabric segmentation errors The following errors can cause fabric segmentation: • Zone type mismatch The name of a zone object in one fabric is identical to the name of a different type of zone object in the other fabric. For example, an object name on fabric A must not be an alias or configuration name in fabric B; otherwise, the fabrics cannot merge. • Zone content mismatch The definition of a zone object in one fabric is different from its definition in the other fabric. If an alias, zone, or configuration name is the same on both fabric A and B, but the content or definition of the objects is different, the fabrics cannot merge. • Zone configuration mismatch Zoning is enabled for both fabrics, but the zone configurations are different. The fabrics cannot merge until the zone configuration is disabled for one of the fabrics. • Duplicate IDs Each switch in a fabric must have a unique domain ID; each switch in multiple fabrics of the SAN must also have a unique ID. For example, if fabric A has five switches with domain IDs 1 through 5, and fabric B has five switches with the same domain IDs, these two fabrics cannot merge until each switch in both fabrics has a unique domain ID. For port-level zoning, changing the domain IDs can disrupt device access. Port-level zones are based on the domain ID and port number. Switch configuration parameters Mismatched switch parameters can cause a SAN merger to fail. The configuration settings for all switches in the fabric must match, with the exception of the following parameters: • Switch name • IP address • Domain ID 426 Best practices