HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.1.x administrator guide (5697 - Page 198

• Is available on 1, 2, 4, 8 and 10 Gbps platforms. • Ensures that the name server does not return any information to an unauthorized initiator in response to a name server query. • Is exclusively enforced through selective information presented to end nodes through the fabric Simple Name Server (SNS). When an initiator queries the name server for accessible devices in the fabric, the name server returns only those devices that are in the same zone as the initiator. Devices that are not part of the zone are not returned as accessible devices. Fabric OS uses hardware-enforced zoning (on a per-zone basis) whenever the fabric membership or zone configuration changes. The exact zoning methodology varies on different switch models. Table 55 shows various HP switch models, the hardware zoning methodology for each, and tips for best usage. Table 55 Enforcing hardware zoning Fabric type Brocade 2000-series Methodology Best practice Enable hardware-enforced zoning only on domain,port zones; WWN or mixed zones are not hardware-enforced. Any domain,port zone that overlaps a mixed or WWN zone is not hardware-enforced. Use domain,port identifiers. Do not identify a zone member by its WWN. An overlap occurs when a member specified by WWN is connected to a port in a domain,port zone. The domain,port zone loses its hardware enforcement even though a review of the zone configuration does not indicate it. 198 Administering Advanced Zoning