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

Planning Considerations for Fibre Channel Topologies

88 SAN High Availability Planning Guide

■ Zoning configurations for joined fabrics — In a multi-switch fabric, zoning

is configured on a fabric-wide basis, and any change to the active zone set is

applied to all directors and switches. To ensure zoning is consistent across a

fabric, the following rules are enforced when two fabrics (zoned or unzoned)

join through an ISL.

— Fabric A unzoned and Fabric B unzoned — The fabrics join

successfully, and the resulting fabric remains unzoned.

— Fabric A zoned and Fabric B unzoned — The fabrics join successfully,

and fabric B automatically inherits the zoning configuration from fabric

— Fabric A unzoned and Fabric B zoned — The fabrics join successfully,

and fabric A automatically inherits the zoning configuration from fabric

— Fabric A zoned and Fabric B zoned — The fabrics join successfully

only if the zone sets can be merged. If the fabrics cannot join, the

connecting E_Ports segment and the fabrics remain independent.

Zone sets for two directors or switches are compatible (the fabrics can join)

only if the zone names for each fabric element are unique. The zone names for

two fabric elements can be the same only if the zone member WWNs are

identical for each duplicated zone name.