HP StorageWorks Fabric OS 6.1.x administrator guide (5697-0234, November 2009)

222 Administering Advanced Zoning
followed by a portDisable or portEnable command on one of the ISL ports that connects the fabrics.
This will cause a merge, making the fabric consistent with the correct configuration.
IMPORTANT: Be careful using the cfgClear command because it deletes the defined configuration..