Dell Brocade G620 Brocade 8.0.1 Fabric OS Administratiors Guide - Page 332
Zone merging, unchanged after the merge.
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Administering Advanced Zoning All zones should use frame-based hardware enforcement; the best way to do this is to use WWN identification exclusively for all zoning configurations. Zone merging When a new switch is added to the fabric, it automatically takes on the zone configuration information from the fabric. You can verify the zone configuration on the switch using the procedure described in Viewing the configuration in the effective zone database on page 328. If you are adding a switch that is already configured for zoning, clear the zone configuration on that switch before connecting it to the zoned fabric. Refer to Clearing all zone configurations on page 328 for instructions. Adding a new fabric that has no zone configuration information to an existing fabric is very similar to adding a new switch. All switches in the new fabric inherit the zone configuration data. If the existing fabric has an effective zone configuration, then the same configuration becomes the effective configuration for the new switches. Before the new fabric can merge successfully, it must pass the following criteria: ∙ Before merging - To facilitate merging, check the following before merging switches or fabrics: - Defaultzone: The switches must adhere to the default zone merge rules, as described in Zone merging scenarios on page 333. - Effective and defined zone configuration match : Ensure that the effective and defined zone configurations match. If they do not match, and you merge with another switch, the merge may be successful, but unpredictable zoning and routing behavior can occur. ∙ Merging and segmentation The fabric is checked for segmentation during power-up, when a switch is disabled or enabled, or when a new switch is added. The zone configuration database is stored in nonvolatile memory by the cfgSave command. All switches in the fabric have a copy of this database. When a change is made to the defined configuration, the switch where the changes were made must close its transaction for the changes to be propagated throughout the fabric. If you have implemented default zoning, you must set the switch you are adding into the fabric to the same default zone mode setting as the rest of the fabric to avoid segmentation. ∙ Merging rules - Observe these rules when merging zones: - Local and adjacent configurations: If the local and adjacent zone database configurations are the same, they will remain unchanged after the merge. - Effective configurations: If there is an effective configuration between two switches, the effective zone configurations must match. - Zone object naming: If a zoning object has the same name in both the local and adjacent defined configurations, the object types and member lists must match. When comparing member lists, the content and order of the members are important. - Objects in adjacent configurations: If a zoning object appears in an adjacent defined configuration, but not in the local defined configuration, the zoning object is added to the local defined configuration. The modified zone database must fit in the nonvolatile memory area allotted for the zone database. - Local configuration modification: If a local defined configuration is modified because of a merge, the new zone database is propagated to other the switches within the merge request. - TI zones: If there is an effective configuration between two switches and TI zones are present on either switch, the TI zones are not automatically activated after the merge. Check the TI zone enabled status using the zone --show command, and if the status does not match across switches, issue the cfgEnable command. ∙ Merging two fabrics Brocade Fabric OS Administration Guide, 8.0.1 332 53-1004111-02
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