> # Guidelines and Limitations

> Fabric merge does not modify the role database on a switch. If two fabrics merge, and the fabrics have different role databases, the software generates an alert message.

> See the "Merge Guidelines for RADIUS and TACACS+ Configurations" topic for detailed concepts.

> - Verify that the role database is identical on all switches in the entire fabric.
> - Be sure to edit the role database on any switch to the desired database and then commit it. This synchronizes the role databases on all the switches in the fabric.

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