> # Guidelines and Limitations

> This section explains the database merge guidelines for this feature.

> When merging two fabrics, follow these guidelines:

> - Be aware of the following merge conditions:
> - The merge protocol is not implemented for distribution of the fctimer values—you must manually merge the fctimer values when a fabric is merged.The per-VSAN fctimer configuration is distributed in the physical fabric.
> - The fctimer configuration is only applied to those switches containing the VSAN with a modified fctimer value.
> - The global fctimer values are not distributed.
> - Do not configure global timer values when distribution is enabled.

> Note The number of pending fctimer configuration operations cannot be more than 15. At that point, you must commit or abort the pending configurations before performing any more operations.

> For information about CFS merge support, refer to the Cisco MDS 9000 Family NX-OS System Management Configuration Guide.

> Copyright 2010-2015, Cisco Systems, Inc. All rights reserved.