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# Change preferred interface for a NAS server

Network-attached storage is a file-level storage architecture that makes stored data more accessible to networked devices.

## About this task

See Understanding PowerMax File for storage systems for an overview of PowerMax File.

This control is also available from the NAS Server All Details > Network > File Interface tab.

## Steps

1. Select a storage system that supports PowerMax File.
2. Select Storage > File.
3. Select the NAS SERVERS tab.
4. Select a server, click , and select Change Preferred Interface.
5. Modify the values for the IPv4 or IPv6 production and backup IP interfaces.
6. Click OK.