Multiple Table Relationship Design

[neo651]

I have a database with 17 different devices that have IP addresses. I want to manage these IPs with a single table. I want the table to display the IP Address and the device its associated to, but DeviceID are only unique within the tables. How do I create a reference that is unique to any device across all 17 devices?

Thank you.

[goodguy]

Make one table called tblDevices with DeviceID as primary key.
Make another table called tblIPAddresses with IPAddress as primary key.
Make a third table called tblDeviceIPAddresses that has both PKs as FKs.