If your network is live, make sure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. This document is not restricted to specific software and hardware versions. For more information, see IP Addressing and Subnetting for New Users. Readers of this document should have basic knowledge of IP routing. For more information about the commands, see the Router Products Command Reference. It also explains of some of the ISDN configuration commands. This document provides a sample configuration for basic ISDN.
