Testing Techniques for Next-Generation IP Networks Application Note 
Size: 995 KB
Date: April 2000

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The long-term vision for ATM was that it would become a universal end-to-end networking technology, used in the core, enterprise, and desktop, to carry multimedia services. Now, it seems more likely that IP will adopt this role, and ATM will become a strategic technology used for applications such as the high-speed backbone in core networks. ATM is also likely to remain the technology of choice for implementing virtual LANs (VLANs) in the enterprise, using LANE and MPOA.

IP is emerging as the universal end-to-end layer-3 protocol, operating over a range of layer-2 technologies such as ATM, Gigabit Ethernet, and SONET/SDH. IP is starting to adopt some ATM-like characteristics such as wire-speed (hardware) routing and Class of Service (CoS) management. Advances in architecture and features are creating new test challenges for designers of IP equipment and networks.

This application note discusses recent advances in IP standards and outlines the test techniques required for three different applications:

• functional testing of a layer-2/layer-3 switching device
• CoS contract verification in an IP network
• interworking testing of an IP/ATM access device