IP to ATM Class of Service Phase 1 Design Guide

Rapid growth in Internet and intranet deployment and usage has resulted in a major shift in both corporate and consumer computing paradigms. This shift has resulted in massive increases in demand for both higher volume of communication and for predictable performance for some existing and emerging applications. However, this demand has often left Internet service providers (ISPs) or intranets with insufficient network capacities to indiscriminately offer predictable performance to all of the traffic. Thus, it became necessary to differentiate among the traffic so that the applications or users requiring (and willing to pay for) predictable performance can be identified and granted the appropriate QoS. In response to this need, Cisco introduced in Cisco IOS Release 11.1 CC new QoS extensions to Cisco IOS software network services. This set of services enables a new “Intelligent Internet” business model wherein ISPs and intranets can generate profitable