5-15 Congestion Management ConfigurationWhen configuring hardware congestion management, go to these sections for information you areinterested in:z Congestion Management Overviewz Congestion Management Configuration Approachesz Configuring Congestion Managementz Displaying and Maintaining Congestion ManagementCongestion Management OverviewCauses, Impacts, and Countermeasures of CongestionNetwork congestion is a major factor contributed to service quality degrading on a traditional network.Congestion is a situation where the forwarding rate decreases due to insufficient resources, resulting inextra delay.Congestion easily occurs in complex packet switching circumstances in the Internet. The followingfigure shows two common cases:Figure 5-1 Traffic congestion causes100M>10M（100M+10M+50M）>100M100M100M100M50M10M10M（1） （2）Congestion may bring these negative results:z Increased delay and jitter during packet transmissionz Decreased network throughput and resource use efficiencyz Network resource (memory in particular) exhaustion and even system breakdownCongestion is unavoidable in switched networks and multi-user application environments. To improvethe service performance of your network, you must take some proper measures to address thecongestion issues.The key to congestion management is how to define a dispatching policy for resources to decide theorder of forwarding packets when congestion occurs.Congestion Management PoliciesIn general, congestion management uses queuing technology. The system uses a certain queuingalgorithm for traffic classification, and then uses a certain precedence algorithm to send the traffic. Each
