H3C S5820X Series Configuration Manual

Also see for s5800 series: Installation manual Instruction manual Command reference Quick start Troubleshooting guide

Contents

H3C S5820X Series Configuration Manual Manual pdf 57 page image

6-16 Congestion Management ConfigurationThis chapter includes these sections: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, resultingin extra delay.Congestion easily occurs in complex packet switching circumstances in the Internet. The followingfigure shows two common cases:Figure 6-1 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 usagez Network resource exhaustion (especially memory) 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.