Congestion Management Configuration; Congestion Management Overview; Causes, Impacts, And Countermeasures Of Congestion - H3C S7500E Series Configuration Manual

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Congestion Management Configuration

When configuring hardware congestion management, go to these sections for information you are
interested in:

Congestion Management Overview

Congestion Management Configuration Approaches
Per-Queue Hardware Congestion Management
Displaying and Maintaining Congestion Management
Congestion Management Overview

Causes, Impacts, and Countermeasures of Congestion

Network 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
in extra delay.
Congestion easily occurs in complex packet switching circumstances in the Internet. The following
figure shows two common cases:
Figure 6-1 Traffic congestion causes
100M
100M>10M
（1）
Congestion may bring these negative results:
Increased delay and jitter during packet transmission
Decreased network throughput and resource use efficiency
Network resource (memory in particular) exhaustion and even system breakdown
Congestion is unavoidable in switched networks and multi-user application environments. To improve
the service performance of your network, you must take some proper measures to address the
congestion issues.
The key to congestion management is how to define a dispatching policy for resources to decide the
order of forwarding packets when congestion occurs.
100M
10M
10M
50M
（100M+10M+50M）>100M
（2）
100M
6-1