Congestion Management Configuration; Congestion Management Overview - HP 4800G Series Configuration Manual

Table of Contents

Congestion Management Configuration

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

interested in:

Congestion Management Configuration Approaches

Configuring 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 5-1 Traffic congestion causes

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.

Congestion Management Policies

In general, congestion management uses queuing technology. The system uses a certain queuing

algorithm for traffic classification, and then uses a certain precedence algorithm to send the traffic. Each

（100M+10M+50M）>100M

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