Planet IGS-801T [89/120] Understand qos

User’s Manual of IGS-801M

4.8 Quality of Service

4.8.1 Understand QOS

Quality of Service (QoS) is an advanced traffic prioritization feature that allows you to establish control over network

ervice to different types of traffic, such as multi-media, video,

protocol-specific, time critical, and file-backup traffic.

QoS reduces bandwidth limitations, delay, loss, and jitter. It also provides increased reliability for delivery of your data and

allows you to prioritize certain applications across your network. You can define exactly how you want the switch to treat

selected applications and types of traffic.

You can use QoS on your system to:

• Classifying traffic based on packet attributes.

• Assigning priorities to traffic (for example, to set higher priorities to time-critical or business-critical applications).

• Applying security policy through traffic filtering.

• Provide predictable throughput for multimedia applications such as video conferencing or voice over IP by

minimizing delay and jitter.

• Improve performance for specific types of traffic and preserve performance as the amount of traffic grows.

• Reduce the need to constantly add bandwidth to the network.

• Manage network congestion.

4.8.2 QoS Configuratio

he QoS Configuration page contains fields for enabling or disabling QoS. In addition, the 802.1p mode or DSCP mode

on predefined fields within the packet to determine the output queue. The QoS

Configuration page in Figure 4-8-1 appears.

traffic. QoS enables you to assign various grades of network s

can be selected. Both the two mode rely

Figure 4-8-1 QoS Configuration screen