Netgear XCM8806 - 8800 SERIES 6-SLOT CHASSIS SWITCH ユーザーズマニュアル

queues and QoS profiles is forwarded to the egress port rate-shaping feature, which applies 
QoS to the entire port. When multiple QoS profiles are contending for egress bandwidth, the 
scheduler determines which queues are serviced.

The following sections provide more information on QoS:

•     Applications and Types of QoS 

•     Traffic Groups 

•     Introduction to Rate Limiting, Rate Shaping, and Scheduling 

•     Meters 

•     QoS Profiles 

•     Multicast Traffic Queues 

•     Egress Port Rate Limiting and Rate Shaping 

Applications and Types of QoS

Different applications have different QoS requirements. 

 summarizes the QoS 

guidelines for different types of network traffic.

Consider the guidelines in 

 as general guidelines and not as strict 

recommendations. After QoS parameters have been set, you can monitor the performance of 
the application to determine if the actual behavior of the applications matches your 
expectations. It is very important to understand the needs and behavior of the particular 
applications you want to protect or limit. Behavioral aspects to consider include bandwidth 
needs, sensitivity to latency and jitter, and sensitivity and impact of packet loss.

Full-duplex links should be used when deploying policy-based QoS. 

Half-duplex operation on links can make delivery of guaranteed 
minimum bandwidth impossible.

The following sections provide more information on the traffic types listed in 

Voice

Minimum bandwidth, priority

Video

Minimum bandwidth, priority, buffering (varies)

Database

Minimum bandwidth

Web browsing

Minimum bandwidth for critical applications, maximum bandwidth for noncritical 
applications

File server

Minimum bandwidth