Interlogix GE-DS-242-PoE - Manual (Page 106)

Chapter 4: Web-Based Management
102 GE-DS-242-PoE Managed Ethernet Switch User Manual
QoS Configuration
Understand QOS
Quality of Service (QoS) is an advanced traffic prioritization feature that allows
you to establish control over network traffic. QoS enables you to assign various
grades of network service 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:
 Control a wide variety of network traffic by:
 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.
The QoS page of the Switch contains three types of QoS mode - the CoS mode,
TOS mode or Port-based mode can be selected. Both the three mode rely on
predefined fields within the packet to determine the output queue.
 CoS / 802.1p Tag Priority Mode -The output queue assignment is
determined by the IEEE 802.1p VLAN priority tag.
 TOS / DSCP Mode - The output queue assignment is determined by the TOS
or DSCP field in the IP packets.
 Port-Based Priority Mode - Any packet received from the specify high
priority port will treated as a high priority packet.