ZyXEL Communications AMG1202-T10A, User Manual, Page: 160 / 296

Chapter 14 Quality of Service (QoS)
AMG1202-T10A User’s Guide
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• Use the QoS Settings Summary screen ( Section 14.2.1 on page 163 ) to check the summary of
QoS rules and actions you configured for the ZyXEL Device.
14.1.2 What You Need to Know About QoS
802.1p
QoS is used to prioritize source-to-destination traffic flows. All packets in the same flow are given
the same priority. 802.1p is a way of managing traffic in a network by grouping similar types of
traffic together and treating each type as a class. You can use 802.1p to give different priorities to
different packet types.
Tagging and Marking
In a QoS class, you can configure whether to add or change the DiffServ Code Point (DSCP) value,
IEEE 802.1p priority level and VLAN ID number in a matched packet. When the packet passes
through a compatible network, the networking device, such as a backbone switch, can provide
specific treatment or service based on the tag or marker.
Finding Out More
See Section 14.3 on page 164 for advanced technical information on QoS.
14.2 The QoS Screen
Use this screen to enable or disable QoS and have the ZyXEL Device assign priority levels to traffic
according to the port range, IEEE 802.1p priority level and/or IP precedence.