ZyXEL Communications P-660RU-T1 v3, User Manual, Page: 100 / 230

Chapter 11 Quality of Service (QoS)
P-660RU-Tx v3 User’s Guide
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11.1.1 What You Can Do in the QoS Screens
• Use the QoS screen ( Section 11.2 on page 101 ) to configure QoS settings on the ZyXEL
Device.
• Use the QoS Settings Summary screen ( Section 11.2.1 on page 103 ) to check the
summary of QoS rules and actions you configured for the ZyXEL Device.
11.1.2 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 11.3 on page 104 for advanced technical information on QoS.