ZyXEL Communications P-660N-T1A, User Manual

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Chapter 14 Quality of Service (QoS)
P-660N-T1A User’s Guide
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these two classes are assigned priority queue based on the internal QoS mapping
table on the ZyXEL Device.
Figure 84 QoS Example
14.1.1 What You Can Do in the QoS Screens
• Use the QoS screen ( Section 14.2 on page 169 ) to configure QoS settings on
the ZyXEL Device.
• Use the QoS Settings Summary screen ( Section 14.2.1 on page 171 ) to check
the summary of QoS rules and actions you configured for the ZyXEL Device.
14.1.2 What You Need to Know
The following terms and concepts may help as you read this chapter.
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 172 for advanced technical information on QoS.
50 Mbps
DSL
VoIP: Queue 6
Boss: Queue 5
IP=192.168.1.23