ZyXEL Communications P-660HN-T1H User Manual

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Chapter 14 Quality of Service (QoS)
P-660HN-T1H 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 83   QoS Example
14.1.1  What You Can Do in the QoS Screens
• Use  the  QoS screen (
) to configure QoS settings on 
the ZyXEL Device.
• Use  the  QoS Settings Summary screen (
) 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 
 for advanced technical information on QoS.
50 Mbps
DSL
VoIP: Queue 6
Boss: Queue 5
IP=192.168.1.23