Chapter 14 Quality of Service (QoS)
IAD User’s Guide
164
14.1.2 What You Need to Know
The following terms and concepts may help as you read through this chapter.
QoS versus Cos
QoS is used to prioritize source-to-destination traffic flows. All packets in the same
flow are given the same priority. CoS (class of service) 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 CoS to give different priorities to different packet types.
CoS technologies include IEEE 802.1p layer 2 tagging and DiffServ (Differentiated
Services or DS). IEEE 802.1p tagging makes use of three bits in the packet
header, while DiffServ is a new protocol and defines a new DS field, which replaces
the eight-bit ToS (Type of Service) field in the IP header.
Tagging and Marking
In a QoS class, you can configure whether to add or change the DSCP (DiffServ
Code Point) 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.
14.2 The QoS General Screen
Click Advanced > QoS to open the screen as shown next.
Summary of Contents for P-3202HN-Ba
Page 2: ......
Page 8: ...Safety Warnings IAD User s Guide 8...
Page 10: ...Contents Overview IAD User s Guide 10...
Page 18: ...Table of Contents IAD User s Guide 18...
Page 19: ...19 PART I User s Guide...
Page 20: ...20...
Page 28: ...Chapter 1 Introduction IAD User s Guide 28...
Page 39: ...39 PART II Technical Reference...
Page 40: ...40...
Page 50: ...Chapter 4 Status Screens IAD User s Guide 50...
Page 54: ...Chapter 5 Device Mode Screen IAD User s Guide 54...
Page 68: ...Chapter 7 LAN Setup IAD User s Guide 68...
Page 128: ...Chapter 10 Voice IAD User s Guide 128...
Page 158: ...Chapter 12 Firewalls IAD User s Guide 158...
Page 162: ...Chapter 13 Static Route IAD User s Guide 162...
Page 173: ...Chapter 14 Quality of Service QoS IAD User s Guide 173 Figure 81 QoS Class Example VoIP...
Page 174: ...Chapter 14 Quality of Service QoS IAD User s Guide 174 Figure 82 QoS Class Example Boss...
Page 182: ...Chapter 15 Dynamic DNS Setup IAD User s Guide 182...
Page 210: ...Chapter 17 Universal Plug and Play UPnP IAD User s Guide 210...
Page 214: ...Chapter 18 System IAD User s Guide 214...
Page 218: ...Chapter 19 Logs IAD User s Guide 218...
Page 224: ...Chapter 21 Diagnostic IAD User s Guide 224...
Page 230: ...Chapter 22 Troubleshooting IAD User s Guide 230...
Page 238: ...Chapter 23 Product Specifications IAD User s Guide 238...