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DSCP and Per-Hop Behavior

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Chapter 15 Quality of Service (QoS) service desired. This allows the intermediary DiffServ-compliant network devices to handle the packets differently depending on the code points without the need to negotiate paths or remember state information for every flow. In addition, applications do not have to request a particular service or give advanced notice of where the traffic is going. DSCP and Per-Hop Behavior DiffServ defines a new Differentiated Services (DS) field to replace the Type of Service (TOS) field in the IP header. The DS field contains a 2-bit unused field and a 6-bit DSCP field which can define up to 64 service levels. The following figure illustrates the DS field. DSCP is backward compatible with the three precedence bits in the ToS octet so that non-DiffServ compliant, ToS-enabled network device will not conflict with the DSCP mapping. DSCP (6 bits) Unused (2 bits) The DSCP value determines the forwarding behavior, the PHB (Per-Hop Behavior), that each packet gets across the DiffServ network. Based on the marking rule, different kinds of traffic can be marked for different kinds of forwarding. Resources can then be allocated according to the DSCP values and the configured policies. 176 P-870H/HW Series User's Guide

Section	Page
P-870H/HW Series	1
About This User's Guide	3
Document Conventions	5
Safety Warnings	7
Contents Overview	9
Table of Contents	11
User’s Guide	19
Introducing the ZyXEL Device	21
1.1 Overview	21
1.2 Ways to Manage the ZyXEL Device	21
1.3 Good Habits for Managing the ZyXEL Device	22
1.4 Applications for the ZyXEL Device	22
1.4.1 Internet Access	22
1.5 LEDs (Lights)	24
1.6 The RESET Button	25
1.6.1 Using the Reset Button	26
1.7 The WPS WLAN Button (P-870HW Series only)	26
1.7.1 Turn the Wireless LAN Off or On	26
1.7.2 Activate WPS	26
Tutorials	27
2.1 How to Set up a Wireless Network	27
2.1.1 Example Parameters	27
2.1.2 Configuring the AP	27
2.1.3 Configuring the Wireless Client	30
Introducing the Web Configurator	37
3.1 Web Configurator Overview	37
3.1.1 Accessing the Web Configurator	37
3.2 Web Configurator Main Screen	38
3.2.1 Navigation Panel	39
3.2.2 Main Window	41
3.2.3 Status Bar	41
Status Screens	43
4.1 Status Screen	43
4.1.1 WAN Service Statistics	47
4.1.2 Route Info	48
4.1.3 WLAN Station List	49
4.1.4 LAN Statistics	50
4.1.5 Client List	51
Technical Reference	53
WAN Setup	55
5.1 Overview	55
5.1.1 What You Can Do in this Chapter	55
5.2 What You Need to Know	56
5.3 Before You Begin	56
5.4 The Layer 2 Interface Screen	56
5.4.1 Layer 2 Interface Configuration	58
5.5 The Internet Connection Screen	59
5.5.1 WAN Connection Configuration	60
5.6 Technical Reference	71
LAN Setup	77
6.1 Overview	77
6.1.1 What You Can Do in this Chapter	77
6.2 What You Need To Know	78
6.3 The LAN IP Screen	79
6.4 Technical Reference	81
Wireless LAN	85
7.1 Overview	85
7.1.1 What You Can Do in this Chapter	85
7.2 What You Need to Know	86
7.3 Before You Begin	88
7.4 The General Screen	89
7.4.1 No Security	90
7.4.2 WEP Encryption	91
7.4.3 WPA(2)-PSK	93
7.4.4 WPA(2) Authentication	94
7.4.5 MAC Filter	95
7.4.6 Adding a New MAC Filtering Rule	97
7.5 The More AP Screen	97
7.5.1 More AP Edit	98
7.6 The WPS Screen	98
7.7 The WPS Station Screen	100
7.8 The WDS Screen	101
7.9 The Advanced Setup Screen	103
7.10 Technical Reference	105
7.10.1 Wireless Network Overview	105
7.10.2 Additional Wireless Terms	106
7.10.3 Wireless Security Overview	106
7.10.4 WiFi Protected Setup	109
Network Address Translation (NAT)	117
8.1 Overview	117
8.1.1 What You Can Do in this Chapter	117
8.2 What You Need to Know	117
8.3 The Port Forwarding Screen	118
8.3.1 The Port Forwarding Edit Screen	120
8.4 The Address Mapping Screen	121
8.4.1 The Address Mapping Rule Edit Screen	123
8.5 The Trigger Port Screen	124
8.5.1 Trigger Port Configuration	126
8.6 The DMZ Host Screen	128
8.7 The ALG Screen	128
8.8 Technical Reference	129
MAC Filter	131
9.1 Overview	131
9.1.1 What You Can Do in this Chapter	131
9.2 The MAC Filter Screen	131
9.2.1 Creating MAC Filtering Rules	133
Firewall	135
10.1 Overview	135
10.1.1 What You Can Do in this Chapter	135
10.2 What You Need to Know	135
10.3 The Firewall Screen	136
10.3.1 Creating Incoming Firewall Rules	138
Certificate	141
11.1 Overview	141
11.1.1 What You Can Do in this Chapter	141
11.2 What You Need to Know	141
11.3 The Local Certificates Screen	142
11.3.1 Create Certificate Request	143
11.3.2 Import Certificate	144
11.3.3 Certificate Details	146
11.3.4 Load Signed Certificate	148
11.4 The Trusted CA Screen	149
11.4.1 View Trusted CA Certificate	151
11.4.2 Import Trusted CA Certificate	152
Static Route	153
12.1 Overview	153
12.1.1 What You Can Do in this Chapter	153
12.2 The Static Route Screen	154
12.2.1 Static Route Edit	155
Policy Forwarding	157
13.1 Overview	157
13.1.1 What You Can Do in this Chapter	157
13.2 The Static Route Screen	157
13.2.1 Policy Forwarding Setup	158
RIP	161
14.1 Overview	161
14.1.1 What You Can Do in this Chapter	161
14.2 The RIP Screen	161
Quality of Service (QoS)	163
15.1 Overview	163
15.1.1 What You Can Do in this Chapter	163
15.2 What You Need to Know	164
15.3 The Quality of Service General Screen	164
15.4 The Queue Setup Screen	166
15.4.1 Adding a QoS Queue	167
15.5 The Class Setup Screen	168
15.5.1 QoS Class Edit	170
15.6 The QoS Monitor Screen	174
15.7 Technical Reference	175
Dynamic DNS Setup	177
16.1 Overview	177
16.1.1 What You Can Do in this Chapter	177
16.2 What You Need To Know	177
16.3 The Dynamic DNS Screen	178
Remote Management	179
17.1 Overview	179
17.1.1 What You Can Do in this Chapter	179
17.2 The TR-069 Screen	179
17.3 The TR-064 Screen	181
17.4 The Service Control Screen	182
17.5 The IP Address Screen	183
17.5.1 Adding an IP Address	184
Universal Plug-and-Play (UPnP)	185
18.1 Overview	185
18.1.1 What You Can Do in this Chapter	185
18.2 What You Need to Know	185
18.3 The UPnP Screen	186
18.4 Installing UPnP in Windows Example	187
18.5 Using UPnP in Windows XP Example	191
Parental Control	199
19.1 Overview	199
19.1.1 What You Can Do in this Chapter	199
19.2 The Time Restriction Screen	199
19.2.1 Adding a Schedule	200
19.3 The URL Filter Screen	201
19.3.1 Adding URL Filter	202
Interface Group	203
20.1 Overview	203
20.1.1 What You Can Do in this Chapter	203
20.2 The Interface Group Screen	203
20.2.1 Interface Group Configuration	204
20.2.2 Interface Grouping Criteria	206
System Settings	209
21.1 Overview	209
21.1.1 What You Can Do in this Chapter	209
21.2 The General Screen	209
21.3 The Time Setting Screen	210
Logs	213
22.1 Overview	213
22.1.1 What You Can Do in this Chapter	213
22.2 The View Log Screen	213
22.3 The Log Settings Screen	214
Tools	217
23.1 Overview	217
23.1.1 What You Can Do in this Chapter	217
23.2 The Firmware Screen	218
23.3 The Configuration Screen	220
23.4 The Restart Screen	222
Diagnostic	225
24.1 Overview	225
24.1.1 What You Can Do in this Chapter	225
24.2 What You Need to Know	225
24.3 The General Diagnostic Screen	226
24.4 The 802.1ag Screen	227
Troubleshooting	229
25.1 Power, Hardware Connections, and LEDs	229
25.2 ZyXEL Device Access and Login	230
25.3 Internet Access	231
Product Specifications	235
26.1 Hardware Specifications	235
26.2 Firmware Specifications	235
26.3 Wireless Features (for P-870HW Series only)	238
Setting Up Your Computer’s IP Address	241
Pop-up Windows, JavaScript and Java Permissions	271
IP Addresses and Subnetting	281
Wireless LANs	293
Common Services	309
Open Software Announcements	313
Legal Information	325

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Chapter 15 Quality of Service (QoS)

P-870H/HW Series User’s Guide

176

service desired. This allows the intermediary DiffServ-compliant network devices

to handle the packets differently depending on the code points without the need to

negotiate paths or remember state information for every flow. In addition,

applications do not have to request a particular service or give advanced notice of

where the traffic is going.

DSCP and Per-Hop Behavior

DiffServ defines a new Differentiated Services (DS) field to replace the Type of

Service (TOS) field in the IP header. The DS field contains a 2-bit unused field and

a 6-bit DSCP field which can define up to 64 service levels. The following figure

illustrates the DS field.

DSCP is backward compatible with the three precedence bits in the ToS octet so

that non-DiffServ compliant, ToS-enabled network device will not conflict with the

DSCP mapping.

The DSCP value determines the forwarding behavior, the PHB (Per-Hop Behavior),

that each packet gets across the DiffServ network. Based on the marking rule,

different kinds of traffic can be marked for different kinds of forwarding. Resources

can then be allocated according to the DSCP values and the configured policies.

DSCP (6 bits)

Unused (2 bits)