VES-1616F-3x Series User’s Guide
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H A P T E R
19
Policy
This chapter shows you how to configure policy rules.
19.1 Policy Overview
A classifier distinguishes traffic into flows based on the configured criteria (refer to
for more information). A policy rule ensures that a traffic flow gets the
requested treatment in the network.
19.1.1 DiffServ
DiffServ (Differentiated Services) is a class of service (CoS) model that marks packets so that
they receive specific per-hop treatment at DiffServ-compliant network devices along the route
based on the application types and traffic flow. Packets are marked with DiffServ Code Points
(DSCPs) indicating the level of 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.
19.1.2 DSCP and Per-Hop Behavior
DiffServ defines a new DS (Differentiated Services) 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.
Содержание VDSL SWITCH VES-1616F-3X
Страница 1: ...www zyxel com VES 1616F 3x Series VDSL Switch User s Guide Version 3 60 5 2007 Edition 2 ...
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Страница 7: ...Safety Warnings VES 1616F 3x Series User s Guide 7 ...
Страница 8: ...Safety Warnings VES 1616F 3x Series User s Guide 8 ...
Страница 28: ...List of Tables VES 1616F 3x Series User s Guide 28 ...
Страница 29: ...29 PART I Introduction Getting to Know Your Switch 31 Hardware Installation 35 Hardware Overview 37 ...
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Страница 34: ...Chapter 1 Getting to Know Your Switch VES 1616F 3x Series User s Guide 34 ...
Страница 42: ...Chapter 3 Hardware Overview VES 1616F 3x Series User s Guide 42 ...
Страница 43: ...43 PART II Status and Basic The Web Configurator 45 System Status and Port Statistics 53 Basic Setting 63 ...
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Страница 62: ...Chapter 5 System Status and Port Statistics VES 1616F 3x Series User s Guide 62 ...
Страница 84: ...Chapter 6 Basic Setting VES 1616F 3x Series User s Guide 84 ...
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Страница 94: ...Chapter 7 VLAN VES 1616F 3x Series User s Guide 94 Figure 33 Port Based VLAN Setup All Connected ...
Страница 106: ...Chapter 10 Spanning Tree Protocol VES 1616F 3x Series User s Guide 106 ...
Страница 120: ...Chapter 15 Port Authentication VES 1616F 3x Series User s Guide 120 ...
Страница 126: ...Chapter 17 Queuing Method VES 1616F 3x Series User s Guide 126 ...
Страница 131: ...Chapter 18 Classifier VES 1616F 3x Series User s Guide 131 Figure 51 Classifier Example ...
Страница 132: ...Chapter 18 Classifier VES 1616F 3x Series User s Guide 132 ...
Страница 138: ...Chapter 19 Policy VES 1616F 3x Series User s Guide 138 Figure 53 Policy Example ...
Страница 144: ...Chapter 20 VLAN Stacking VES 1616F 3x Series User s Guide 144 ...
Страница 155: ...Chapter 21 Multicast VES 1616F 3x Series User s Guide 155 Figure 65 MVR Group Configuration Example ...
Страница 156: ...Chapter 21 Multicast VES 1616F 3x Series User s Guide 156 ...
Страница 160: ...Chapter 22 Differentiated Services VES 1616F 3x Series User s Guide 160 ...
Страница 161: ...161 PART IV Routing Protocol Static Route 163 DHCP Relay 165 ...
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Страница 168: ...168 ...
Страница 178: ...Chapter 25 Maintenance VES 1616F 3x Series User s Guide 178 ...
Страница 192: ...Chapter 27 Diagnostic VES 1616F 3x Series User s Guide 192 ...
Страница 196: ...Chapter 28 Syslog VES 1616F 3x Series User s Guide 196 ...
Страница 202: ...Chapter 29 Cluster Management VES 1616F 3x Series User s Guide 202 ...
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Страница 242: ...Chapter 32 Introducing the Commands VES 1616F 3x Series User s Guide 242 ...
Страница 266: ...Chapter 34 IEEE 802 1Q Tagged VLAN Commands VES 1616F 3x Series User s Guide 266 ...
Страница 274: ...Chapter 35 Troubleshooting VES 1616F 3x Series User s Guide 274 ...
Страница 282: ...Chapter 36 Product Specifications VES 1616F 3x Series User s Guide 282 ...
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Страница 298: ...Appendix B Legal Information VES 1616F 3x Series User s Guide 298 ...
Страница 310: ...Index VES 1616F 3x Series User s Guide 310 ...