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P-870HW-I1 User’s Guide
Chapter 7 WAN
119
C
H A P T E R
7
WAN
This chapter describes how to configure outside connections to another network or the
Internet.
7.1 WAN Overview
7.1.1 Nailed-Up Connection (PPP)
A nailed-up connection is a dial-up line where the connection is always up regardless of traffic
demand. The ZyXEL Device does two things when you specify a nailed-up connection. The
first is that the idle timeout is disabled. The second is that the ZyXEL Device automatically
tries to bring up the connection when it is turned on or when the connection is down. Do not
set up a nailed-up connection unless your telephone company offers flat-rate service or you
need a constant connection and the cost is of no concern.
7.1.2 Metric
The metric represents the "cost of transmission". A router determines the best route for
transmission by choosing a path with the lowest "cost". RIP routing uses hop count as the
measurement of cost, with a minimum of "1" for directly connected networks. The number
must be between "1" and "15"; a number greater than "15" means the link is down. The
smaller the number, the lower the "cost".
The metric sets the priority for the ZyXEL Device’s routes to the Internet. If any two of the
default routes have the same metric, the ZyXEL Device uses the following pre-defined
priorities:
• Normal route: designated by the ISP (see
• Traffic-redirect route (see
For example, if the normal route has a metric of "1" and the traffic-redirect route has a metric
of "2", then the normal route acts as the primary default route. If the normal route fails to
connect to the Internet, the ZyXEL Device tries the traffic-redirect route next.
If you want the traffic-redirect route to take first priority over the normal route, set the traffic-
redirect’s route metric to "1" and the others to "2" (or greater).
IP Policy Routing overrides the default routing behavior and takes priority over all of the
routes mentioned above.
Содержание P-870HW-I Series
Страница 1: ...P 870HW I Series 802 11g Wireless VDSL2 4 port Gateway User s Guide Version 3 50 8 2006 Edition 1...
Страница 2: ......
Страница 7: ...P 870HW I1 User s Guide Safety Warnings 7 This product is recyclable Dispose of it properly...
Страница 30: ...P 870HW I1 User s Guide 30 List of Figures...
Страница 36: ...P 870HW I1 User s Guide 36 List of Tables...
Страница 46: ...P 870HW I1 User s Guide 46 Chapter 1 Getting To Know Your ZyXEL Device...
Страница 54: ...P 870HW I1 User s Guide 54 Chapter 2 Introducing the Web Configurator...
Страница 76: ...P 870HW I1 User s Guide 76 Chapter 3 Connection Wizard...
Страница 92: ...P 870HW I1 User s Guide 92 Chapter 5 Status Screen...
Страница 114: ...P 870HW I1 User s Guide 114 Chapter 6 Wireless LAN...
Страница 115: ...P 870HW I1 User s Guide Chapter 6 Wireless LAN 115...
Страница 116: ...P 870HW I1 User s Guide 116 Chapter 6 Wireless LAN...
Страница 117: ...P 870HW I1 User s Guide Chapter 6 Wireless LAN 117...
Страница 118: ...P 870HW I1 User s Guide 118 Chapter 6 Wireless LAN...
Страница 126: ...P 870HW I1 User s Guide 126 Chapter 7 WAN...
Страница 146: ...P 870HW I1 User s Guide 146 Chapter 10 NAT...
Страница 158: ...P 870HW I1 User s Guide 158 Chapter 11 Firewalls Figure 87 Security Firewall Rules Edit...
Страница 168: ...P 870HW I1 User s Guide 168 Chapter 12 Content Filter...
Страница 196: ...P 870HW I1 User s Guide 196 Chapter 14 Static Route...
Страница 200: ...P 870HW I1 User s Guide 200 Chapter 15 Bandwidth MGMT Figure 112 Management Bandwidth MGMT Configuration...
Страница 228: ...P 870HW I1 User s Guide 228 Chapter 17 UPnP...
Страница 236: ...P 870HW I1 User s Guide 236 Chapter 18 System...
Страница 245: ...P 870HW I1 User s Guide Chapter 20 Tools 245 Figure 152 Restart Screen Click Restart to have the ZyXEL Device reboot...
Страница 246: ...P 870HW I1 User s Guide 246 Chapter 20 Tools...
Страница 256: ...P 870HW I1 User s Guide 256 Chapter 22 General Setup...
Страница 258: ...P 870HW I1 User s Guide 258 Chapter 23 WAN Setup...
Страница 266: ...P 870HW I1 User s Guide 266 Chapter 24 LAN Setup...
Страница 286: ...P 870HW I1 User s Guide 286 Chapter 29 NAT Setup...
Страница 304: ...P 870HW I1 User s Guide 304 Chapter 30 Filter Setup...
Страница 306: ...P 870HW I1 User s Guide 306 Chapter 31 Firewall Setup...
Страница 308: ...P 870HW I1 User s Guide 308 Chapter 32 SNMP Configuration...
Страница 332: ...P 870HW I1 User s Guide 332 Chapter 35 System Maintenance 24 5 24 7...
Страница 346: ...P 870HW I1 User s Guide 346 Chapter 37 IP Routing Policy Setup...
Страница 362: ...P 870HW I1 User s Guide 362 Chapter 39 Troubleshooting Figure 242 Security Setting ActiveX Controls...
Страница 364: ...P 870HW I1 User s Guide 364 Appendix A Product Specifications...
Страница 390: ...P 870HW I1 User s Guide 390 Appendix D NAT...
Страница 396: ...P 870HW I1 User s Guide 396 Appendix E Firewall Commands...
Страница 434: ...P 870HW I1 User s Guide 434 Appendix I Services...