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WAN Setup, 6.1 WAN Overview, 6.2 Metric

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Page 59 highlights

CHAPTER 6 WAN Setup This chapter describes how to configure WAN settings. 6.1 WAN Overview A WAN (Wide Area Network) is an outside connection to another network or the Internet. See Section on page 31 for more information on the fields in the WAN screens. 6.2 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 Section 6.5 on page 61) • Traffic-redirect route (see Section 6.7 on page 64) • WAN-backup route, also called dial-backup (see Section 6.8 on page 65) For example, if the normal route has a metric of "1" and the traffic-redirect route has a metric of "2" and dial-backup route has a metric of "3", 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. In the same manner, the ZyXEL Device uses the dial-backup route if the traffic-redirect route also fails. If you want the dial-backup route to take first priority over the traffic-redirect route or even the normal route, all you need to do is set the dial-backup route's 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. P-660RU-T v2 User's Guide 59

Section	Page
User’s Guide	1
About This User's Guide	3
Document Conventions	4
Safety Warnings	6
Contents Overview	9
Table of Contents	11
List of Figures	17
List of Tables	21
Introduction	23
Introducing the ZyXEL Device	25
1.1 Overview	25
1.2 Ways to Manage the ZyXEL Device	26
1.3 Good Habits for Managing the ZyXEL Device	27
1.4 ZyXEL Device Hardware Installation and Connection	27
1.5 LEDs	27
Introducing the Web Configurator	29
2.1 Web Configurator Overview	29
2.1.1 Accessing the ZyXEL Device Web Configurator	29
2.2 Resetting the ZyXEL Device	30
2.3 Navigating the ZyXEL Device Web Configurator	31
2.4 The Site Map Screen	32
Wizard	35
Wizard Setup	37
3.1 Introduction	37
3.1.1 Encapsulation	37
3.1.2 Multiplexing	38
3.1.3 VPI and VCI	38
3.1.4 Internet Access Wizard Setup: First Screen	38
3.2 IP Address and Subnet Mask	39
3.2.1 IP Address Assignment	39
3.2.2 Nailed-Up Connection (PPP)	40
3.2.3 NAT	41
3.2.4 Internet Access Wizard Setup: Second Screen	41
3.2.5 DHCP Setup	45
3.2.6 Internet Access Wizard Setup: Third Screen	45
3.2.7 Internet Access Wizard Setup: Connection Test	46
Advanced	49
Password Setup	51
4.1 Password Overview	51
4.1.1 Configuring Password	51
LAN Setup	53
5.1 LAN Overview	53
5.1.1 LANs, WANs and the ZyXEL Device	53
5.2 DNS Server Addresses	54
5.3 LAN TCP/IP	54
5.3.1 Factory LAN Defaults	54
5.3.2 IP Address and Subnet Mask	54
5.3.3 RIP Setup	55
5.3.4 Multicast	55
5.4 Any IP	56
5.4.1 How Any IP Works	56
5.5 Configuring the LAN	57
WAN Setup	59
6.1 WAN Overview	59
6.2 Metric	59
6.3 PPPoE Encapsulation	60
6.4 Traffic Shaping	60
6.5 Zero Configuration Internet Access	61
6.6 Configuring WAN Setup	61
6.7 Traffic Redirect	64
6.8 Configuring WAN Backup	65
Security	69
7.1 Configuring Internet Security	69
Dynamic DNS Setup	71
8.1 Dynamic DNS	71
8.1.1 DYNDNS Wildcard	71
8.2 Configuring Dynamic DNS	71
Time and Date	73
9.1 Configuring Time and Date	73
Remote Management Configuration	75
10.1 Remote Management Overview	75
10.1.1 Remote Management Limitations	75
10.1.2 Remote Management and NAT	76
10.1.3 System Timeout	76
10.2 Telnet	76
10.3 FTP	76
10.4 Web	76
10.5 Configuring Remote Management	76
Universal Plug-and-Play (UPnP)	79
11.1 Introducing Universal Plug and Play (UPnP)	79
11.1.1 How do I know if I'm using UPnP?	79
11.1.2 NAT Traversal	79
11.1.3 Cautions with UPnP	79
11.2 UPnP and ZyXEL	80
11.2.1 Configuring UPnP	80
11.3 Installing UPnP in Windows	80
11.3.1 Installing UPnP in Windows Me	81
11.3.2 Installing UPnP in Windows XP	82
11.4 Using UPnP in Windows XP: Example	84
11.4.1 Web Configurator Easy Access	87
Network Address Translation (NAT) Screens	91
12.1 NAT Overview	91
12.1.1 NAT Definitions	91
12.1.2 What NAT Does	92
12.1.3 How NAT Works	92
12.1.4 NAT Application	93
12.1.5 NAT Mapping Types	93
12.2 SUA (Single User Account) Versus NAT	94
12.3 SUA Server	95
12.3.1 Default Server IP Address	95
12.3.2 Port Forwarding: Services and Port Numbers	95
12.3.3 Configuring Servers Behind SUA (Example)	96
12.4 Selecting the NAT Mode	96
12.5 Configuring SUA Server	97
12.6 Configuring Address Mapping	98
12.7 Editing an Address Mapping Rule	99
Maintenance and Troubleshooting	101
Maintenance	103
13.1 Maintenance Overview	103
13.2 System Status Screen	103
13.2.1 System Statistics	105
13.3 DHCP Table Screen	106
13.4 Any IP Table Screen	107
13.5 Diagnostic Screens	108
13.5.1 Diagnostic General Screen	108
13.5.2 Diagnostic DSL Line Screen	109
13.6 Firmware Screen	110
13.7 Configuration Screen	111
13.7.1 Backup Configuration	112
13.7.2 Restore Configuration	112
13.7.3 Reset to Factory Defaults	114
Troubleshooting	115
14.1 Power, Hardware Connections, and LEDs	115
14.2 ZyXEL Device Access and Login	116
14.3 Internet Access	117
Appendices and Index	119
Product Specifications	121
Setting up Your Computer’s IP Address	125
IP Addresses and Subnetting	141
Pop-up Windows, JavaScripts and Java Permissions	149
Virtual Circuit Topology	155
Legal Information	157
Customer Support	161

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P-660RU-T v2 User’s Guide

HAPTER

WAN Setup

This chapter describes how to configure WAN settings.

6.1

WAN Overview

A WAN (Wide Area Network) is an outside connection to another network or the Internet.

See

Section

on page 31

for more information on the fields in the WAN screens.

6.2

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

Section 6.5 on page 61

)

•

Traffic-redirect route (see

Section 6.7 on page 64

)

•

WAN-backup route, also called dial-backup (see

Section 6.8 on page 65

)

For example, if the normal route has a metric of "1" and the traffic-redirect route has a metric

of "2" and dial-backup route has a metric of "3", 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. In the same manner, the ZyXEL Device uses the dial-backup route

if the traffic-redirect route also fails.

If you want the dial-backup route to take first priority over the traffic-redirect route or even the

normal route, all you need to do is set the dial-backup route’s 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.