P-2602H(W)(L)-DxA Series User’s Guide

Chapter 6 Status Screens

91

Tx B/s

This field displays how quickly the ZyXEL Device has transmitted packets in the

current call. The rate is the average number of bytes transmitted per second.

Rx B/s

This field displays how quickly the ZyXEL Device has received packets in the

current call. The rate is the average number of bytes transmitted per second.

Poll Interval(s)

Enter how often you want the ZyXEL Device to update this screen, and click

Set

Interval

.

Set Interval

Click this to make the ZyXEL Device update the screen based on the amount of

time you specified in

Poll Interval

.

Stop

Click this to make the ZyXEL Device stop updating the screen.

Table 25

VoIP Statistics

LABEL

DESCRIPTION

P-2602H(W)(L)-DxA Series User’s Guide

92

Chapter 6 Status Screens

P-2602H(W)(L)-DxA Series User’s Guide

Chapter 7 WAN Setup

93

C

HAPTER

7

WAN Setup

This chapter describes how to configure WAN settings.

7.1

WAN Overview

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

7.1.1

Encapsulation

Be sure to use the encapsulation method required by your ISP. The ZyXEL Device supports

the following methods.

7.1.1.1

ENET ENCAP

The MAC Encapsulated Routing Link Protocol (ENET ENCAP) is only implemented with the

IP network protocol. IP packets are routed between the Ethernet interface and the WAN

interface and then formatted so that they can be understood in a bridged environment. For

instance, it encapsulates routed Ethernet frames into bridged ATM cells. ENET ENCAP

requires that you specify a gateway IP address in the

ENET ENCAP Gateway

field in the

second wizard screen. You can get this information from your ISP.

7.1.1.2

PPP over Ethernet

The ZyXEL Device supports PPPoE (Point-to-Point Protocol over Ethernet). PPPoE is an

IETF Draft standard (RFC 2516) specifying how a personal computer (PC) interacts with a

broadband modem (DSL, cable, wireless, etc.) connection. The

PPPoE

option is for a dial-up

connection using PPPoE.

For the service provider, PPPoE offers an access and authentication method that works with

existing access control systems (for example RADIUS).

One of the benefits of PPPoE is the ability to let you access one of multiple network services,

a function known as dynamic service selection. This enables the service provider to easily

create and offer new IP services for individuals.

Operationally, PPPoE saves significant effort for both you and the ISP or carrier, as it requires

no specific configuration of the broadband modem at the customer site.

P-2602H(W)(L)-DxA Series User’s Guide

94

Chapter 7 WAN Setup

By implementing PPPoE directly on the ZyXEL Device (rather than individual computers),

the computers on the LAN do not need PPPoE software installed, since the ZyXEL Device

does that part of the task. Furthermore, with NAT, all of the LANs’ computers will have

access.

7.1.1.3

PPPoA

PPPoA stands for Point to Point Protocol over ATM Adaptation Layer 5 (AAL5). A PPPoA

connection functions like a dial-up Internet connection. The ZyXEL Device encapsulates the

PPP session based on RFC1483 and sends it through an ATM PVC (Permanent Virtual

Circuit) to the Internet Service Provider’s (ISP) DSLAM (digital access multiplexer). Please

refer to RFC 2364 for more information on PPPoA. Refer to RFC 1661 for more information

on PPP.

7.1.1.4

RFC 1483

RFC 1483 describes two methods for Multiprotocol Encapsulation over ATM Adaptation

Layer 5 (AAL5). The first method allows multiplexing of multiple protocols over a single

ATM virtual circuit (LLC-based multiplexing) and the second method assumes that each

protocol is carried over a separate ATM virtual circuit (VC-based multiplexing). Please refer

to RFC 1483 for more detailed information.

7.1.2

Multiplexing

There are two conventions to identify what protocols the virtual circuit (VC) is carrying. Be

sure to use the multiplexing method required by your ISP.

7.1.2.1

VC-based Multiplexing

In this case, by prior mutual agreement, each protocol is assigned to a specific virtual circuit;

for example, VC1 carries IP, etc. VC-based multiplexing may be dominant in environments

where dynamic creation of large numbers of ATM VCs is fast and economical.

7.1.2.2

LLC-based Multiplexing

In this case one VC carries multiple protocols with protocol identifying information being

contained in each packet header. Despite the extra bandwidth and processing overhead, this

method may be advantageous if it is not practical to have a separate VC for each carried

protocol, for example, if charging heavily depends on the number of simultaneous VCs.

7.1.3

VPI and VCI

Be sure to use the correct Virtual Path Identifier (VPI) and Virtual Channel Identifier (VCI)

numbers assigned to you. The valid range for the VPI is 0 to 255 and for the VCI is 32 to

65535 (0 to 31 is reserved for local management of ATM traffic). Please see the appendix for

more information.

P-2602H(W)(L)-DxA Series User’s Guide

Chapter 7 WAN Setup

95

7.1.4

IP Address Assignment

A static IP is a fixed IP that your ISP gives you. A dynamic IP is not fixed; the ISP assigns you

a different one each time. The Single User Account feature can be enabled or disabled if you

have either a dynamic or static IP. However the encapsulation method assigned influences

your choices for IP address and ENET ENCAP gateway.

7.1.4.1

IP Assignment with PPPoA or PPPoE Encapsulation

If you have a dynamic IP, then the

IP Address

and

ENET ENCAP Gateway

fields are not

applicable (N/A). If you have a static IP, then you

only

need to fill in the

IP Address

field and

not

the

ENET ENCAP Gateway

field.

7.1.4.2

IP Assignment with RFC 1483 Encapsulation

In this case the IP Address Assignment

must

be static with the same requirements for the

IP

Address

and

ENET ENCAP Gateway

fields as stated above.

7.1.4.3

IP Assignment with ENET ENCAP Encapsulation

In this case you can have either a static or dynamic IP. For a static IP you must fill in all the

IP

Address

and

ENET ENCAP Gateway

fields as supplied by your ISP. However for a

dynamic IP, the ZyXEL Device acts as a DHCP client on the WAN port and so the

IP

Address

and

ENET ENCAP Gateway

fields are not applicable (N/A) as the DHCP server

assigns them to the ZyXEL Device.

7.1.5

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 idle timeout is disabled. The second is that the ZyXEL Device will try to bring up

the connection when turned on and whenever the connection is down. A nailed-up connection

can be very expensive for obvious reasons.

Do not specify 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.

7.1.6

NAT

NAT (Network Address Translation - NAT, RFC 1631) is the translation of the IP address of a

host in a packet, for example, the source address of an outgoing packet, used within one

network to a different IP address known within another network.