VMG1312-B Series User’s Guide

66

C

HAPTER

6

Broadband

6.1

Overview

This chapter discusses the Device’s

Broadband

screens. Use these screens to configure your

Device for Internet access.

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

Internet. It connects your private networks, such as a LAN (Local Area Network) and other

networks, so that a computer in one location can communicate with computers in other locations.

Figure 18

LAN and WAN

6.1.1

What You Can Do in this Chapter

•

Use the

Broadband

screen to view, remove or add a WAN interface. You can also configure the

WAN settings on the Device for Internet access (

Section 6.2 on page 70

).

•

Use the

3G Backup

screen to configure 3G WAN connection (

Section 6.3 on page 79

).

•

Use the

Advanced

screen to enable or disable PTM over ADSL, Annex M/Annex J, and DSL PhyR

functions (

Section 6.4 on page 83

).

•

Use the

802.1x

screen to view and configure the IEEE 802.1X settings on the Device (

Section

6.5 on page 86

).

•

Use the

Ethernet WAN

screen to convert LAN port number four as a WAN port or restore the

WAN to a LAN port (

Section 6.6 on page 87

). This is for Ethernet connection.

WAN

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67

6.1.2

What You Need to Know

The following terms and concepts may help as you read this chapter.

WAN IP Address

The WAN IP address is an IP address for the Device, which makes it accessible from an outside

network. It is used by the Device to communicate with other devices in other networks. It can be

static (fixed) or dynamically assigned by the ISP each time the Device tries to access the Internet.

If your ISP assigns you a static WAN IP address, they should also assign you the subnet mask and

DNS server IP address(es).

ATM

Asynchronous Transfer Mode (ATM) is a WAN networking technology that provides high-speed data

transfer. ATM uses fixed-size packets of information called cells. With ATM, a high QoS (Quality of

Service) can be guaranteed. ATM uses a connection-oriented model and establishes a virtual circuit

(VC) between Finding Out More

Table 6

WAN Setup Overview

LAYER-2 INTERFACE

INTERNET CONNECTION

CONNECTION

DSL LINK

TYPE

MODE

ENCAPSULATION

CONNECTION SETTINGS

ADSL/VDSL

over PTM

N/A

Routing

PPPoE

PPP information, IPv4/IPv6 IP

address, routing feature, DNS

server, VLAN, QoS, and MTU

IPoE

IPv4/IPv6 IP address, routing

feature, DNS server, VLAN, QoS,

and MTU

Bridge

N/A

VLAN and QoS

ADSL over ATM

EoA

Routing

PPPoE/PPPoA

ATM PVC configuration, PPP

information, IPv4/IPv6 IP address,

routing feature, DNS server, VLAN,

QoS, and MTU

IPoE/IPoA

ATM PVC configuration, IPv4/IPv6

IP address, routing feature, DNS

server, VLAN, QoS, and MTU

Bridge

N/A

ATM PVC configuration, and QoS

Ethernet

N/A

Routing

PPPoE

PPP user name and password, WAN

IPv4/IPv6 IP address, routing

feature, DNS server, VLAN, QoS,

and MTU

IPoE

WAN IPv4/IPv6 IP address, NAT,

DNS server and routing feature

Bridge

N/A

VLAN and QoS

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PTM

Packet Transfer Mode (PTM) is packet-oriented and supported by the VDSL2 standard. In PTM,

packets are encapsulated directly in the High-level Data Link Control (HDLC) frames. It is designed

to provide a low-overhead, transparent way of transporting packets over DSL links, as an

alternative to ATM.

IPv6 Introduction

IPv6 (Internet Protocol version 6), is designed to enhance IP address size and features. The

increase in IPv6 address size to 128 bits (from the 32-bit IPv4 address) allows up to 3.4 x 10

38

IP

addresses. The Device can use IPv4/IPv6 dual stack to connect to IPv4 and IPv6 networks, and

supports IPv6 rapid deployment (6RD).

IPv6 Addressing

The 128-bit IPv6 address is written as eight 16-bit hexadecimal blocks separated by colons (:). This

is an example IPv6 address

2001:0db8:1a2b:0015:0000:0000:1a2f:0000

.

IPv6 addresses can be abbreviated in two ways:

•

Leading zeros in a block can be omitted. So

2001:0db8:1a2b:0015:0000:0000:1a2f:0000

can be written as

2001:db8:1a2b:15:0:0:1a2f:0

.

•

Any number of consecutive blocks of zeros can be replaced by a double colon. A double

colon can only appear once in an IPv6 address. So

2001:0db8:0000:0000:1a2f:0000:0000:0015

can be written as

2001:0db8::1a2f:0000:0000:0015

,

2001:0db8:0000:0000:1a2f::0015

,

2001:db8::1a2f:0:0:15

or

2001:db8:0:0:1a2f::15

.

IPv6 Prefix and Prefix Length

Similar to an IPv4 subnet mask, IPv6 uses an address prefix to represent the network address. An

IPv6 prefix length specifies how many most significant bits (start from the left) in the address

compose the network address. The prefix length is written as “/x” where x is a number. For

example,

2001:db8:1a2b:15::1a2f:0/32

means that the first 32 bits (

2001:db8

) is the subnet prefix.

IPv6 Subnet Masking

Both an IPv6 address and IPv6 subnet mask compose of 128-bit binary digits, which are divided

into eight 16-bit blocks and written in hexadecimal notation. Hexadecimal uses four bits for each

character (1 ~ 10, A ~ F). Each block’s 16 bits are then represented by four hexadecimal

characters. For example, FFFF:FFFF:FFFF:FFFF:FC00:0000:0000:0000.

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IPv6 Rapid Deployment

Use IPv6 Rapid Deployment (6rd) when the local network uses IPv6 and the ISP has an IPv4

network. When the Device has an IPv4 WAN address and you set

IPv6/IPv4 Mode

to

IPv4 Only

,

you can enable 6rd to encapsulate IPv6 packets in IPv4 packets to cross the ISP’s IPv4 network.

The Device generates a global IPv6 prefix from its IPv4 WAN address and tunnels IPv6 traffic to the

ISP’s Border Relay router (BR in the figure) to connect to the native IPv6 Internet. The local

network can also use IPv4 services. The Device uses it’s configured IPv4 WAN IP to route IPv4

traffic to the IPv4 Internet.

Figure 19

IPv6 Rapid Deployment

Dual Stack Lite

Use Dual Stack Lite when local network computers use IPv4 and the ISP has an IPv6 network.

When the Device has an IPv6 WAN address and you set

IPv6/IPv4 Mode

to

IPv6 Only

, you can

enable Dual Stack Lite to use IPv4 computers and services.

The Device tunnels IPv4 packets inside IPv6 encapsulation packets to the ISP’s Address Family

Transition Router (AFTR in the graphic) to connect to the IPv4 Internet. The local network can also

use IPv6 services. The Device uses it’s configured IPv6 WAN IP to route IPv6 traffic to the IPv6

Internet.

ISP (IPv4)

IPv6 Internet

IPv4

IPv6

BR

IPv6 in IPv4

IPv4 Internet

IPv4

+

LAN

- IPv6

- IPv4

WAN

- IPv4

- IPv6 in IPv4

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Figure 20

Dual Stack Lite

6.1.3

Before You Begin

You need to know your Internet access settings such as encapsulation and WAN IP address. Get this

information from your ISP.

6.2

The Broadband Screen

Use this screen to change your Device’s Internet access settings. Click

Network Setting

>

Broadband

from the menu. The summary table shows you the configured WAN services

(connections) on the Device.

Figure 21

Network Setting > Broadband

The following table describes the labels in this screen.

ISP (IPv6)

IPv6 Internet

IPv6

AFTR

IPv4 in IPv6

IPv4 Internet

IPv6

IPv4

+

LAN

- IPv6

- IPv4

WAN

- IPv6

- IPv4 in IPv6

Table 7

Network Setting > Broadband

LABEL

DESCRIPTION

Add New WAN

Interface

Click this button to create a new connection.

#

This is the index number of the entry.

Name

This is the service name of the connection.

Type

This shows whether it is an ATM, Ethernet or a PTM connection.