Zyxel NBG6817 Router Manual PDF (Setup & Configuration Guide)

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Chapter 10 WAN

NBG6817 User’s Guide

76

The following table describes the labels in this screen.

Table 19

Network > WAN > Internet Connection: IPoE Encapsulation

LABEL

DESCRIPTION

ISP Parameters for Internet Access

Encapsulation

You must choose the

IPoE

option when the WAN port is used as a regular Ethernet.

IPv4 / IPv6

Select

IPv4 Only

if you want the NBG6817 to run IPv4 only.

Select

Dual Stack

to allow the NBG6817 to run IPv4 and IPv6 at the same time.

Select

IPv6 Only

if you want the NBG6817 to run IPv6 only.

IP Address

Obtain an IP

Address

Automatically

(DHCP)

Select this option If your ISP did not assign you a fixed IP address. This is the default

selection.

Static IP Address

Select this option If the ISP assigned a fixed IP address.

IP Address

Enter your WAN IP address in this field if you selected

Static IP Address

.

Subnet Mask

Enter the

Subnet Mask

in this field.

Default Gateway

Enter a gateway IP address (if your ISP gave you one) in this field.

MTU Size

Enter the MTU (Maximum Transmission Unit) size for each packet. If a larger packet

arrives, the NBG6817 divides it into smaller fragments.

DNS Server

First DNS Server

Second DNS Server

Third DNS Server

Select

Obtained From ISP

if your ISP dynamically assigns DNS server information

(and the NBG6817's WAN IP address). The field to the right displays the (read-only)

DNS server IP address that the ISP assigns.

Select

User-Defined

if you have the IP address of a DNS server. Enter the DNS

server's IP address in the field to the right.

Select

None

if you do not want to configure DNS servers. If you do not configure a DNS

server, you must know the IP address of a computer in order to access it.

WAN MAC Address

Once the WAN MAC address is successfully configured, the address will be copied to the configuration file. It

will not change unless you change the setting or upload a different configuration file.

Factory default

Select this option to have the WAN interface use the factory assigned default MAC

address. By default, the NBG6817 uses the factory assigned MAC address to identify

itself.

Clone the

computer's MAC

address - IP

Address

Select this option to have the WAN interface use a different MAC address by cloning the

MAC address of another device or computer. Enter the IP address of the device or

computer whose MAC you are cloning.

Set WAN MAC

Address

Select this option to have the WAN interface use a manually specified MAC address.

Enter the MAC address in the fields.

IPv6 Tunneling

Use IPv6 tunneling when the local network uses IPv6 and the ISP has an IPv4 network. When the NBG6817

has an IPv4 WAN address and you set

IPv4/IPv6

mode to

IPv4 Only

, you can enable IPv6 tunneling to

encapsulate IPv6 packets in IPv4 packets to cross the ISP’s IPv4 network.

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Chapter 10 WAN

NBG6817 User’s Guide

77

IPv6 Tunneling

Select

None

to not allow IPv6 packets to cross IPv4 networks.

Select

6RD

to enable 6RD. IPv6 Rapid Deployment (6RD) is an IPv6 transitioning

process for stateless tunneling of IPv6 over IPv4. Enable 6RD to allow tunneling across

an ISP's IPv4 only access network.

Select

6to4

to transmit IPv6 packets over an IPv4 network. A 6to4 relay router is

required to route 6to4 packets to a native IPv6 network.

Select

6in4

if the NBG6817 has a public IPv4 address and you want to transmit your

IPv6 packets to one and only one remote site whose LAN network is also an IPv6

network. You must know the WAN IP address of the remote gateway.

6RD

The NBG6817 generates a global IPv6 prefix from its IPv4 WAN address and tunnels IPv6 traffic to the ISP’s

Border Relay router to connect to the native IPv6 Internet. The local network can also use IPv4 services. The

NBG6817 uses its configured IPv4 WAN IP to route IPv4 traffic to the IPv4 Internet.

This is available only when you select

IPv4 Only

in the

IPv4/IPv6

field.

Automatically

configured by

DHCPC

Select this to have the NBG6817 detect the relay server’s IP address automatically

through DHCP.

Manually Configured

Select this if you have the IPv4 address of the relay server.

Border Relay IPv4

Address

Specify the relay server’s IPv4 address.

Service Provider

IPv6 Prefix

Enter an IPv6 prefix for tunneling IPv6 traffic to the ISP’s Border Relay router and

connecting to the native IPv6 Internet.

Service Provider

IPv6 Prefix length

Enter the IPv6 prefix length.

An IPv6 prefix length specifies how many most significant bits (starting from the left) in

the address compose the network address.

IPv4 mask length

Enter the subnet mask number (1~32) for the IPv4 network.

6to4

The NBG6817 should get a public IPv4 address for the WAN. The NBG6817 adds an IPv4 IP header to an IPv6

packet when transmitting the packet to the Internet. In reverse, the NBG6817 removes the IPv4 header from

an IPv6 packet when receiving it from the Internet.

This is available only when you select

IPv4 Only

in the

IPv4/IPv6

field.

Relay Server IPv4

Address

Enter the IPv4 address of a 6to4 relay server which helps forward packets between

6to4 networks and native IPv6 networks.

6in4

The NBG6817 encapsulates IPv6 packets within IPv4 packets across the Internet. You must know the WAN IP

address of the remote gateway device. This mode is normally used for a site-to-site application such as two

branch offices.

This is available only when you select

IPv4 Only

in the

IPv4/IPv6

field.

Remote IPv4

Address

Enter the IPv4 address of the remote gateway to which this interface tunnels traffic.

Remote IPv6

Address

Enter the IPv6 address of the remote gateway to which this interface tunnels traffic.

Local IPv6 Address

Enter the IPv6 address assigned by your ISP.

IPv6 Prefix

Enter the IPv6 prefix for this interface if you want to use a static IP address.

Table 19

Network > WAN > Internet Connection: IPoE Encapsulation (continued)

LABEL

DESCRIPTION

Page 78 / 209

Chapter 10 WAN

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IPv6 DNS Server

This is available only when you select

IPv4 Only

in the

IPv4/IPv6

field and set

IPv6 Tunneling

to

6RD

,

6in4

or

6to4

.

First DNS Server

Second DNS Server

Third DNS Server

Specify the DNS server IPv6 address assigned by the ISP.

IPv6 Address

This section is NOT available when you select

IPv4 Only

in the

IPv4/IPv6

field.

Obtain an IP

Address

Automatically(DHCP

)

Select this option if you want to obtain an IPv6 address from a DHCPv6 server.

•

Select

DUID-LL (Default)

to have the NBG6817 use DUID-LL (DUID Based on

Link-layer Address) for identification when exchanging DHCPv6 messages.

•

Select

DUID-LLT

to have the NBG6817 use DUID-LLT (DUID Based on Link-layer

Address Plus Time) for identification when exchanging DHCPv6 messages.

Static IP Address

Select this option if you have a fixed IPv6 address assigned by your ISP.

IPv6 Address

Enter the IPv6 address assigned by your ISP.

Prefix length

Enter the address prefix length to specify how many most significant bits in an IPv6

address compose the network address.

IPv6 Default

Gateway

Enter the IPv6 address of the next-hop gateway. The gateway helps forward packets to

their destinations.

Link Local Only

Select this option to use the link-local address which uniquely identifies a device on the

local network (the LAN).

IPv6 DNS Server

This is available only when you select

Dual Stack

or

IPv6 Only

in the

IPv4/IPv6

field.

First DNS Server

Second DNS Server

Third DNS Server

Select

Obtained From ISP

to have the NBG6817 get the IPv6 DNS server addresses

from the ISP automatically.

Select

User-Defined

and enter the IPv6 DNS server address assigned by the ISP to

have the NBG6817 use the IPv6 DNS server addresses you configure manually.

Select

None

if you do not want to configure DNS servers. If you do not configure a DNS

server, you must know the IPv6 address of a computer in order to access it.

Multicast Setup

Select

IGMPv1/v2

to enable multicasting. This applies to traffic routed from the WAN

to the LAN.

Select

None

to disable this feature. This may cause incoming traffic to be dropped or

sent to all connected network devices.

Auto-Subnet Configuration

Enable Auto-IP-

Change Mode

Select this option to have the NBG6817 change its LAN IP address to 10.0.0.1 or

192.168.1.1 accordingly when the NBG6817 gets a dynamic WAN IP address in the

same subnet as the LAN IP address.

Select this option to have the NBG6817 change its LAN IP address to 10.0.0.1 or

192.168.1.1 accordingly when the NBG6817 gets a DNS server IP address in the same

subnet as the LAN IP address.

The NAT, DHCP server and firewall functions on the NBG6817 are still available in this

mode.

Apply

Click

Apply

to save your changes back to the NBG6817.

Cancel

Click

Cancel

to begin configuring this screen afresh.

Table 19

Network > WAN > Internet Connection: IPoE Encapsulation (continued)

LABEL

DESCRIPTION

Page 79 / 209

Chapter 10 WAN

NBG6817 User’s Guide

79

10.4.2

PPPoE Encapsulation

The NBG6817 supports PPPoE (Point-to-Point Protocol over Ethernet). PPPoE is an IETF standard

(RFC 2516) specifying how a personal computer (PC) interacts with a broadband modem (DSL,

cable, wireless, etc.) connection. The

PPP over Ethernet

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.

By implementing PPPoE directly on the NBG6817 (rather than individual computers), the computers

on the LAN do not need PPPoE software installed, since the NBG6817 does that part of the task.

Furthermore, with NAT, all of the LANs’ computers will have access.

Page 80 / 209

Chapter 10 WAN

NBG6817 User’s Guide

80

This screen displays when you select

PPPoE

encapsulation.

Figure 55

Network > WAN > Internet Connection: PPPoE Encapsulation (IPv4 Only)

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