ZyXEL Communications NBG6503 Manuel D’Utilisation

 Chapter 11 WAN

NBG6503 User’s Guide

The Router 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 Router (rather than individual computers), the computers on 
the LAN do not need PPPoE software installed, since the Router does that part of the task. 
Furthermore, with NAT, all of the LANs’ computers will have access.

IP Subnet 

Mask

Enter the IP Subnet Mask in this field.

Gateway IP 

Address

Enter a Gateway IP Address (if your ISP gave you one) in this field.

MTU Size

Enter the Maximum Transmission Unit (MTU) or the largest packet size per frame that your 
Router can receive and process.

WAN DNS Assignment

First DNS 
Server

Second DNS 
Server

Select From ISP if your ISP dynamically assigns DNS server information (and the Router'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. If you chose User-Defined, but leave the IP address set to 
0.0.0.0, User-Defined changes to None after you click Apply. If you set a second choice 
to User-Defined, and enter the same IP address, the second User-Defined changes to 
None after you click Apply. 

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

The MAC address section allows users to configure the WAN port's MAC address by either 
using the Router’s MAC address, copying the MAC address from a computer on your LAN or 
manually entering a MAC address. 

Factory default

Select Factory default to use the factory assigned default MAC Address.

Clone the 
computer’s 
MAC address - 
IP Address

Select Clone the computer's MAC address - IP Address and enter the IP address of the 
computer on the LAN whose MAC you are cloning.

Set WAN MAC 
Address

Select this option and enter the MAC address you want to use.

Apply

Click Apply to save your changes back to the Router.

Reset

Click Reset to begin configuring this screen afresh.

Table 42   Network > WAN > Internet Connection: Ethernet Encapsulation (continued)