ZyXEL Communications Corporation NBG418NV2 Manuel D’Utilisation

Chapter 7 WAN

The NBG-418N 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 NBG-418N (rather than individual computers), the 
computers on the LAN do not need PPPoE software installed, since the NBG-418N does that part of 
the task. Furthermore, with NAT, all of the LANs’ computers will have access.

First DNS Server

Second DNS 
Server

Select From ISP if your ISP dynamically assigns DNS server information (and the NBG-
418N’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 primary and 
secondary DNS server's IP address in the fields to the right.

WAN MAC Address The MAC address section allows users to configure the WAN port's MAC address by either 

using the NBG-418N’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 - MAC 
Address

Select this option to clone the MAC address of the computer (displaying in the screen) 
from which you are configuring the NBG-418N. Once it is successfully configured, the 
address will be copied to the rom file. It will not change unless you change the setting or 
upload a different ROM file.

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 NBG-418N.

Reset

Click Reset to begin configuring this screen afresh.

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