Chapter 6 Broadband
VMG4380-B10A / VMG4325-B10A User’s Guide
76
•
Use the 
Advanced
screen to enable or disable PTM over ADSL, Annex M/Annex J, and DSL PhyR 
functions (
Section 6.4 on page 93
). 
•
Use the 
8021x
screen to view and configure the IEEE 802.1x settings on the Device (
Section 6.5 
on page 95
). 
6.1.2 
What You Need to Know
The following terms and concepts may help as you read this chapter.
Encapsulation Method
Encapsulation is used to include data from an upper layer protocol into a lower layer protocol. To set 
up a WAN connection to the Internet, you need to use the same encapsulation method used by your 
ISP (Internet Service Provider). If your ISP offers a dial-up Internet connection using PPPoE (PPP 
over Ethernet), they should also provide a username and password (and service name) for user 
authentication.
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 
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/PPP0A
ATM PCV configuration, PPP 
information, IPv4/IPv6 IP address, 
routing feature, DNS server, VLAN, 
QoS, and MTU
IPoE/IPoA
ATM PCV configuration, IPv4/IPv6 
IP address, routing feature, DNS 
server, VLAN, QoS, and MTU
Bridge
N/A
ATM PCV configuration, and QoS