Chapter 6 Broadband
VMG3925-B10A User’s Guide
60
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 VMG, which makes it accessible from an outside
network. It is used by the VMG to communicate with other devices in other networks. It can be
static (fixed) or dynamically assigned by the ISP each time the VMG 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
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.
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
Table 6 WAN Setup Overview
LAYER-2 INTERFACE INTERNET CONNECTION
CONNECTION
DSL LINK
TYPE
MODE ENCAPSULATION CONNECTION SETTINGS
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