Chapter 5 WAN Setup
5.2 What You Need to Know
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) or PPPoA, 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 P-2812HNU-51c, which makes it accessible from an outside network. It is used by the P-2812HNU-51c to communicate with other devices in other networks. It can be static (fixed) or dynamically assigned by the ISP each time the P-2812HNU-51c 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) (and a gateway IP address if you use the Ethernet or ENET ENCAP encapsulation method).
ATM
Asynchronous Transfer Mode (ATM) is is a LAN and 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 two endpoints before the actual data exchange begins.
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.
NAT Types
This section discusses the following NAT types that are implemented on the P- 2812HNU-51c.
•Full Cone
•Restricted Cone
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