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Chapter 6 WAN Setup

P-660H-T1v3s User’s Guide

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-660H-T1v3s, which makes it

accessible from an outside network. It is used by the P-660H-T1v3s to

communicate with other devices in other networks. It can be static (fixed) or

dynamically assigned by the ISP each time the P-660H-T1v3s 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).

Multicast

Traditionally, IP packets are transmitted in one of either two ways - Unicast (1

sender - 1 recipient) or Broadcast (1 sender - everybody on the network).

Multicast delivers IP packets to a group of hosts on the network - not everybody

and not just one.

IGMP

IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to

establish membership in a Multicast group - it is not used to carry user data.

There are three versions of IGMP. IGMP version 2 and 3 are improvements over

version 1, but IGMP version 1 is still in wide use.

Finding Out More

See Section 6.4 on page 82 for technical background information on WAN.

6.1.3 Before You Begin

You need to know your Internet access settings such as encapsulation and WAN IP

address. Get this information from your ISP.

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