ZyXEL Communications P-660RU-T1 v3, User Manual, Page: 69 / 230

Chapter 7 Internet Setup
P-660RU-Tx v3 User’s Guide
69
7.3 WAN Technical Reference
This section provides some technical background information about the topics covered in this
chapter.
7.3.1 Encapsulation
Be sure to use the encapsulation method required by your ISP. The ZyXEL Device supports
the following methods.
PPP over Ethernet
The ZyXEL Device supports Point-to-Point Protocol over Ethernet (PPPoE). PPPoE is an
IETF Draft standard (RFC 2516) specifying how a personal computer (PC) interacts with a
broadband modem (DSL, cable, wireless, etc.) connection. The PPPoE 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 ZyXEL Device (rather than individual computers),
the computers on the LAN do not need PPPoE software installed, since the ZyXEL Device
does that part of the task. Furthermore, with NAT, all of the LANs’ computers will have
access.
PPPoA
PPPoA stands for Point to Point Protocol over ATM Adaptation Layer 5 (AAL5). A PPPoA
connection functions like a dial-up Internet connection. The ZyXEL Device encapsulates the
PPP session based on RFC1483 and sends it through an ATM PVC (Permanent Virtual
Circuit) to the Internet Service Provider’s (ISP) DSLAM (Digital Subscriber Line (DSL)
Access Multiplexer). Please refer to RFC 2364 for more information on PPPoA. Refer to RFC
1661 for more information on PPP.
VCI This field displays the VCI value.
ENCAP This field displays the type of encapsulation.
Mux This field displays the multiplexing method.
IP Address This field displays the type of IP address.
Status This field displays the connection status of the PVC.
Table 16 Interface Setup > PVCs Summary (continued)
LABEL DESCRIPTION