ZyXEL Communications Prestige 650HW - Manual (Page 61)

Prestige 650HW ADSL Router User’s Guide
Internet Access 3-17
3.13.2 PPP over Ethernet
PPPoE provides access control and billing functionality in a manner similar to dial-up services using PPP.
The Prestige bridges a PPP session over Ethernet (PPP over Ethernet, RFC 2516) from your computer to an
ATM PVC (Permanent Virtual Circuit) which connects to an xDSL Access Concentrator where the PPP
session terminates. One PVC can support any number of PPP sessions from your LAN. For more
information on PPPoE, see the Appendices.
3.13.3 PPPoA
Please refer to RFC 2364 for more information on PPP over ATM Adaptation Layer 5 (AAL5). Refer to
RFC 1661 for more information on PPP.
3.13.4 RFC 1483
RFC 1483 describes two methods for Multiprotocol Encapsulation over ATM Adaptation Layer 5 (AAL5).
The first method allows multiplexing of multiple protocols over a single ATM virtual circuit (LLC-based
multiplexing) and the second method assumes that each protocol is carried over a separate ATM virtual
circuit (VC-based multiplexing). Please refer to the RFC for more detailed information.
3.14 IP Address Assignment
A static IP is a fixed IP that your ISP gives you. A dynamic IP is not fixed; the ISP assigns you a different
one each time. The Single User Account feature can be enabled or disabled if you have either a dynamic or
static IP. However the encapsulation method assigned influences your choices for IP Address and ENET
ENCAP Gateway.
3.14.1 Using PPPoA or PPPoE Encapsulation
If you have a dynamic IP, then the IP Address and ENET ENCAP Gateway fields are not applicable (N/A).
If you have a static IP, then you only need to fill in the IP Address field and not the ENET ENCAP
Gateway field.
3.14.2 Using RFC 1483 Encapsulation
In this case the IP Address Assignment must be static with the same requirements for the IP Address and
ENET ENCAP Gateway fields as stated above.
3.14.3 Using ENET ENCAP Encapsulation
In this case you can have either a static or dynamic IP. For a static IP you must fill in all the IP Address and
ENET ENCAP Gateway fields as supplied by your ISP. However for a dynamic IP, the Prestige acts as a