ZyXEL P-663HN-51 User Guide - Page 59
PPPoE, 5.5.3 MER, 5.5.4 IPoA, 5.5.5 Bridging, 5.6 Encapsulation, PPPoE, Bridging
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Chapter 5 WAN Setup 5.5.2 PPPoE PPPoE (Point to Point Protocol over Ethernet) provides access control and billing functionality in a manner similar to dial-up services using PPP. The ZyXEL Device bridges a PPP session over Ethernet (PPP over Ethernet, RFC 2516) from your computer to an ATM PVC (Permanent Virtual Circuit) which connects to ADSL 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. 5.5.3 MER MER (MAC Encapsulated Routing) is only implemented with the IP network protocol. IP packets are routed between the Ethernet interface and the WAN interface and then formatted so that they can be understood in a bridged environment. For instance, it encapsulates routed Ethernet frames into bridged ATM cells. 5.5.4 IPoA IPoA (Internet Protocol over ATM) in 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 (LLCbased 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. 5.5.5 Bridging With bridging the ZyXEL Device has a static IP address for the connection. The ZyXEL Device passes traffic through to another device (a computer or router for example) that handles authenticating with the ISP. 5.6 Encapsulation There are two conventions to identify what protocols the virtual circuit (VC) is carrying. Be sure to use the encapsulation method required by your ISP. P-663HN-51 User's Guide 59