PassFinder AP2520 VoIP Router/Gateway Operation Manual
Version 1.10 / Mar. 2002
AddPac Technology Co., Ltd.
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4.4.2.
PPPoE Configuration
Point to Point Protocol (PPP) is one of standard protocol to send data through
the WAN link. RFC1661 describes PPP specifications. Not only in the
synchronous WAN (serial) line but also in the asynchronous WAN (dial up line,)
PPP can be used. Since PPP is a standard rules, it guarantees interoperability
among different manufacturers’ devices.
Nowadays PPP extended to not only Serial Line but also Ethernet and ATM
Lines.
PPPoE(PPP over Ethernet) means PPP Protocol in the Ethernet Line.
PPP consists of two kinds of protocol as follows:
z
Link Control Protocol (LCP): LCP decides the encapsulation format, limits
the packet size, performs authentication in the link, decides normal
operation time and breakdown time, detects loop-back link faults and
other faults, and automatically terminates the link.
z
Network Control Protocol (NCP): NCP communicates with various higher
layer (network layer) protocol.
If a PPP encapsulation option is given to the PassFinder AP2520 Gateway, PPP
operation is possible. Current software installed in the Gateway supports
Challenge Handshake Authentication Protocol (CHAP,) the authentication
option that uses Password Authentication Protocol (PAP,) and the magic
number configuration option. Software always sends the magic number
configuration option. However, software sends the authentication option only
when the authentication option is set.
Information
