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PPP currently supports the following control protocols:
v AppleTalk Control Protocol (ATCP)
v DECnet Protocol Control Protocol (DNCP)
v Banyan VINES Control Protocol (BVCP)
v Bridging protocols (BCP, NBCP, and NBFCP)
v Internet Protocol Control Protocol (IPCP)
v Internet Protocol Version 6 Control Protocol (IPv6CP)
v IPX Control Protocol (IPXCP)
v APPN HPR Control Protocol (APPN HPRCP)
v APPN ISR Control Protocol (APPN ISRCP)
v OSI Control Protocol (OSICP)
Each end starts by sending LCP packets to configure and test the data link. After
the link has been established, PPP sends NCP packets to choose and configure
one or more network layer protocols. After network layer protocols have been
configured, datagrams from each network layer can be sent over the link. The next
sections explain these concepts in more detail.
PPP Data Link Layer Frame Structure
PPP transmits data frames that have the same structure as High-level Data Link
Control (HDLC) frames. PPP uses a byte-oriented transmission method with a
single-frame format for all data and control exchanges. Figure 27 on page 451
illustrates the PPP frame structure and is followed by a detailed description of each
field.
Serial Communications Link
Point-to-Point Serial Link
between 2 Hosts
Point-to-Point Serial Links
among several Hosts
Host
Host
Host
Host
Host
Link 1 Link 2
Link3
Figure 26. Examples of Point-to-Point Links
Using PPP
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MRS V3.2 Software User’s Guide
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