<HTML ><HEAD ><TITLE >Compiling PPP support into the kernel</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="Linux PPP HOWTO" HREF="index.html"><LINK REL="UP" TITLE="Overview of what has to be done to get PPP working as a client" HREF="c463.html"><LINK REL="PREVIOUS" TITLE="Obtaining/Installing the software" HREF="x467.html"><LINK REL="NEXT" TITLE="Obtaining information from your ISP" HREF="x492.html"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" ><A HREF="http://www.linuxports.com/howto/ppp" TARGET="_top" >Linux PPP HOWTO</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="x467.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 9. Overview of what has to be done to get PPP working as a client</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="x492.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="AEN474">9.2. Compiling PPP support into the kernel</H1 ><P >Linux PPP operations come in two parts <P ></P ><UL ><LI ><P >the PPP daemon mentioned above</P ></LI ><LI ><P >kernel support for PPP</P ></LI ></UL > </P ><P >Most distributions seem to provide PPP kernel support in their default installation kernels, but others do not.</P ><P >If at boot your kernel reports messages like</P ><P > <TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><FONT COLOR="#000000" ><PRE CLASS="PROGRAMLISTING" >PPP Dynamic channel allocation code copyright 1995 Caldera, Inc. PPP line discipline registered.</PRE ></FONT ></TD ></TR ></TABLE > </P ><P >your kernel does have PPP support compiled in.</P ><P >That said, you may want to compile your own kernel, whatever your distribution, to provide the most efficient use of system resources given your particular hardware configuration. It is worth remembering that the kernel cannot be swapped out of memory and so keeping the kernel as small as possible has advantages on a memory limited machine.</P ><P >This document provides minimal kernel re-compilation instructions at section <A HREF="kernel-configuration.html" >Chapter 10</A >.</P ><P >For greater detail, see the Kernel-HOWTO at <A HREF="http://sunsite.unc.edu/mdw/HOWTO/Kernel-HOWTO.html" TARGET="_top" >The Linux Kernel HOWTO</A ></P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="x467.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="x492.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Obtaining/Installing the software</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="c463.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Obtaining information from your ISP</TD ></TR ></TABLE ></DIV ></BODY ></HTML >