<HTML ><HEAD ><TITLE >Special routing</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="After the link comes up - the /etc/ppp/ip-up script" HREF="ip-up.html"><LINK REL="PREVIOUS" TITLE="After the link comes up - the /etc/ppp/ip-up script" HREF="ip-up.html"><LINK REL="NEXT" TITLE="Handling email queues" HREF="x1448.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="ip-up.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 25. After the link comes up - the <TT CLASS="LITERAL" >/etc/ppp/ip-up</TT > script</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="x1448.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="AEN1442">25.1. Special routing</H1 ><P >If you are linking two LANs, you will need to set up specific routes to the 'foreign' LANs. This is easily done using the <TT CLASS="LITERAL" >/etc/ppp/ip-up</TT > script. The only difficulty arises if your machine handles multiple PPP links.</P ><P >This is because the <TT CLASS="LITERAL" >/etc/ppp/ip-up</TT > is executed for EVERY ppp connection that comes up, so you need to carefully execute the correct routing commands for the particular link that comes up - and not when any other link comes up!</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="ip-up.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="x1448.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >After the link comes up - the <TT CLASS="LITERAL" >/etc/ppp/ip-up</TT > script</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ip-up.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Handling email queues</TD ></TR ></TABLE ></DIV ></BODY ></HTML >