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<html>
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<title>Content</title>
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<body background="../../images/bg.gif" topmargin="0" leftmargin="0" marginheight="0" marginwidth="0" onLoad="window.focus();" link="#808080" vlink="#808080" alink="#808080">
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td bgcolor="#336666" width="18" valign="top">
<img border="0" src="../../images/content_lines.gif" width="16" height="25">
<img border="0" src="../../images/transdot.gif" width="2" height="1"></td>
<td bgcolor="#336666"><b><font face="Arial" size="2" color="#FFFFFF">3</font></b><font face="Arial" size="2" color="#FFFFFF"><b>.</b></font><b><font face="Arial" size="2" color="#FFFFFF">3</font></b></td>
<td bgcolor="#336666"><img border="0" src="../../images/transdot.gif" width="10" height="1"></td>
<td bgcolor="#336666" width="100%">
<font size="2" color="#FFFFFF"><b><span style="font-family: Arial">
Configuring PPP</span></b></font></td>
<td width="9" bgcolor="#336666"> </td>
</tr>
<tr>
<td bgcolor="#669999" height="25" width="18"> </td>
<td bgcolor="#669999" height="25"><b>
<font face="Arial" size="2" color="#FFFFFF">3.3.3</font></b></td>
<td bgcolor="#669999"><img border="0" src="../../images/transdot.gif" width="10" height="1"></td>
<td bgcolor="#669999" height="25" width="100%">
<font size="2" color="#FFFFFF"><b><span style="font-family: Arial">
Configuring PPP authentication</span></b></font></td>
<td bgcolor="#669999" height="25" width="9"> </td>
</tr></table>
<table border="0" cellpadding="0" cellspacing="0" width="95%" bordercolor="#111111">
<tr>
<td width="15"></td>
<td><font face="Arial" size="2">
The procedure outlined in the table describes how to
configure PPP encapsulation and PAP/CHAP authentication protocols.
<img border="0" src="../../images/1.gif" align="absmiddle" width="12" height="12">
<img border="0" src="../../images/2.gif" align="absmiddle" width="12" height="12"></font><p><font face="Arial" size="2">
Correct configuration is essential, since PAP and CHAP will use these
parameters to authenticate. </font></p>
<p><font face="Arial" size="2">
Figure
<img border="0" src="../../images/1.gif" align="absmiddle" width="12" height="12"> is an
example of a two-way PAP authentication configuration. Both routers
authenticate and are authenticated, so the PAP authentication commands
mirror each other. The PAP username and password that each router sends
must match those specified with the </font>
<font face="Courier New" size="2">
<b>username</b> <i>name</i> <b>password</b> <i>password</i></font><font face="Arial" size="2">
command of the other router.</font></p>
<p><font face="Arial" size="2">
PAP provides a simple method for a remote node to establish its identity
using a two-way handshake. This is done only upon initial link
establishment. The hostname on one router must match the username the
other router has configured. The passwords must also match.
<img border="0" src="../../images/3.gif" align="absmiddle" width="12" height="12"></font></p>
<p><font face="Arial" size="2">
CHAP is used to periodically verify the identity of the remote node
using a 3-way handshake. The hostname on one router must match the
username the other router has configured. The passwords must also match.
This is done upon initial link establishment and can be repeated any
time after the link has been established.
<img border="0" src="../../images/4.gif" align="absmiddle" width="12" height="12"></font></p>
<p>
<TABLE bgcolor="#B0AFAF" width="95%" border="0" cellspacing="0" cellpadding="0">
<TR>
<TD valign="top">
<TABLE bgcolor="#669999" width="100%" cellspacing="0" cellpadding="0" border="0">
<TR>
<TD width="5">
<img border="0" src="../../images/lab_toplft.gif" width="116" height="23"></TD>
<TD>
<IMG alt="" height="1" width="3" src="../../images/s.gif"></TD><TD align="right" valign="top">
<IMG alt="" src="../../images/corner_ur_7.gif" width="7" height="7"></TD>
</TR>
</TABLE>
<TABLE bgcolor="#B0AFAF" width="100%" cellspacing="0" cellpadding="0" border="0">
<TR>
<TD>
<TABLE width="100%" cellpadding="2" cellspacing="0" border="0" bordercolor="#111111">
<TR>
<TD bgcolor="#ffffff" width="15"> </TD>
<TD bgcolor="#ffffff"><font FACE="Arial" SIZE="2" COLOR="#000000">
<p><font color="#808080">
<a target="main" href="../lab3_3_3/index.html">
<img border="0" src="../../images/lab_icon.gif" width="25" height="25"> <b>
Lab Activity</b></a></font></p>
</font><font FACE="Arial" SIZE="2" COLOR="#808080">
<p>Lab Exercise: Configuring PPP Authentication</p>
<p><font color="#808080" FACE="Arial" SIZE="2">In this lab, the
student will</font> configure a serial interface on the Madrid and
Tokyo routers. </p>
</font><font FACE="Arial" SIZE="2" COLOR="#000000">
<p></TD>
</TR>
</TABLE>
</TD>
</TR>
</TABLE>
</TD>
</TR>
</TABLE>
<TABLE bgcolor="#669999" width="95%" cellspacing="0" cellpadding="0" border="0">
<TR>
<TD width="5">
<img border="0" src="../../images/lab_toplft.gif" width="116" height="23"></TD>
<TD>
<IMG alt="" height="1" width="3" src="../../images/s.gif"></TD><TD align="right" valign="top">
<IMG alt="" src="../../images/corner_ur_7.gif" width="7" height="7"></TD>
</TR>
</TABLE>
<TABLE bgcolor="#B0AFAF" width="95%" cellspacing="0" cellpadding="0" border="0">
<TR>
<TD>
<TABLE width="100%" cellpadding="2" cellspacing="0" border="0" bordercolor="#111111">
<TR>
<TD bgcolor="#ffffff" width="15"> </TD>
<TD bgcolor="#ffffff"><font FACE="Arial" SIZE="2" COLOR="#000000">
<p><font color="#808080">
<a href="javascript:void(0)" onClick="window.open('../../elabs/mod03/elab_3_3_3a/elab3_3_3a.html','Interactivity','width=740,height=390,toolbar=0,resizable=yes,scrollbars=0,screenX=26,screenY=38,left=26,top=38');">
<img border="0" src="../../images/lab_icon.gif" width="25" height="25"><b></a>
<a href="javascript:void(0)" onClick="window.open('../../elabs/mod03/elab_3_3_3a/elab3_3_3a.html','Interactivity','width=740,height=390,toolbar=0,resizable=yes,scrollbars=0,screenX=26,screenY=38,left=26,top=38');">Lab Activity</a></b></font></p>
</font><font FACE="Arial" SIZE="2" COLOR="#808080">
<p>e-Lab Activity: Configuring PPP Authentication</p>
</font><font FACE="Arial" SIZE="2" COLOR="#000000">
<p><font color="#808080">In this lab, the student will configure a serial
interface on the Madrid and Tokyo routers.</font></p>
<p></TD>
</TR>
</TABLE>
</TD>
</TR>
</TABLE>
<TABLE bgcolor="#669999" width="95%" cellspacing="0" cellpadding="0" border="0">
<TR>
<TD width="5">
<img border="0" src="../../images/lab_toplft.gif" width="116" height="23"></TD>
<TD>
<IMG alt="" height="1" width="3" src="../../images/s.gif"></TD><TD align="right" valign="top">
<IMG alt="" src="../../images/corner_ur_7.gif" width="7" height="7"></TD>
</TR>
</TABLE>
<TABLE bgcolor="#B0AFAF" width="95%" cellspacing="0" cellpadding="0" border="0">
<TR>
<TD>
<TABLE width="100%" cellpadding="2" cellspacing="0" border="0" bordercolor="#111111">
<TR>
<TD bgcolor="#ffffff" width="15"> </TD>
<TD bgcolor="#ffffff"><font FACE="Arial" SIZE="2" COLOR="#000000">
<p><font color="#808080">
<a href="javascript:void(0)" onClick="window.open('../../elabs/mod03/elab_3_3_3b/elab3_3_3b.html','Interactivity','width=740,height=390,toolbar=0,resizable=yes,scrollbars=0,screenX=26,screenY=38,left=26,top=38');">
<img border="0" src="../../images/lab_icon.gif" width="25" height="25"><b></a>
<a href="javascript:void(0)" onClick="window.open('../../elabs/mod03/elab_3_3_3b/elab3_3_3b.html','Interactivity','width=740,height=390,toolbar=0,resizable=yes,scrollbars=0,screenX=26,screenY=38,left=26,top=38');">Lab Activity</a></b></font></p>
</font><font FACE="Arial" SIZE="2" COLOR="#808080">
<p>e-Lab Activity:
</font><font FACE="Courier New" SIZE="2" COLOR="#808080">
<b>username </b> <i>name</i><b> password </b> <i>password</i></p>
</font><font FACE="Arial" SIZE="2" COLOR="#808080">
<p>In this activity, the student will demonstrate how to use the
</font><font FACE="Courier New" SIZE="2" COLOR="#808080">
<b>username </b> <i>name</i><b> password </b> <i>password</i></font><font FACE="Arial" SIZE="2" COLOR="#808080">
command.</p>
<font FACE="Arial" SIZE="2" COLOR="#000000">
<p></TD>
</TR>
</TABLE>
</TD>
</TR>
</TABLE>
<TABLE bgcolor="#B0AFAF" width="95%" border="0" cellspacing="0" cellpadding="0">
<TR>
<TD valign="top">
<TABLE bgcolor="#669999" width="100%" cellspacing="0" cellpadding="0" border="0">
<TR>
<TD width="5">
<img border="0" src="../../images/lab_toplft.gif" width="116" height="23"></TD>
<TD><IMG alt="" height="1" width="3" src="../../images/s.gif"></TD><TD align="right" valign="top">
<IMG alt="" src="../../images/corner_ur_7.gif" width="7" height="7"></TD>
</TR>
</TABLE>
<TABLE bgcolor="#B0AFAF" width="100%" cellspacing="0" cellpadding="0" border="0">
<TR>
<TD>
<TABLE width="100%" cellpadding="2" cellspacing="0" border="0" bordercolor="#111111">
<TR>
<TD bgcolor="#ffffff" width="15"> </TD>
<TD bgcolor="#ffffff"><font FACE="Arial" SIZE="2" COLOR="#000000">
<p><font color="#808080">
<img border="0" src="../../images/links_icon.gif" width="25" height="25">
<b>Web Links</b></font></p>
</font><font FACE="Arial" SIZE="2" COLOR="#808080">
<p>Configuring and Troubleshooting PPP Password Authentication Protocol (PAP)<p>
<a target="_blank" href="http://www.cisco.com/en/US/tech/tk713/tk507/technologies_tech_note09186a0080093c6f.shtml">
http://www.cisco.com/en/US/tech/tk713/
tk507/technologies_tech_ note09186a0080093c6f.shtml</a></font></p>
<IMG alt="" height="2" width="1" src="../../images/s.gif"></TD>
</TR>
</TABLE>
</TD>
</TR>
</TABLE>
</TD>
</TR>
</TABLE><p>
<font face="Arial" size="2"> </font><b><font face="Arial" size="2"> </font></b>
</td>
</tr>
</table>
</body>
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