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+<head>
+<meta http-equiv="Content-Language" content="en-us">
+<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
+
+
+
+<title>Content</title>
+<base target="_self">
+</head>
+
+<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"><font face="Arial" size="2" color="#FFFFFF"><b>4.</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%"><b>
+ <font face="Arial" size="2" color="#FFFFFF">DDR Configuration</font></b></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">4.3.3</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%"><strong>
+ <font face="Arial" size="2" color="#FFFFFF">Defining static routes for DDR</font></strong></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">To forward traffic, routers need to know
+ what route to use for a given destination. When a dynamic routing
+ protocol is used, the DDR interface will dial the remote site for
+ every routing update or hello message if these packets are defined as
+ interesting traffic. To prevent the frequent or constant activation of
+ the DDR link necessary to support dynamic routing protocols, configure
+ the necessary routes statically. </font>
+ <p><font face="Arial" size="2">To configure a static route for IP use
+ the following command:</font></p>
+ <blockquote>
+ <p><font face="Courier New" size="2">Router(config)#<b>ip route</b>
+ <i>net-prefix mask</i> {<i>address</i> | <i>interface</i>} [<i>distance</i>]
+ [<b>permanent</b>] </font></p>
+ </blockquote>
+ <p><font face="Arial" size="2">The Central router has a static route
+ to network 10.40.0.0 on the Home router.
+ <img border="0" src="../../images/1.gif" align="absmiddle" width="12" height="12"> The Home
+ router has two static routes defined for the two subnets on the
+ Central LAN. If the network attached to the Home router is a stub
+ network, then all non-local traffic should be sent to Central. A
+ default route is a better choice for the Home router in this instance.</font></p>
+ <blockquote>
+ <p><font face="Courier New" size="2">Home(config)#<b>ip route
+ 0.0.0.0 0.0.0.0 10.1.0.2</b></font></p>
+ </blockquote>
+ <p><font face="Arial" size="2">When configuring static routes,
+ consider the following:</font></p>
+ <ul>
+ <li><font face="Arial" size="2">By default, a static route will take
+ precedence over a dynamic route because of its lower administrative
+ distance. Without additional configuration, a dynamic route to a
+ network will be ignored if a static route is present in the routing
+ table for the same network.</font></li>
+ <li><font face="Arial" size="2">To reduce the number of static route
+ entries, define a summarized or default static route. <br>
+ </font></li>
+ </ul>
+ <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">
+ <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>Evaluating Backup Interfaces, Floating Static Routes, and Dialer Watch for DDR Backup<p>
+ <a target="_blank" href="http://www.cisco.com/en/US/tech/tk801/tk133/technologies_tech_note09186a008009457d.shtml">
+ http://www.cisco.com/en/US/tech/
+ tk801/tk133/technologies_tech_ note09186a008009457d.shtml</a></font></p>
+
+ <p>
+ <IMG alt="" height="2" width="1" src="../../images/s.gif"></p>
+ </TD>
+ </TR>
+ </TABLE>
+ </TD>
+ </TR>
+ </TABLE>
+ </TD>
+ </TR>
+ </TABLE><p>
+
+ </td>
+ </tr>
+ </table>
+
+</body>
+
+</html>
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