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<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>
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<td bgcolor="#336666" width="100%"><b>
<font face="Arial" size="2" color="#FFFFFF">DDR Configuration</font></b></td>
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<td bgcolor="#669999" height="25"><b>
<font face="Arial" size="2" color="#FFFFFF">4.3.4</font></b></td>
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<td bgcolor="#669999" height="25" width="100%"><strong>
<font face="Arial" size="2" color="#FFFFFF">Specifying interesting traffic
for DDR</font></strong></td>
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<p><font face="Arial" size="2">DDR calls are triggered by interesting
traffic. This traffic can be defined as any of the following:</font></p>
<ul>
<li><font face="Arial" size="2">IP traffic of a particular protocol
type</font></li>
<li><font face="Arial" size="2">Packets with a particular source
address or destination </font></li>
<li><font face="Arial" size="2">Other criteria as defined by the
network administrator</font></li>
</ul>
<p><font face="Arial" size="2">Use the </font>
<font size="2" face="Courier New"><b>dialer-list </b></font><font face="Arial" size="2">
command to identify interesting traffic. The command syntax is as
follows:</font></p>
<blockquote>
<p><font face="Courier New" size="2">Router(config)#<b>dialer-list</b>
<i>dialer-group-num</i> <b>protocol</b> <i>protocol-name
</i>{<i>permit</i> | <i>deny</i> | <b>list</b> <i>access-list-number</i>} </font></p>
</blockquote>
<p><font face="Arial" size="2">The </font><i>
<font size="2" face="Courier New">dialer-group-num</font></i><font face="Arial" size="2">
is an integer between 1 and 10 that identifies the dialer list to the
router. The command </font><font size="2" face="Courier New"><b>
dialer-list 1 protocol ip permit</b></font><font face="Arial" size="2">
will allow all IP traffic to trigger a call.
<img border="0" src="../../images/1.gif" align="absmiddle" width="12" height="12"> Instead of
permitting all IP traffic, a dialer list can point to an access list
in order to specify exactly what types of traffic should bring up the
link. The reference to access list 101 in dialer list 2 prevents FTP
and Telnet traffic from activating the DDR link. Any other IP packet is
considered interesting, and will therefore initiate the DDR link.</font></p>
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<p><font color="#808080">
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<b>Web Links</b></font></p>
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<p>Configuration Examples<p>
<a target="_blank" href="http://www.cisco.com/en/US/tech/tk801/tk133/tech_configuration_examples_list.html">
http://www.cisco.com/en/US/tech/tk801/ tk133/tech_configuration_
examples_list.html</a></font></p>
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