DDR calls are triggered by interesting traffic. This traffic can be defined as any of the following:

• IP traffic of a particular protocol type
• Packets with a particular source address or destination
• Other criteria as defined by the network administrator

Use the dialer-list command to identify interesting traffic. The command syntax is as follows:

Router(config)#dialer-list dialer-group-num protocol protocol-name {permit | deny | list access-list-number}

The dialer-group-num is an integer between 1 and 10 that identifies the dialer list to the router. The command dialer-list 1 protocol ip permit will allow all IP traffic to trigger a call. 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.

Web Links Configuration Examples http://www.cisco.com/en/US/tech/tk801/ tk133/tech_configuration_ examples_list.html