Configuring Dialer Profiles with DDR


Using a dial map applies the configuration directly to the interface. Using a dialer profile allows you to have a more dynamic configurationthe physical interface will act differently depending on your specific call requirements, such as the following:

  • Do you want HDLC encapsulation instead of PPP?

  • Do you want an extended ACL rather than a standard one?

  • Do you want a different idle-timeout threshold?

Step 1: Configure static routes on router.


Using static routes rather than dynamic routing will save on ISDN costs. The link will not always be up because routing updates trigger link to remain become active


Edmonton#config t


Edmonton(config)#ip route


Step 2 (Option 1): Define interesting traffic without access lists.


Edmonton(config)#dialer-list 1 protocol ip permit


Edmonton(config)#int dialer 0

Go to virtual dialer interface as opposed to physical BRI 0 interface


Edmonton(config-if)#dialer-group 1


Step 2 (Option 2): Define interesting traffic with access lists.


Edmonton(config)#dialer-list 2 protocol ip list 150


Edmonton(config)#access-list 150 deny udp any any eq tftp


Edmonton(config)#access-list 150 deny tcp any any eq telnet


Edmonton(config)#access-list 150 permit ip any any


Edmonton(config)#int dialer 0

Go to virtual dialer interface as opposed to physical BRI 0 interface.


Edmonton(config-if)#dialer-group 2


Step 3: Configure DDR dialer information.


Edmonton(config)#username Calgary password academy

For PPP encapsulation across ISDN (optional)


Edmonton(config)#int dialer 0


Edmonton(config-if)#ip address


Edmonton(config-if)#int bri 0


Edmonton(config-if)#encap ppp

Turns on PPP encapsulation


Edmonton(config-if)#ppp authentication chap

Turns on CHAP authentication


Edmonton(config-if)#dialer idle-timeout 150

Specifies the number of seconds after last interesting traffic is sent before the call terminates. Default is 120 seconds.

Step 4: Configure dialer information.


Edmonton(config)#int dialer 0

Enters dialer interface


Edmonton(config-if)#dialer remote name Calgary


Edmonton(config-if)#dialer string 5552000


Step 5: Associate dialer profile.


Edmonton(config)#interface bri 0


Edmonton(config-if)#dialer pool-member 1

Or 2 if using dial-group 2


Edmonton(config-if)#interface dialer 0


Edmonton(config-if)#dialer pool 1

Or 2 if using dial-group 2

CCNA Self-Study(c) CCNA Portable Command Guide
CCNA Portable Command Guide
ISBN: 1587201585
EAN: 2147483647
Year: 2006
Pages: 261
Authors: Scott Empson

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