Configuring Dialer Profiles with DDR

Tip:

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 172.16.30.0 255.255.255.0 172.16.20.2
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 172.16.20.1 255.255.255.0
	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