Configure the Bri interfaces on each routers
R1(config)#interface bri 0
R1(config-if)#no ip address
R1(config-if)#isdn switch-type basic-ni
R1(config-if)#isdn spid1 100000001000100
R1(config-if)#isdn spid2 100000001100100
R1(config-if)#dialer pool-authorise-user 1
R1(config-if)#encapsulation “ppp” or
R1(config-if)#ppp authentication chap
R2(config)#interface bri 0
R2(config-if)#no ip address
R2(config-if)#isdn switch-type basic-ni
R2(config-if)#isdn spid1 100000002000100
R2(config-if)#isdn spid2 100000002100100
R2(config-if)#dialer pool-authorise-user 1
R2(config-if)#encapsulation “ppp” or
R2(config-if)#ppp authentication chap
Create your access-list
R1(config)#access-list 102 permit ip any any
R1(config)#dialer-list 1 protocol ip list 102
R2(config)#access-list 102 permit ip any any
R2(config)#dialer-list 1 protocol ip list 102
Create users and the Dialer interface that is associate with the dialer pool and the bri0 interface ont both routers
R1(config)#username R2 password cisco
R1(config)#interface dialer 1
R1(config-if)#ip address ( ip address )
R1(config-if)#encapsulation ppp
R1(config-if)#dialer pool 1
R1(config-if)#dialer remote-name R2
R1(config-if)#dialer string 1000010
R1(config-if)#dialer-group 1
R1(config-if)#ppp authentication chap
R2(config)#username R1 password cisco
R2(config)#interface dialer 1
R2(config-if)#ip address ( ip address )
R2(config-if)#encapsulation ppp
R2(config-if)#dialer pool 1
R2(config-if)#dialer remote-name R1
R2(config-if)#dialer string 1000020
R2(config-if)#dialer-group 1
R2(config-if)#ppp authentication chap
Fail over Routing with Static route !
R1(config)#ip route ( local ip address ) ( destination ip address )
