Router 1
Current configuration:
!
version 11.2
service udp-small-servers
service tcp-small-servers
!
hostname Router1
no ip routing
!
enable password foo
!
username Router2 password bar
username Router3 password bar
isdn switch-type basic-5ess
!
interface Ethernet0
ip address 10.1.1.1 255.255.255.0
media-type 10BaseT
bridge-group 1
!
interface BRI0
no ip address
no ip mroute-cache
encapsulation ppp
no ip route-cache
dialer pool-member 1
ppp authentication chap
!
interface Dialer0
no ip address
no ip mroute-cache
encapsulation ppp
no ip route-cache
dialer remote-name Router2
dialer string 5552323
dialer pool 1
dialer-group 2
no fair-queue
no cdp enable
ppp authentication chap
bridge-group 1
!
interface Dialer1
no ip address
no ip mroute-cache
encapsulation ppp
no ip route-cache
dialer remote-name Router3
dialer string 5553434
dialer pool 1
dialer-group 2
no cdp enable
ppp authentication chap
bridge-group 1
!
dialer-list 2 protocol bridge permit
bridge 1 protocol ieee
end

Router 2
Current configuration:
!
version 11.2
service udp-small-servers
service tcp-small-servers
!
hostname Router2
no ip routing
!
enable password foo
!
username Router1 password bar
isdn switch-type basic-5ess
!
interface Ethernet0
ip address 10.1.1.2 255.255.255.0
no ip route-cache
bridge-group 1
!
interface BRI0
no ip address
encapsulation ppp
no ip route-cache
dialer pool-member 1
!
interface Dialer0
no ip address
encapsulation ppp
no ip route-cache
dialer remote-name Router1
dialer string 5551212
dialer pool 1
dialer-group 2
no fair-queue
no cdp enable
ppp authentication chap
bridge-group 1
!
dialer-list 2 protocol bridge permit
bridge 1 protocol ieee
!
end

Router 3
Current configuration:
!
version 11.2
service udp-small-servers
service tcp-small-servers
!
hostname Router3
no ip routing
!
username Router1 password bar
isdn switch-type basic-5ess
!
interface Ethernet0
ip address 10.1.1.3 255.255.255.0
no ip route-cache
bridge-group 1
!
interface BRI0
no ip address
encapsulation ppp
no ip route-cache
dialer pool-member 1
ppp authentication chap
!
interface Dialer0
no ip address
encapsulation ppp
no ip route-cache
dialer remote-name Router1
dialer string 5551212
dialer pool 1
dialer-group 2
no cdp enable
ppp authentication chap
bridge-group 1
!
dialer-list 2 protocol bridge permit
bridge 1 protocol ieee
!
end