::Router 1::

interface Ethernet0/0
 ip address 192.168.245.1 255.255.255.0
 no ip directed-broadcast
 no ip route-cache
 no ip mroute-cache
 no cdp enable
!
interface BRI0/0
 ip address 192.168.240.254 255.255.255.0
 no ip directed-broadcast
 no ip route-cache
 no ip mroute-cache
 isdn switch-type basic-ni
 isdn spid1 xxxxxxxxxxxxx1
 isdn spid2 xxxxxxxxxxxxx1
 no cdp enable

ip classless
ip route 0.0.0.0 0.0.0.0 192.168.240.1

::Router 2::

interface Ethernet0/0
 ip address 128.128.2.55 255.255.255.0
 no ip directed-broadcast
 no ip mroute-cache
 full-duplex
 no cdp enable
!
interface BRI0/0
 ip address 192.168.240.1 255.255.255.0
 no ip directed-broadcast
 no ip mroute-cache
 isdn switch-type basic-ni
 isdn spid1 asdgasdgasdgasd
 isdn spid2 asdgasdgasgdsag

ip classless
ip route 0.0.0.0 0.0.0.0 192.168.240.254