Hello Anvar,
the routing part is relative easy:
four default static routes make the job
ip route 0.0.0.0 0.0.0.0 dialer1
ip route 0.0.0.0 0.0.0.0 dialer2
ip route 0.0.0.0 0.0.0.0 dialer3
ip route 0.0.0.0 0.0.0.0 dialer4
the most difficult part is to use NAT:
when accessing the internet private ip addresses need to be translated
given a 19268.10.0/24 internal lan you can use route-map based NAT
int fas0/0
ip nat inside
int dialer 1-4
ip nat outside
you can map 1/4 of hosts on each link
route-map nat-link1 permit 10
match ip address 1
set interface dialer1
route-map nat-link2 permit 10
match ip address 2
set interface dialer2
and son
where
access-list 1 permit 192.168.10.0 0.0.0.63
access-list 2 permit 192.168.10.64 0.0.0.63
access-list 3 permit 192.168.10.128 0.0.0.63
access-list 4 permit 192.168.110.192 0.0.0.63
ip nat inside source route-map nat-link1 interface dialer1 overload
ip nat inside source route-map nat-link2 interface dialer2 overload
ip nat inside source route-map nat-link3 interface dialer3 overload
ip nat inside source route-map nat-link4 interface dialer4 overload
Hope to help
Giuseppe
