Router 1
Route add –net 10.252.105.0 netmask 255.255.255.0 gw 172.167.2.2 Route add default gw 172.167.2.2
Echo “1” > /proc/sys/net/ipv4/ip_forward Router 2
Route add –net 192.168.2.0 netmask 255.255.255.0 gw 172.167.2.1 Route add default gw 10.252.105.1
Echo “1” > /proc/sys/net/ipv4/ip_forward PC 1
Route add default gw 192.168.2.1 PC2
Route add –net 192.168.2.0 netmask 255.255.255.0 gw 172.167.2.1 Route add default gw 172.167.2.2
PC3
Route add –net 192.168.2.0 netmask 255.255.255.0 gw 10.252.105.132 Route add –net 172.167.2.0 netmask 255.255.255.0
Gw 10.252.105.132
Route add default gw 10.252.105.1
.1 .1 .2 .132 .1 INTERNET
PC1 PC2 PC3
10.252.105.0/24 172.167.2.0/24
192.168.2.0/24
Router 3 Router 2
Router 1
.10
.10