Hi All I have two hosts. Host A and Host B Host A routing table ------------------------ [root at localhost ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 172.29.110.0 172.29.109.1 255.255.255.0 UG 0 0 0 eth0 172.29.109.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 0.0.0.0 172.29.109.1 0.0.0.0 UG 0 0 0 eth0 HOST A IP address : 172.29.109.254 Host B routing table ------------------------- [jatin at localhost ~]$ route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 172.29.110.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0 20.20.20.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth0 0.0.0.0 172.29.110.1 0.0.0.0 UG 0 0 0 eth0 HOST B Ip address : 172.29.110.93 Host B basically houses some simulated devices which are configured in the ip address range of 20.20.20.1 to 20.20.20.254. The netmask being used here is 255.255.255.0 I want to configure a static route on HOST A so that they can reach the simulated devices running on HOST B which are in the ip address range 20.20.20.1-20.20.20.254 , I am trying the following command but it does not configure the static route for me. [root at localhost ~]# route add -net 20.20.20.0 netmask 255.255.255.0 gw 172.29.110.93 SIOCADDRT: Network is unreachable Any help is greatly appreciated. Thanks Jatin