نحوه تنظیم Static Route بصورت ثابت بر روی سرور لینوکس

To keep the Static Route persistent on Linux or you want to add the route entries to the network

 script files (not using the route command) then all you need to do is to edit the file

/etc/network/interfaces

and the static routes in the following format:

up route add [-net|-host] <host/net>/<mask> gw <host/IP> dev <Interface>

Example

up route add -net 172.20.11.0/16 gw 172.20.10.254 dev eth1

And the file will like the following

sudo cat /etc/network/interfaces

The output should show something like this

sudo cat /etc/network/interfaces

The output should show something like this

# This file describes the network interfaces available on your system

# and how to activate them. For more information, see interfaces(5).

# The loopback network interface

auto lo

iface lo inet loopback

# The primary network interface

auto eth0 eth1

iface eth0 inet static

address 192.168.1.2

netmask 255.255.255.0

network 192.168.1.0

broadcast 192.168.1.255

gateway 192.168.1.254

# dns-* options are implemented by the resolvconf package, if installed

iface eth1 inet static

address 172.20.10.1

netmask 255.255.255.0

broadcast 172.20.10.255

gateway 172.20.10.254

# static route

up route add -net 172.20.11.0/16 gw 172.20.10.254 dev eth1

The above has 2 Ethernet interfaces and the static route is added to the interface eth1.

For the change to /etc/network/interface to take effect. please restart the "networking" service as follows:

sudo /etc/init.d/networking restart

NOTE: If you added the route already using the "route" then there is no need to restart the networking service because, the next time server is restarted this takes effect.