centos 7 static ip and interface up on boot

Create a file with the name route-interface in /etc/sysconfig/network-scripts, such as: nano /etc/sysconfig/network-scripts/route-eth0 To make the route permament, you need to create a static route configuration file.

Ip route add command will only persist until the next reboot or interface/network settings restart. If you wish to add one temporarily, simply run the ip route add command with the right network information: ip route add 172.16.5.0/24 via 10.0.0.101 dev eth0ġ72.16.5.0 is the network you wish to access.ġ0.0.0.101 is the secondary router to which you are adding a default routeĮth0 is the network interface assigned to your main network (in this case, 10.0.0.0/8) To do this, you need to add a static route. Therefore, you need to point your OS to the secondary router for any IP addresses located in the 172.16.5.0-255 address space. However, you have a 172.16.5.0 /24 network that is accessible only through a secondary router, which has the IP address 10.0.0.101 on the main network. another office department) that is NOT accessible via the default gateway?įor example, your internet router may be located at 10.0.0.1 and it is serving your local network, 10.0.0.0/8. The gateway will then attempt to forward packets elsewhere, such as the internet, or another broadcast domain.īut what if you have a separate network (i.e. If the computer cannot find the specific IP address on its local network (aka broadcast domain), as defined by its subnet, it will forward any packets headed to that IP address to the default gateway.

If your computer is on a network and is not directly connected to the internet, it will be configured with what is called a default gateway, which is usually a router. To make it persist system or network settings restart, create a route-ifname file for an interface through which the subnet is accessed, in this case eth0: nano /etc/sysconfig/network-scripts/route-eth0Īdd the line with the network settings for the other subnet: Adding a static route to a different subnet that cannot be accessed through your default gateway.

Centos 7 static ip and interface up on boot