CentOS/RHEL:How To configure Static Routes or Persistent Routes
I would like to add a persistent route or static route on my centOS 7/6.5 or RHEL7/6.5 linux, HOw Do I create static routes so that the changes still can be there while system startup up? How to add persistent routes on CentOS 7 linux operating system ? this post will guide you how to configure static routes on your linux system.
You need to edit “/etc/sysconfig/network” configuration file to set default gatway or edit “/etc/sysconfig/network-scripts/route-eth0” network interface configuration file to set static gateway for particular network interface.
CentOS/RHEL check the current routing talbe
To display current kernel IP routing table by running the following command:
netstat -nr route -n ip route list
Outputs:
[root@devops temp]# netstat -nr Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 0.0.0.0 10.0.2.1 0.0.0.0 UG 0 0 0 enp0s3 0.0.0.0 10.0.2.2 0.0.0.0 UG 0 0 0 enp0s3 10.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 enp0s3 [root@devops temp]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default 10.0.2.1 0.0.0.0 UG 0 0 0 enp0s3 default 10.0.2.2 0.0.0.0 UG 1024 0 0 enp0s3 10.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 enp0s3 [root@devops temp]# ip route list default via 10.0.2.1 dev enp0s3 default via 10.0.2.2 dev enp0s3 proto static metric 1024 10.0.2.0/24 dev enp0s3 proto kernel scope link src 10.0.2.15
CentOS/RHEL configure static routes (persistent routes)
To set static default gateway on your system, you need to edit “/etc/sysconfig/network” file and add the below sample configuration content in.
NETWORKING=yes HOSTNAME=itsprite.com GATEWAY=10.0.2.1 #====>set the default gateway
then save an close above configuraton file.
next, restart the network service by issue the following command:
systemctl restart network.service
OR
systemctl restart network
