route addHow to add static route

The method is: 1. Add the route to the host, "# route add –host 192.168.1.11 dev eth0"; 2. Add the route to the network, "# route add –net 192.168.1.0/24 eth1 ".

#The operating environment of this tutorial: centos7 system, thinkpad t480 computer.

The specific operation method is as follows:

1. Use the route command to add a route.

The route added using the route command will become invalid after the machine is restarted or the network card is restarted. Method:

//Route added to the host

# route add –host 192.168.1.11 dev eth0 
# route add –host 192.168.1.12 gw 192.168.1.1

//Route added to the network

# route add –net 192.168.1.11 netmask 255.255.255.0 eth0 
# route add –net 192.168.1.11 netmask 255.255.255.0 gw 192.168.1.1 
# route add –net 192.168.1.0/24 eth1

//Add default gateway

# route add default gw 192.168.2.1

//Delete route

# route del –host 192.168.1.11 dev eth0

2: How to set up permanent routing under Linux:

./etc/sysconfig/static-routes : 
any net 192.168.3.0/24 gw 192.168.3.254 
any net 10.250.228.128 netmask 255.255.255.192 gw 10.250.228.129

The method of using static-routes is the best. It will take effect regardless of restarting the system and service network restart.

What is the static-routes file? This is a file called when the network script is executed. This file is placed in the /etc/sysconfig directory. Its location in the network script is:

# Add non interface-specific static-routes.
if [ -f /etc/sysconfig/static-routes ]; then
grep "^any" /etc/sysconfig/static-routes | while read ignore args ; do
/sbin/route add -$args
done
fi

As you can see from this script, this is the way to add static routes. The writing method of static-routes is

any net 192.168.0.0/16 gw 网关ip。

(recommended learning: linux tutorial)

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