How to Check Routing Table on Linux CentOS 6.2

In Linux operating system, routing table is used by the computer networks or servers to stores the routes of the destinations that responsible for forwarding. Routing tables contain a list of IP addresses and each of IP addresses identifies a network gateway. In this post, i will show you three ways to check and display the linux Routing Table. This command has been tested on CentOS 6.2 server.

1. Display routing table using “netstat -rn” :

[root@centos62 ~]# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
192.168.1.0     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         192.168.1.1     0.0.0.0         UG        0 0          0 eth0

2. Display routing table using “ip route show” :

[root@centos62 ~]# ip route show
192.168.1.0/24 dev eth0  proto kernel  scope link  src 192.168.1.44
169.254.0.0/16 dev eth0  scope link  metric 1002
default via 192.168.1.1 dev eth0

3. Display routing table using “route -n” :

[root@centos62 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     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         192.168.1.1     0.0.0.0         UG    0      0        0 eth0

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