How to Check Routing Tables on Fedora 16

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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 on Fedora 16 server.

By using Route Command :
Route manipulates the kernel’s IP routing tables. Its primary use is to set up static routes to specific hosts or networks via an interface after it has been configured.

By using netstat command :
Netstat prints information about the Linux networking subsystem such as network connections, routing tables and interface statistics.

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

[[email protected] ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0        0 p3p1
169.254.0.0     0.0.0.0         255.255.0.0     U     1002   0        0 p3p1
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 p3p1

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

[[email protected] ~]# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         192.168.1.1     0.0.0.0         UG        0 0          0 p3p1
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 p3p1
192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 p3p1

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

[[email protected] ~]# ip route show
default via 192.168.1.1 dev p3p1
169.254.0.0/16 dev p3p1  scope link  metric 1002
192.168.1.0/24 dev p3p1  proto kernel  scope link  src 192.168.1.47

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