A.. ip command can be used for the following tasks :
=> Show / manipulate routing
=> Show / manipulate devices
=> Policy routing
=> Tunnels
Task: View / Display Routing Table
Type the following command:$ ip route showOutput:
10.0.31.18 dev ppp0 proto kernel scope link src 10.1.3.103Each entry is nothing but an entry in the routing table (Linux kernel routing table). For example. following line represents the route for the local network. All network packets to a system in the same network are sent directly through the device ra0:
192.168.2.0/24 dev eth0 proto kernel scope link src 192.168.2.1
192.168.1.0/24 dev ra0 proto kernel scope link src 192.168.1.106
169.254.0.0/16 dev eth0 scope link metric 1000
10.0.0.0/8 dev ppp0 scope link
default via 192.168.1.1 dev ra0 metric 100
192.168.1.0/24 dev ra0 proto kernel scope link src 192.168.1.106Our default route is set via ra0 interface i.e. all network packets that cannot be sent according to the previous entries of the routing table are sent through the gateway defined in this entry i.e 192.168.1.1 is our default gateway.
Task: Set a Route to the Locally Connected Network eth0
Type the following command to sent all packets to the local network 192.168.1.0 directly through the device eth0:, enter:# ip route add 192.168.1.0/24 dev eth0Task: Set a default route
All network packets that cannot be sent according to the previous entries of the routing table are sent through the following default gateway# ip route add default via 192.168.1.254Task: Delete route from table
Type the following command# ip route delete 192.168.1.0/24 dev eth0
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