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166 - How to use iP route

Submitted by admin on Fri, 05/06/2011 - 12:26

ip route provides management tools for manipulating any of the routing tables. Operations include displaying routes or
the routing cache, adding routes, deleting routes, modifying existing routes, and fetching a route and clearing an entire
routing table or the routing cache.

1. View the main routing table with ip route show.

# route -n (or, ip route show)

2. Using ip route add to populate a routing table.

# ip route add192.168.1.0/24 dev eth0

# ip route add 192.168.2.252/32 dev eth1 src 192.168.2.110

# ip route add default via 192.168.1.254

3. Removing routes with ip route del.

# ip route delete 192.168.2.252/32 dev eth1 src 192.168.2.180

4. Altering existing routes with ip route change.

# ip route change default via 192.168.17.1 dev eth0

5. CIDR (Classless Inter-Domain Routing).

192.168.17.0/24   --   From 192.168.17.0   To 192.168.17.255
192.168.17.252/32 --   Only 192.168.17.252