Configuring static and default routing

Static Routing

When using the ip route command, you can identify where packets should be routed to in two ways:

• The next-hop address
• The exit interface

Both ways are shown in both the "Configuration Example: Static Routes" section and the "Default Routing" section.

Router(config)#ip route 172.16.20.0 255.255.255.0 172.16.10.2	172.16.20.0 = destination network 255.255.255.0 = subnet mask 172.16.10.2 = next-hop address Read this to say: To get to the destination network of 172.16.20.0, with a subnet mask of 255.255.255.0, send all packets to 172.16.10.2
Router(config)#ip route 172.16.20.0 255.255.255.0 s0/0	172.16.20.0 = destination network 255.255.255.0 = subnet mask s0/0 = exit interface Read this to say: To get to the destination network of 172.16.20.0, with a subnet mask of 255.255.255.0, send all packets out interface Serial 0/0

Default Routing

Router(config)#ip route 0.0.0.0 0.0.0.0 172.16.10.2	Send all packets destined for networks not in my routing   table to 172.16.10.2
Router(config)#ip route 0.0.0.0 0.0.0.0 s0/0	Send all packets destined for networks not in my routing table out my Serial 0/0 interface

Verifying Static Route

Router#show ip route

Displays contents of IP routing table

   NOTE

  The codes to the left of the routes in the table tell you from where the router learned the routes. A   static route is described by the letter S.