Cisco CCNA 2 Instructor Manual page 67

6.1.4 Configuring default route forwarding
Default routes are used to route packets with destinations that do not match any of the other
routes in the routing table. A default route is actually a special static route that uses the
following format:
ip route 0.0.0.0 0.0.0.0 [next-hop-address | outgoing interface]
Use the following steps to configure default routes:
1. Enter global configuration mode.
2. Type the ip route command with 0.0.0.0 for the destination network address and
0.0.0.0 for the subnet mask. The gateway for the default route can be either the local
router interface that connects to the outside networks or the IP address of the next-hop
router. In most cases, the IP address of the next hop router should be specified.
3. Exit global configuration mode.
4. Save the active configuration to NVRAM with the copy running-config
startup-config command.
Here is an example for Rt1.
Rt1#config terminal
Enter configuration commands, one per line. End with CNTL/Z.
Rt1(config)#ip route 0.0.0.0 0.0.0.0 192.168.1.2
Rt1(config)#exit
Rt1#
Rt1#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
Rt1#
Remind students of different types of router modes.
6.1.5 Verifying static route configuration
After static routes are configured it is important to verify that they are present in the routing
table and that routing occurs as expected. The show running-config command is used to
view the active configuration in NVRAM to verify that the static route was entered correctly.
66 - 238 CCNA 2: Routers and Routing Basics v3.1 Instructor Guide – Module 6
Copyright © 2004, Cisco Systems, Inc.