Configuring Default Route

Description: ip default-gateway command is used when ip routing is disabled on a Cisco router. Use the ip default-network and ip route 0.0.0.0 0.0.0.0 commands are used to set the gateway of last resort on Cisco routers that have ip routing enabled.

Command syntax: 

1. ip default-gateway <ip address>
example: ip default-gateway 192.168.14.2

2. ip default-network <ip address>
example: ip default-network 192.168.1.0

3. ip route 0.0.0.0 0.0.0.0 <ip-address>
example: ip route 0.0.0.0 0.0.0.0 192.168.5.1

here 192.168.5.1 is the gateway of last resort to network 0.0.0.0

Instructions:

1. Enter into Global Configuration Mode

2. Set the default Network number as 192.168.17.0