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.
1. ip default-gateway
example: ip default-gateway 192.168.14.2
2. ip default-network
example: ip default-network 192.168.1.0
3. ip route 0.0.0.0
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
1. Enter into Global Configuration Mode
2. Set the default Network number as 192.168.17.0
R1(config)#ip default-network 192.168.17.0
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