Routing protocols will certainly come up on your CCENT certification exam. This section reviews popular commands that deal with routing and routing protocols, such as RIPv1 and RIPv2.
| Command(s) | Result |
|---|---|
| ip routing | Enables routing on the router. Should be on by default. |
| no ip routing | Disables routing on the router. |
| show ip route | Displays the routing table. |
| ip route 23.0.0.0 255.0.0.0 22.0.0.2 | Adds a static route to the router for the 23.0.0.0 network and sends any data for that network to the 22.0.0.2 address (next hop). |
| no ip route 23.0.0.0 255.0.0.0 22.0.0.2 | Deletes the static route from the routing table. |
| ip route 0.0.0.0 0.0.0.0 22.0.0.2 | Sets the gateway of last resort on the router to forward any packets with unknown destinations to the 22.0.0.2 address. |
| ROUTERB>enable ROUTERB#config term ROUTERB(config)#router rip ROUTERB(config-router)#network 26.0.0.0 ROUTERB(config-router)#network 27.0.0.0 | Configures the router for RIPv1. RIP is a dynamic routing protocol that is used to share routing information with other routers running RIP. In this example, RIP will share knowledge of the 26.0.0.0 and the 27.0.0.0 networks. |
| ROUTERB>enable ROUTERB#config term ROUTERB(config)#router rip ROUTERB(config-router)#network 26.0.0.0 ROUTERB(config-router)#network 27.0.0.0 ROUTERB(config-router)#version 2 | To configure the router for RIPv2, you use the same commands but add the "version 2" command at the end. |
| show ip protocols | Display what routing protocols are running on the router. |
| debug ip rip | Enable RIP debugging, which will display RIP related messages on the screen as RIP-related events occur (packets are sent and received). |
| no debug all | Turns off debugging once you are done troubleshooting RIP. |
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