When RIP is configured on a router, it is run by default as Version 1, which means that all its interfaces will send and receive RIP-1 packets only. To run Version 2 of RIP, you must add the version 2 line under router rip. When a router running Version 1 receives a RIP update from a router running Version 2, it ignores the updates and does not install any routes in the routing table. For a router to accept a Version 2 packet, the interface must be con-figured to accept the RIP-2 updates.
Figure 3-7 shows the flowchart to follow to solve this problem based on this cause.
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