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This section discusses several possible scenarios that can prevent RIP routes from getting installed in the routing table. This section is selected first in the troubleshooting list because the most common problem in RIP is that routes are not installed in the routing table. If the routes are not installed in the routing table, the router will not forward the packets to destinations that are not in the routing table. When this happens, it creates reachability problems. Users start complaining that they cannot reach a server or a printer. When you investigate this problem, the first thing to ask is, "Do I have a route for this destination that users are complaining about?" Three possibilities exist for routes not getting installed in the routing table:
The sender's problem will be discussed in the section "Troubleshooting RIP Route Advertisement." Two problems are related to RIP installation:
In the first problem, RIP is not installing any path to a specific network. In the second problem, RIP is not installing all paths to the network. Note that, in the second problem, the destination device is still reachable , but it's not listing all possible paths. |
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