Troubleshooting RIP Routes Installation

‚  < ‚  Free Open Study ‚  > ‚  

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:

  • Receiver's problem ‚ The router is receiving RIP updates but is not installing the RIP routes.

  • Intermediate media problem (Layer 2) ‚ Mostly related to Layer 2, the sender has sent the RIP updates, but they got lost in the middle and the receiver didn't receive them.

  • Sender's problem ‚ The sender is not even advertising RIP routes, so the receiving side is not seeing any RIP routes 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:

  • RIP routes are not in the routing table.

  • RIP is not installing all equal-cost path routes.

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.

‚  < ‚  Free Open Study ‚  > ‚  


Troubleshooting IP Routing Protocols
Troubleshooting IP Routing Protocols (CCIE Professional Development Series)
ISBN: 1587050196
EAN: 2147483647
Year: 2002
Pages: 260

flylib.com © 2008-2017.
If you may any questions please contact us: flylib@qtcs.net