Routing redistribution can be tricky, and are prone to the following pitfalls:
- Routing loop – In relation to how to implement a redistribution, the router may send the routing information learned from an autonomous system back to the same autonomous system.Feedback is similar to the horizontal segmentation problem in distance vector routing technology.
Incompatible routing information — Each routing protocol uses different metrics to determine the best path. The route selected by the router may not be optimal because the measure value of the route cannot be accurately converted into the measure used by different routing protocols.
Convergence time is inconsistent – different routing protocols converge at different rates. For example, the PIP protocol converges more slowly than EIGRP, so if there is a link failure, the EIGRP network will learn this failure before the RIP network.
These potential trouble spots can be avoided by careful planning and implementation. Be sure to follow these important guidelines when configuring a reroute:
Know Your Network – Knowing which networks to redistribute will help us make the best decisions because there are many ways to do it.
Don’t Overlap Routing Protocol – Do not use two different protocols in the same Internet network. Instead, there should be clear boundaries between networks using different protocols;