Content

| 5.1 |  | Troubleshooting Network Layer Problems |
| 5.1.3 |  | Static routes, dynamic routing, summarization, redistribution, and combinations |

Most networks are not configured with only static routes or with only one type of dynamic routing protocol. Most networks are a complex combination of static routes, one or more dynamic routing protocols, manual and automatic route aggregations, redistributions, distribute-lists, access lists, and more. Understanding how these protocols and techniques work together and what affect they can have on each other is essential in understanding and troubleshooting networks.

The course examines these issues separately and, at times, in combination. It is impossible to cover every possible scenario and combination. There are entire books on each one of these topics, so there is no way to cover it all in this module or this course.

What is important is to have a thorough understanding of the routing protocols and configurations used in many networks. The more time spent now understanding how the routing protocols function and how they interoperate with other routing protocols, static routes, and the routing table, the less time will be spent later trying to troubleshoot networks in the field.