Content

| 5.1 |  | EIGRP Fundamentals |
| 5.1.3 |  | EIGRP terminology |

EIGRP routers keep route and topology information readily available in RAM so they can react quickly to changes. Like OSPF, EIGRP keeps this information in several tables, or databases. The following terms are related to EIGRP and its tables and are used throughout this module:

- Neighbor table – Each EIGRP router maintains a neighbor table that lists adjacent routers. This table is comparable to the adjacency database used by OSPF. There is a neighbor table for each protocol that EIGRP supports.
- Topology table – Every EIGRP router maintains a topology table for each configured network protocol. This table includes route entries for all destinations that the router has learned. All learned routes to a destination are maintained in the topology table.
- Routing table – EIGRP chooses the best routes to a destination from the topology table and places these routes in the routing table. Each EIGRP router maintains a routing table for each network protocol.
- Successor – A successor is a route selected as the primary route to use to reach a destination. Successors are the entries kept in the routing table. Multiple successors for a destination can be retained in the routing table.
- Feasible successor – A feasible successor is a backup route. These routes are selected at the same time the successors are identified, but are kept in the topology table. Multiple feasible successors for a destination can be retained in the topology table.

| Interactive Media Activity Matching: EIGRP Terminology Upon completion of this activity, the student will be able to identify the EIGRP terminology.