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This section introduces you to a variety of
terms related to EIGRP and used throughout this chapter:
---
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
--- Each
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 (successor) routes to a destination from the topology
table and places these routes in the routing table. Each EIGRP router maintains
a topology table table for each network protocol.
Successor
--- A
route selected as the primary route to use to reach a destination.
Successors are the entries kept in the routing table.
Feasible successor --- A
backup route. These routes are selected at the same time the successors
are identified, but they are kept in the topology table. Multiple
feasible successors for a destination can be retained in the topology
table.
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