CCNA ICND2 Study Guide by Lammle Todd

Author:Lammle, Todd [Lammle, Todd]
Language: eng
Format: epub
Publisher: Wiley
Published: 2013-09-16T14:00:00+00:00

A feasible successor is a backup route and is stored in the topology table. A successor route is stored in the topology table and is copied and placed in the routing table.

Successor A successor route—again, think “successful”—is the best route to a remote network. A successor route is the lowest cost to a destination and stored in the topology table along with everything else. However, this particular best route is copied and placed in the routing table so IP can use it to get to the remote network. The successor route is backed up by a feasible successor route, which is also stored in the topology table, if there’s one available. The routing table contains only successor routes; the topology table contains successor and feasible successor routes.

Figure 5-4 illustrates that the SF and NY routers each have subnets of the 10.0.0.0 network and the Corp router has two paths to get to this network.

Figure 5-4: The tables used by EIGRP

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