Which command will display all the EIGRP feasible successor routes kno...
Any secondary route to a remote network is considered a feasible successor, and those routes are only found in the topology table and used as backup routes in case of primary route failure. You can see the topology table with the show ip eigrp topology command.
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Which command will display all the EIGRP feasible successor routes kno...
Understanding EIGRP Feasible Successor Routes
EIGRP (Enhanced Interior Gateway Routing Protocol) is a dynamic routing protocol that uses a distance vector routing algorithm. It maintains a topology table to store information about all known routes, including feasible successors.
What are Feasible Successors?
- Feasible successors are backup routes in EIGRP.
- They are stored in the topology table and can be used when primary routes fail.
- A feasible successor is a route that has a feasible distance (FD) less than the reported distance (RD) of the current successor route.
Why Option C is Correct?
The command show ip eigrp topology is specifically designed to display the EIGRP topology table, which includes:
- All known routes, including successors and feasible successors.
- Metrics associated with each route, such as the feasible distance and reported distance.
- The status of each route and its ability to serve as a backup.
This command provides a comprehensive view of the routing information EIGRP has learned and helps in troubleshooting and verifying the state of routes.
Why Not Other Options?
- show ip route: Displays the routing table, not specifically EIGRP details.
- show ip eigrp summary: Gives a summary of EIGRP neighbors and statistics, not detailed routes.
- show ip eigrp adjacencies: Displays EIGRP neighbor relationships, lacking routing information.
Conclusion
Using show ip eigrp topology allows network engineers to view all feasible successors, making it the correct choice for understanding EIGRP’s backup routing capabilities.