Cisco Certified Network Associate (CCNA) Practice Exam

To configure EIGRP timers, which command is used to set hello interval?

1. ip hello-interval eigrp AS NUMBER

2. set hello-interval eigrp AS NUMBER

3. configure eigrp hello-interval

4. eigrp set hello AS NUMBER

The correct answer is: ip hello-interval eigrp AS NUMBER

The command used to set the hello interval for EIGRP (Enhanced Interior Gateway Routing Protocol) is indeed a specific syntax that involves the use of "ip hello-interval eigrp". When configuring EIGRP, the hello interval is the period at which EIGRP routers send hello packets to one another. This interval helps maintain neighbor relationships and assists in the functionality of the routing protocol. The correct command format allows for the specification of the autonomous system (AS) number, which is crucial, as routers in the same EIGRP domain must be within the same AS to establish connections. By using "ip hello-interval eigrp AS NUMBER", the network administrator can customize how often these hello packets are sent, enhancing the control over network convergence and responsiveness in different network scenarios. Understanding this command is important for network configuration and performance optimization. If a different command format were used, it might not adhere to the standards of EIGRP configuration and would not successfully implement the desired changes to the hello timer.