Cisco Certified Network Associate (CCNA) Practice Exam

Which command is used to display all EIGRP for IPv6 neighbors?

1. show ipv6 eigrp topology

2. show ipv6 eigrp neighbors

3. show ip route

4. show ipv6 protocols

The correct answer is: show ipv6 eigrp neighbors

The command to display all EIGRP (Enhanced Interior Gateway Routing Protocol) for IPv6 neighbors is indeed "show ipv6 eigrp neighbors." This command provides vital information about the neighboring routers participating in the EIGRP for IPv6 process. When executed, it lists the IPv6 addresses of all neighbors, along with the state of the neighbor relationship, which is crucial for understanding the dynamics of your routing environment. Using this command allows network administrators to verify which devices are communicating within the EIGRP domain and helps troubleshoot any connection issues that might arise. It is particularly important in an EIGRP configuration, as EIGRP relies on establishing neighbor relationships to share routing information and maintain a stable routing environment. The other commands, while useful for different purposes, do not serve the specific function of displaying EIGRP for IPv6 neighbor information. For instance, "show ipv6 eigrp topology" would display the EIGRP topology table, "show ip route" presents the routing table without details about EIGRP neighbors, and "show ipv6 protocols" shows the status of routing protocols, but not specifically the neighbor relationships. Thus, selecting "show ipv6 eigrp neighbors" is the appropriate choice to achieve the desired output