Cisco Certified Network Associate (CCNA) Practice Exam

What command is used to change the hello and hold timers on an EIGRP for IPv6 router?

1. ipv6 router eigrp AS NUMBER

2. interface INTERFACE

3. show ipv6 eigrp interfaces

4. no ipv6 eigrp AS NUMBER

The correct answer is: interface INTERFACE

The correct command to change the hello and hold timers for EIGRP on an interface is done within the context of that specific interface. This is executed using the command to enter interface configuration mode. When you enter interface configuration mode, you can then specify the EIGRP timers for that interface using the appropriate subcommands. For example, you would typically use `ipv6 eigrp <AS number> timers hello <time>` and `ipv6 eigrp <AS number> timers hold <time>` to set those timers. The other choices relate to different aspects of EIGRP configuration or information retrieval but do not address changing the timer settings specifically. For instance, some options refer to entering EIGRP configuration mode or displaying current EIGRP interface information, which are necessary steps for configuration but do not directly allow you to change the timers.