350-401 Question 529
Single answerAn enterprise network is using EIGRP for internal routing. The network administrator needs to dynamically establish EIGRP neighbors without manually configuring each neighbor's IP address. Which configuration should the administrator use to achieve this?
- A
Enable EIGRP authentication using MD5 on all interfaces.
- B
Use the 'network' command in EIGRP configuration to include the desired interfaces.
- C
Manually configure each neighbor's IP address using the 'neighbor' command.
- D
Enable EIGRP on interfaces using the 'autonomous-system' command.
Show answer and explanation
Correct answer: B
Explanation
To dynamically discover and establish EIGRP neighbors, the 'network' command is used to include the interfaces that should participate in EIGRP. Once the interfaces are included, EIGRP automatically forms neighbor relationships with other EIGRP-enabled devices on the same network segment. Manual neighbor configuration is not required.
- A. Incorrect.
EIGRP authentication using MD5 enhances security but does not dynamically establish neighbors. It ensures that only authenticated neighbors can communicate.
- B. Correct.
The 'network' command in EIGRP identifies interfaces that should participate in EIGRP and allows the protocol to dynamically discover neighbors on those interfaces.
- C. Incorrect.
Manually configuring each neighbor using the 'neighbor' command is an option, but it is not dynamic and requires explicit configuration for each neighbor.
- D. Incorrect.
The 'autonomous-system' command enables EIGRP for a specific AS number but does not dynamically establish neighbors. It is a prerequisite for EIGRP configuration.