300-440 Question 131
Select 3A network engineer is configuring BGP on a dual-stack router to support both IPv4 and IPv6 address families. The engineer wants to ensure proper route advertisement and exchange for both address families. Which BGP configuration steps are required to achieve this?
- A
Configure separate address-family IPv4 and IPv6 under the BGP routing process.
- B
Enable IPv4 and IPv6 unicast routing globally on the router.
- C
Use the 'network' command with IPv4 and IPv6 prefixes in the global BGP configuration.
- D
Activate the IPv4 and IPv6 neighbors within their respective address-family configuration.
- E
Use a single address-family configuration to support both IPv4 and IPv6.
Show answer and explanation
Correct answers: A, B, D
Explanation
To configure BGP for both IPv4 and IPv6 address families, the network engineer must enable unicast routing globally, configure separate address-family sections for IPv4 and IPv6, and activate neighbors within their respective address-family configurations. Each address family operates independently, which ensures proper route advertisement and exchange for both protocols.
- A. Correct.
Correct. BGP requires separate address-family configurations for IPv4 and IPv6 to handle routes for each protocol independently.
- B. Correct.
Correct. Enabling unicast routing globally on the router is a prerequisite for supporting IPv4 and IPv6 routing.
- C. Incorrect.
Incorrect. The 'network' command is used to advertise specific prefixes into BGP, but it alone is not sufficient to enable IPv4 and IPv6 address families.
- D. Correct.
Correct. Neighbors must be activated under their respective address-family configuration to exchange routes for IPv4 and IPv6.
- E. Incorrect.
Incorrect. IPv4 and IPv6 address families require separate configurations in BGP, as they are managed independently.