300-410 Question 133
Select 3A network engineer is configuring a BGP neighbor to exchange routes for both IPv4 and IPv6 address families. Which steps must the engineer take to ensure proper configuration of address families on the BGP neighbor?
- A
Enable the desired address families under the BGP configuration using the 'address-family' command.
- B
Configure a separate neighbor statement for IPv4 and IPv6 address families.
- C
Activate the neighbor for each address family using the 'neighbor [ip-address] activate' command.
- D
Use the 'bgp router-id' command to set the router ID for IPv6 address family.
- E
Ensure that the 'neighbor [ip-address] remote-as' command is applied globally for both IPv4 and IPv6.
Show answer and explanation
Correct answers: A, C, E
Explanation
To properly configure BGP for both IPv4 and IPv6 address families, the engineer must enable address families using the 'address-family' command, activate the neighbor for each address family using the 'neighbor activate' command, and configure the 'neighbor remote-as' command globally. These steps ensure that BGP knows which protocols to use for route exchange and that the neighbors are correctly activated for each address family.
- A. Correct.
Correct: The 'address-family' command is necessary to specify the address families (IPv4 or IPv6) that BGP will use for route exchange.
- B. Incorrect.
Incorrect: Separate neighbor statements are not required; a single neighbor statement can be used for both IPv4 and IPv6 address families.
- C. Correct.
Correct: The 'neighbor activate' command must be used to activate the neighbor for each specific address family.
- D. Incorrect.
Incorrect: The 'bgp router-id' command is used to set the BGP router ID but is not specific to the IPv6 address family. It applies to the entire BGP process.
- E. Correct.
Correct: The 'neighbor remote-as' command must be applied globally, defining the remote AS for the neighbor, and this setting is inherited across all address families.