Which two steps will accomplish this task?

Exhibit

You are asked to exchange routes between R1 and R4 as shown in the exhibit. These two routers use the same AS number.

Which two steps will accomplish this task? (Choose two.)
A . Configure the BGP group with the advertise-peer-as parameter on R1 and R4.
B . Configure the BGP group with the as-override parameter on R2 and R3
C . Configure the BGP group with the advertise-peer-as parameter on R2 and R3.
D . Configure the BGP group with the as-override parameter on R1 and R4

View Answer

Answer: A,B

Explanation:

The advertise-peer-as parameter allows a router to advertise its peer’s AS number as part of the AS path attribute when sending BGP updates to other peers. This parameter is useful when two routers in the same AS need to exchange routes through another AS, such as in the case of R1 and R4. By configuring this parameter on R1 and R4, they can advertise each other’s AS number to R2 and R3, respectively.

The as-override parameter allows a router to replace the AS number of its peer with its own AS number when receiving BGP updates from that peer. This parameter is useful when two routers in different ASes need to exchange routes through another AS that has the same AS number as one of them, such as in the case of R2 and R3. By configuring this parameter on R2 and R3, they can override the AS number of R1 and R4 with their own AS number when sending BGP updates to each other.