JNCIP-SP: Juniper Networks Certified Professional – Service Provider (2023) — Question 21

Your network is receiving the 203.0.113.0/24 network using EBGP from AS 64500 and AS 64501. Both of these advertisements have identical local-preference values, AS-path lengths, and BGP origin codes. You want to influence the way your AS sends traffic to the 203.0.113.0/24 network.
In this scenario, which attribute would you consider next when selecting the best path?

Answer options

• A. router ID
• B. MED value
• C. peer IP address
• D. IGP metric

Correct answer: A

Explanation

The correct answer is A, router ID, because when all other attributes are identical, the router ID becomes the next deciding factor in BGP path selection. The other options such as MED value, peer IP address, and IGP metric do not influence the decision in this scenario as they are either not applicable or would not change the path selection in the presence of identical attributes.