JNCIP-ENT: Juniper Networks Certified Professional – Enterprise Routing (2024) — Question 13
There are two BGP routes to 10.200.200.0/24 received from two external peers. Route 1 comes from a neighbor with a router ID of 10.10.100.1 and a peer IP address of 10.10.30.1, and route 2 comes from a neighbor with a router ID of 10.10.200.1 and a peer IP address of 10.10.50.1. Both routes have the same MED value, origin value, AS path length, and local preference number.
In this scenario, which statement is correct about the active route?
Answer options
- A. Route 1 will be active because of the peer IP address.
- B. Route 2 will be active because of the peer IP address.
- C. Route 1 will be active because of the router ID.
- D. Route 2 will be active because of the router ID.
Correct answer: C
Explanation
In BGP, if multiple routes have the same attributes, the router ID is the tiebreaker. Since Route 1 has a lower router ID of 10.10.100.1 compared to Route 2's 10.10.200.1, Route 1 is selected as the active route. The other options incorrectly attribute the decision to peer IP addresses or suggest the wrong router ID.