CCIE Service Provider (legacy) — Question 20
On the BGP Best Path Selection, when two external paths from different EBGP neighbors are received, the oldest path received can be the tie break to select the best path. Which Cisco IOS command ignores this decision criteria and checks the next decision criteria?
Answer options
- A. bgp best path med missing-as-worst
- B. bgp best path compare-routerid
- C. bgp best path cost-community ignore
- D. bgp best path as-path ignore
Correct answer: B
Explanation
The correct answer is B because the command 'bgp best path compare-routerid' specifically instructs the router to bypass the oldest path tie-breaker and instead utilize the router ID for comparison. The other options do not affect the tiebreaker based on path age; they modify different aspects of the BGP path selection process.