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Answer: Configure Bidirectional Forwarding Detection (BFD) on the on-premises router.
To reduce the failover time in an AWS Direct Connect setup, the most effective solution among the provided options is to configure Bidirectional Forwarding Detection (BFD) on the on-premises router. BFD is a protocol designed to detect faults between two forwarding engines connected by a link, and it can provide faster failure detection times than BGP timers alone. BFD can detect failures in milliseconds, significantly reducing the failover time compared to the default BGP timers. Decreasing the BGP hello or hold-down timers (options A and D) can also reduce failover times, but not as significantly as BFD. Adding a VPN connection with fast failover (option B) introduces complexity and may not directly address the failover time issue in the context of AWS Direct Connect. Therefore, the best solution is to configure BFD on the on-premises router.
Author: LeetQuiz Editorial Team
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Which solution will minimize the failover duration when a network engineer observes a 90-second interruption during a failover event after configuring a second AWS Direct Connect connection and running a test in the AWS Direct Connect Resiliency Toolkit?
A
Decrease the BGP hello timer to 5 seconds.
B
Add a VPN connection to the connectivity solution. Implement fast failover.
C
Configure Bidirectional Forwarding Detection (BFD) on the on-premises router.
D
Decrease the BGP hold-down timer to 5 seconds.
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