Google Professional Cloud Network Engineer Question 680
Select 3Google Cloud PlatformYour organization has set up a hybrid cloud architecture with Google Cloud and an on-premises data center. You are using a Cloud Router with a BGP session to establish connectivity between the two environments. To ensure faster detection of link failures and minimize downtime, you decide to configure Bidirectional Forwarding Detection (BFD). Which of the following steps are necessary to properly configure BFD for the BGP session on the Cloud Router?
- A
Enable BFD on both the Cloud Router and the on-premises router.
- B
Configure a BFD session interval and detection multiplier on the Cloud Router.
- C
Enable BFD only on the Cloud Router, as Google Cloud automatically handles the on-premises configuration.
- D
Ensure that the Cloud Router and the on-premises router support the same BFD version.
- E
Verify that the on-premises router’s BGP peer IP matches the Cloud Router’s interface IP.
Show answer and explanation
Correct answers: A, B, D
Explanation
Bidirectional Forwarding Detection (BFD) is an important mechanism for quickly detecting link failures in hybrid environments. To properly configure BFD for a BGP session with a Cloud Router, you need to enable BFD on both the Cloud Router and the on-premises router, configure appropriate BFD session parameters, and verify compatibility between the devices. These steps ensure that the BFD session is established and operates as intended, minimizing downtime in case of link failures.
- A. Correct.
Correct: BFD must be explicitly enabled on both the Cloud Router and the on-premises router for it to function properly. This ensures that both routers can send and receive BFD control packets.
- B. Correct.
Correct: You need to configure the session interval and detection multiplier on the Cloud Router to define how quickly link failures will be detected. These settings determine the frequency of BFD packet exchange and the number of missed packets before declaring a failure.
- C. Incorrect.
Incorrect: BFD must be enabled on both the Cloud Router and the on-premises router. Google Cloud does not handle on-premises router configurations automatically.
- D. Correct.
Correct: Both the Cloud Router and the on-premises router must support the same version of the BFD protocol to ensure compatibility and proper communication.
- E. Incorrect.
Incorrect: While matching BGP peer IPs is essential for establishing a BGP session, it is not directly related to configuring BFD.