Google Professional Cloud Network Engineer Question 684
Select 3Google Cloud PlatformYou are configuring a VPN connection between your on-premises data center and Google Cloud using Cloud Router and Cloud VPN. To ensure rapid failure detection and switchover in case of a connectivity issue, you decide to enable Bidirectional Forwarding Detection (BFD). Which of the following steps are required to properly configure BFD for your Cloud Router?
- A
Enable BFD on both the Cloud Router and the on-premises router.
- B
Set the BFD session to use asynchronous mode on the Cloud Router.
- C
Specify the BFD session parameters, such as minimum transmit and receive intervals, on the Cloud Router.
- D
Configure the on-premises network to use static routes instead of dynamic routing.
- E
Ensure that the Cloud Router and the on-premises router support the same BFD mode (asynchronous or demand mode).
Show answer and explanation
Correct answers: A, C, E
Explanation
Bidirectional Forwarding Detection (BFD) is used to detect faults in the forwarding path between two routers. To configure BFD for a VPN connection using Cloud Router, you must enable BFD on both ends (Cloud Router and on-premises router), configure session parameters like transmit and receive intervals, and ensure both routers support the same BFD mode. BFD sessions on Cloud Router operate in asynchronous mode by default, and static routes are not required for BFD since it is typically used in conjunction with dynamic routing protocols like BGP.
- A. Correct.
Correct. BFD must be enabled on both ends of the connection (Cloud Router and the on-premises router) for it to function properly.
- B. Incorrect.
Incorrect. BFD sessions on Cloud Router always operate in asynchronous mode by default, and there is no need to explicitly configure this.
- C. Correct.
Correct. You need to configure the BFD session parameters on the Cloud Router, such as minimum transmit and receive intervals, to ensure proper operation.
- D. Incorrect.
Incorrect. BFD is compatible with dynamic routing protocols like BGP, and static routes are not a requirement for enabling BFD.
- E. Correct.
Correct. Both the Cloud Router and the on-premises router must support and use the same BFD mode (asynchronous or demand mode) for the session to work.