Designing and Implementing Microsoft Azure Networking Solutions — Question 94

You have an on-premises datacenter named DC1 that contains two routers.

You have an Azure subscription. The subscription contains a virtual network named VNet1 and a zone-redundant ExpressRoute virtual network gateway named GW1 that uses the ErGw3Az SKU. GW1 is attached to VNet1

DC1 is connected to VNet1 by using an ExpressRoute Standard circuit named Circuit1. The DC1 routers are configured as endpoints for Circuit1. Circuit1 traffic traverses two physical links.

During a link outage, the connection takes three minutes to fail over.

You need to ensure that failovers between the links take less than one second.

What should you do?

Answer options

• A. For Circuit1, select FastPath.
• B. On the routers, configure Bidirectional Forwarding Detection (BFD).
• C. For GW1, change SKU to UltraPerformance.
• D. For GW1, set Active-active mode to Enabled.

Correct answer: B

Explanation

The correct answer is B because configuring Bidirectional Forwarding Detection (BFD) on the routers allows for rapid detection of link failures, significantly reducing failover time. Options A and C do not address the failover time directly, while option D relates to gateway configuration but does not enhance link failover speed to less than one second.