A retailer wants the 99.99 percent availability target Google documents for HA VPN between the campus and a VPC. What must the campus build to qualify on the Google Cloud side?
Select an answer to reveal the explanation.
Short Explanation
A spare socket with nothing plugged in does not make the circuit redundant. You need a tunnel on each of the two HA VPN interfaces, with BGP through Cloud Router, to chase the 99.99 percent target Google documents. One static Classic tunnel is a different, lower target.
Full Explanation
Google Cloud documents a 99.99 percent availability SLA for HA VPN when the topology connects the cloud gateway to the peer with a tunnel on each of the two HA VPN interfaces. Those tunnels use dynamic routing. Cloud Router runs BGP with the campus device. A Classic VPN tunnel with a static route uses a single external address and is the older gateway type. It is not the HA VPN topology that carries the 99.99 percent target. A single tunnel on only one HA VPN interface leaves the second interface unused, and Google states that this does not meet the 99.99 percent configuration. OSPF is not a Cloud VPN routing option. HA VPN does not form an OSPF adjacency, and a floating static does not replace the second tunnel. Exam caveat: the 99.99 percent figure is Google's documented target for that redundant topology, not a promise that one tunnel is enough if BGP is up. Operational check: the HA VPN gateway should show a tunnel on interface 0 and interface 1, and Cloud Router should show two BGP sessions to the campus.