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Difficulty: MediumDesigning Network Architecture and Hybrid Connectivity

A financial services company is designing a hybrid network connection between its main on-premises data center and a Google Cloud Virtual Private Cloud (VPC) host network. The architecture must support a constant minimum throughput of 15 Gbps for database synchronization, guarantee enterprise SLA-backed availability, and dynamically exchange routes between on-premises routers and Google Cloud without relying on static routes. Which hybrid network architecture should the cloud architect recommend?

  1. Provision two 10 Gbps Dedicated Interconnect connections across separate metropolitan edge availability domains, and configure Cloud Router to manage dynamic BGP sessions.Answer
  2. B
    Configure an HA VPN gateway with multiple active IPsec tunnels over the public internet, using Cloud Router for dynamic BGP route propagation.
  3. C
    Establish a VPC Network Peering connection directly between the on-premises router and a central hub VPC network that forwards traffic to spoke VPCs.
  4. D
    Deploy a single 10 Gbps Partner Interconnect connection configured with static route entries managed through Cloud DNS policy rules.

Answer

The recommended solution is to provision two 10 Gbps Dedicated Interconnect connections across separate metropolitan edge availability domains and configure Cloud Router to manage dynamic BGP sessions.
Provisioning two 10 Gbps Dedicated Interconnect connections satisfies the 15 Gbps bandwidth threshold while ensuring high availability across distinct edge locations. Integrating Cloud Router enables dynamic BGP route exchanges between Google Cloud VPC and the on-premises network.

Step-by-Step Solution

1
Analyze bandwidth and reliability constraints
Requirements call for 15 Gbps sustained throughput and SLA-backed high availability.
Cloud VPN is capped at 3 Gbps per tunnel over the public internet and cannot guarantee 15 Gbps dedicated throughput. Dedicated Interconnect provides 10 Gbps or 100 Gbps physical circuits capable of meeting high bandwidth demands.
2
Evaluate routing and connectivity mechanisms
Dynamic routing requires Cloud Router with Border Gateway Protocol (BGP).
Cloud Router integrates with Dedicated Interconnect to dynamically advertise and learn network prefixes via BGP without manual static route maintenance.
3
Select redundant topology for high availability SLA
Deploying two Dedicated Interconnect circuits across separate edge availability domains fulfills production SLA requirements.
Redundant interconnect attachments across distinct edge facilities protect against single-point-of-failure outages.

Key Concept

Selecting high-throughput hybrid connectivity with Dedicated Interconnect and dynamic BGP routing via Cloud Router
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Topics

Designing Network Architecture and Hybrid Connectivity