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Zorluk: OrtaConfiguring Network Topology and VPC Infrastructure

An organization deploys Compute Engine instances across two regions, us-central1 and europe-west1, within a single custom-mode Virtual Private Cloud (VPC) network. A Cloud Router and Dedicated Interconnect attachment are configured in us-central1 to exchange BGP routes with an on-premises data center. Workloads in us-central1 can communicate with on-premises resources, but workloads in europe-west1 cannot reach on-premises IP ranges because dynamic routes learned by the Cloud Router are missing from the routing table in europe-west1. Which configuration change should the cloud architect implement to enable inter-region dynamic route propagation across the VPC?

  1. Change the dynamic routing mode of the VPC network from Regional to Global.Cevap
  2. B
    Establish a VPC Network Peering connection between the us-central1 subnet and the europe-west1 subnet and enable custom route export.
  3. C
    Replace the Dedicated Interconnect with an HA VPN gateway in europe-west1 because Cloud Routers cannot share Interconnect routes across regions.
  4. D
    Create a VPC Service Controls perimeter encompassing the europe-west1 subnet and configure an egress rule for the on-premises network.

Cevap

Change the dynamic routing mode of the VPC network from Regional to Global.
Google Cloud VPC networks support two dynamic routing modes: Regional and Global. When set to Regional dynamic routing, a Cloud Router only installs learned BGP routes into the subnets of its local region. Setting the VPC network dynamic routing mode to Global configures Cloud Routers to advertise and install dynamically learned routes across subnets in all regions within the VPC, allowing instances in europe-west1 to seamlessly route traffic through the us-central1 Cloud Interconnect.

Adım Adım Çözüm

1
Analyze the scope of route propagation in the VPC network.
Identify that the Cloud Router in us-central1 learns on-premises routes via BGP, but these routes are missing from the routing table in europe-west1.
By default, a VPC network configured with Regional dynamic routing only propagates learned dynamic routes to resources within the Cloud Router's local region.
2
Determine the appropriate VPC network routing setting.
Changing the dynamic routing mode to Global ensures that dynamically learned routes from any region's Cloud Router are available to all subnets across all regions in the VPC network.
Global dynamic routing allows cloud instances in europe-west1 to use the us-central1 Cloud Router and Interconnect path to reach on-premises networks.

Anahtar Kavram

VPC Dynamic Routing Modes (Regional vs. Global)
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Konular

Configuring Network Topology and VPC Infrastructure

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