Question

A retail company operates 40 branch offices, each already connected to Google Cloud via its own HA VPN tunnel terminating on a separate Cloud Router in a single VPC. The branches currently cannot exchange traffic with one another; all inter-branch traffic is backhauled through an aging on-premises data center. Leadership wants branches to communicate directly with each other over Google's backbone, avoiding the data center hop, while minimizing operational overhead and avoiding a full-mesh of VPN tunnels between branches. Which Google Cloud design should the network engineer implement?

Accepted Answer

Deploy Network Connectivity Center with a hub, and attach each branch's HA VPN as a spoke to enable site-to-site data transfer across Google's backbone.

Answer

Create VPC Network Peering between each branch's on-premises router and the central VPC to allow transitive routing between branches.

Answer

Enable custom route advertisement on the single Cloud Router so that each branch's routes are automatically re-advertised to every other branch tunnel.

Answer

Migrate all branches to a Dedicated Interconnect and use a single VLAN attachment to provide any-to-any connectivity between sites.