Hybrid connectivity options
Throughout this chapter, we have made references to hybrid connectivity. The term hybrid connectivity means that you can join your Google Cloud network to your on-premises network and a third-party cloud provider using multiple connectivity options. We will look at two options: Cloud VPN (IPSec) and Cloud Interconnect.
Before we look at the different connectivity options, it’s important to understand what Cloud Router is, as it is a key component when creating a Google Cloud-based VPN. Cloud Router is a managed service and a regional resource. It is responsible for exchanging routes between your VPC and your on-premises network via BGP. Dynamic routing options include both regional and global. With regional routing, Cloud Router shares routes only for subnets in the region where Cloud Router is provisioned. With global routing, it shares routes for all subnets in the VPC network.
Figure 7.29 – Cloud Router
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