This page describes the high-level Network Connectivity Center topology and two possible topologies for Router appliance.
Network Connectivity Center topology
Network Connectivity Center supports the following types of Network Connectivity Center resources attached to spokes. It also supports data transfer between on-premises branch offices and data center facilities.
Router appliance spoke topologies
The following sections show site-to-site and single-site topologies for Router appliance spokes.
You can use Router appliance to enable data transfer between environments outside of Google Cloud—for example, between your on-premises branch offices or stores.
The following example topology shows two on-premises sites that use Router appliance spokes to communicate with each other by using a Network Connectivity Center hub.
Customer network Aand
Customer network Bare each connected through customer premises equipment (CPE) to a router appliance instance. CPEs typically use a connectivity mechanism, such as an SD-WAN overlay tunnel or an IPsec VPN tunnel, to establish connectivity with the router appliance instance.
Each router appliance instance is located in the Google Cloud region closest to its associated customer network. Both router appliance instances are in a single VPC network; however, because the router appliance instances sit in different regions, the VPC network has its dynamic routing mode set to
You can create router appliance instances only in locations where Network Connectivity Center is supported. For more information, see the Network Connectivity Center locations page.
Both router appliance instances are attached as spokes to the Network Connectivity Center hub.
Each router appliance instance establishes BGP peering with the Cloud Router in the router appliance instance's respective region. The Cloud Router receives and advertises route prefixes from the on-premises location.
The Cloud Routers in both regions dynamically exchange all received routes with each other. This configuration provides end-to-end dynamic route exchange and data plane connectivity between
Customer network Aand
Customer network B.
Single-site topology using load balanced router appliance instances
The following topology shows load balanced router appliance instances to a single on-premises site.
For a detailed description of this topology, BGP route exchange, and step-by-step instructions about how to configure it, see Creating router appliance instances.
- To view monitoring and logging information, see Viewing logs and metrics.
- To find solutions for Network Connectivity Center and Router appliance issues, see Troubleshooting.
- To view a list of partners whose solutions are integrated with Network Connectivity Center, see Network Connectivity Center partners.