Site-to-site VPN high availability and multi-site configurations
Site-to-site VPN allows you to set up high availability and multi-site deployments by letting you deploy VPN gateways across multiple Availability Zones within a Region, all attached to the same Private Network.
Adding redundancy with a second VPN gateway eliminates single points of failure for critical infrastructure. You can then connect several distinct infrastructures to set up large-scale multi-site deployments.
Single site configuration without redundancy
In this configuration, a VPN gateway in a single Availability Zone connects to a customer gateway in a single remote infrastructure.

Single site configuration with redundancy on Scaleway side
The schema below represents a Site-to-Site VPN configuration between two VPN gateways in two AZs, attached to a single Private Network in a single VPC on the Scaleway side, and connected to a customer gateway in a single remote infrastructure. This setup offers high availability on the Scaleway side.

Single site configuration with crossed redundancy on both Scaleway and customer sides
The schema below represents a Site-to-Site VPN configuration between two VPN gateways in two AZs, attached to a single Private Network in a single VPC on the Scaleway side, each connected to two customer gateways in a single remote infrastructure. This setup offers high availability on both the Scaleway and customer sides, with crossed redundancy for the connections.

Multi-site configuration with crossed redundancy on both sides
The schema below represents a Site-to-Site VPN configuration between two VPN gateways in two AZs, attached to a single Private Network in a single VPC on the Scaleway side, each connected to four customer gateways across two remote infrastructures. This setup offers high availability on the Scaleway side, and each site on the customer side, with crossed redundancy for the connections.
