Enabling FQDN Gateways
Enabling Two AZ HA for FQDN Gateways
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On the Gateway page, highlight the gateway, and click Edit.
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At Gateway for High Availability Peering, select a subnet (a public subnet for AWS, GCP, and OCI) in the dropdown menu and click Create. A backup gateway will be created. This takes a few minutes.
For FQDN function, the primary gateway and backup gateway load balance the Internet bound traffic from different subnets based on a route table.
Enabling Three AZ HA for FQDN Gateways
Here are the steps to enable 3 AZ HA FQDN gateways:
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Launch an Aviatrix gateway in AZ1.
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Launch an Aviatrix gateway in AZ2.
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Launch an Aviatrix gateway in AZ3.
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Attach the same FQDN tag to each gateway launched in the steps above.
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Enable the FQDN tag.
Following the instructions above, Aviatrix Controller will try to load balance the route tables to point to the gateways with AZ affinity. When a gateway fails, the Controller will reprogram the VPC/VNet route table to redistribute the traffic to the remaining gateways.