VNet Route Tables for your Azure Subscription

For egress deployments, you may need to create a user-defined routing (UDR) table to manually direct the spoke network where to go. By default, both Azure and has the ability to automatically identify the routing values because of a private information exchange between the peers. This may be ideal for ingress gateways but not for egress gateways.

To override these values or the subnet routing table as a whole for your egress deployment, you must reassign the values in the Azure portal. See Azure documentation for more information.

What Kind of Routing Table Is My Gateway Using?

To determine if your routing table is based on a peer device's VNet or not, view the gateway assigned to your subscription in Infrastructure > Gateways > Gateways and click View Details. From this window navigate to the Troubleshooting > Datapath Subnet tab. If there is no routing table visible, then your subscription is utilizing the default routing table pulled from your peer device.