Hey everyone! I'm trying to understand how the branch-to-branch feature in Azure Route Server works, especially regarding its reliance on dynamic routing. If I have a HUB VNet that contains a Virtual Network Gateway (VNG), an ExpressRoute Gateway (ER-GW), and a Route Server (RS), do both the VNG and ER-GW need to use BGP for this setup to function properly? Appreciate any insights!
1 Answer
Yes, both the VNG and ER-GW should be using BGP for the Route Server to function optimally. The Route Server's main role is to integrate Azure's SDN with a simpler version of BGP, making it understandable for your Network Virtual Appliances (NVAs). It can pick up prefix announcements from NVAs and inject these into the Azure network. Just keep in mind that the Route Server has a lower prefix volume limit compared to the Virtual Network Gateways, which can lead to stability issues if not managed properly.
Thanks for your input! So, just to clarify, you're saying that even though the VNG and ER-GW must use BGP, there can still be static routes as part of the setup?