Hi there
Please help me understand the relation/usage between/of the different route tables in a Hub vnet.
Let's say I have a Hub vnet with ExpressRoute GWs for on-prem connectivity, and VPN GWs for Vnet-Vnet VPN connections to other HUBs. Spokes are peered to the Hub.
The ER GW holds a route table.
The VPN GW. holds its route table.
And the GatewaySubnet holds a route table.
I can view the ER GW Private Peering route table.
I can see the BGP Peers/Routes in the VPN virtual gateway.
But in the hub I cannot really see the effective GatewaySubnet route table.
(I know I can by deploying a VM in a subnet in the hub)
When exactly is the GatewaySubnet route table consulted/used? In which flows?
Please elaborate on the GatewaySubnet vs. ER GW vs. VPN GW route tables and their exhange of routes or lack of.
Thanks in advance!
/Thomas
