Network connectivity using the routes

Routes plays an important role in the networking world.

Why ?

To establish connectivity b/w the point A to point B 

Scenario,

VnetName : KaushikHubVnet
Region       : East US
Description : 

This Virtual Network is connected to the on-premise network by using a  site-to-site VPN that has BGP route propagation enabled. This network contains a subnet called SubnetA.


VnetName : KaushikSpokeVnet
Region       : East US
Description: 

This virtual network is connected to kaushikHubVnet by using the virtual network peering. This network contains a subnet named subnetB.

The virtual machines created in SubnetB can communicate with computers on the on-premises network.

how to deploy Azure Firewall to kaushikHubVnet ?

For this, we need the route table.

kaushikrt1 : This includes a user defined route that points to the private IP address of the Azure firewall as the next hop address

And we need to assign this route table(rt1) to the SubnetB.

kaushikrt2 : This disables BGP route propagation and defined the private IP address of the Azure Firewall as the default gateway.

And we need to assign this route table(rt2) to the GatewaySubnet.