Designing and implementing cross-network connectivity over ExpressRoute
By default, ExpressRoute connections route network traffic only between connected remote networks and Azure VNets. For example, an organization has two branch offices connected to Azure networks (as shown in Figure 6.26), as follows:
- A remote network in London that connects to an Azure network in “UK South” via an ExpressRoute circuit in London
- A remote network in New York that connects to an Azure network in “East US” via an ExpressRoute circuit in New York
The result of this connectivity is that the 10.30.0.0/16 network can communicate with the 10.10.0.0/16 network, and the 10.40.0.0/16 network can communicate with the 10.20.0.0/16 network. However, no other cross-network communication will be possible:
Figure 6.26 – Single-region ExpressRoute connection scenario
Enhancing cross-network connectivity using VNet peering
To enhance...
