High Availability connection site to site

Occasional Visitor

Hi All,

I would like extend my infrastructure in Azure China but I also would like maintaining back-end and other services from my actual Azure cloud (Europe Frankfurt).

As you can understand to reach my goal I need an High Availability connection between the 2 sites.

Is it possible use Express Route to send/receive data from/to my two sites? There are other options in order to avoid the restrictions and the low availability caused by China Firewall?


Thanks in advance for your suggestion.

1 Reply

From MS Docs: You can achieve high availability by connecting ExpressRoute circuits in different peering locations (e.g. Singapore, Singapore2) to your virtual network. If one ExpressRoute circuit goes down, connectivity will fail over to another ExpressRoute circuit. By default, traffic leaving your virtual network is routed based on Equal Cost Multi-path Routing (ECMP). You can use Connection Weight to prefer one circuit to another.


Virtual machines deployed in virtual networks connected to the same ExpressRoute circuit can communicate with each other. Also, with ExpressRoute, you can enable Virtual Network to Virtual Network communication by linking them to an ExpressRoute circuit. - Please check Suboptimal routing between virtual networks https://docs.microsoft.com/en-us/azure/expressroute/expressroute-optimize-routing#suboptimal-routing...