The foundations of any Azure project is to plan correctly the networking stuff. But, man, believe me when I say that most companies are not planning or giving it the appropriate importance. I know, it is very easy to follow the trends, get excited and say: Hey guys! Let's create a subscription and deploy the next project on Azure. Of course, that's something super cool to bring to the next meeting with the CEO and it will be a fancy desk full of clouds. But a project in the cloud doesn't work like that.
I recently worked for a client who wanted to implement a System Center solution for its servers. We had the scope and project plan defined and we were about to start the project. We had a kick-off meeting and at some point the next question came to my team: Could it be possible to deploy this infrastructure on Azure? Yes it can be deployed, we answered. That's absolutely possible since all roles are supported to work in Azure.
The client's team got really excited with the idea of deploying this project in the cloud, so they decided to go ahead in this same meeting. As the client wasn't aware of the fact that they weren't ready for the cloud, about the implications of this type of project, we had to explain to them about the foundation, the first consideration before everything: PLAN YOUR NETWORK
They didn't realize some of the questions which we had to bring to the table:
- Are you a big company? A multinational company with branch offices in USA, Europe and Asia?
- How many Virtual Networks do you need? One per region?
- Do you need to reach out from the cloud to all servers on-premises?
- What's the amount of traffic expected? Do you need a Site-to-Site VPN? Do you need an Express route connection?
- What's the CIDR for the networks? Will the virtual network overlap with on-premises?
- Do you have Gateway devices supported by Azure?
And as we were feared, they didn't know. So, eventually we went ahead to the cloud, but we had to back up and put the project off for a couple of months. Till the NETWORK PLAN was made and ready to deploy in the cloud.
Perhaps another partner would have push through from the beginning without considering the network stuff, simply to avoid those months of waste time and money. But eventually, the problems would have surfaced.
Two takeaways from this post: Plan your network really well and find a good partner!
In the next post, I will go through some Virtual Network configurations in the cloud.
Enjoy! Happy holidays!
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