Skip to main content

Define multiple networks (NIC) on Azure VMs

NIC comes from Network Interface Controller. What is connection between NIC and Microsoft Azure?
Starting from now we have the possibility to define multiple virtual network interfaces for each VM that is hosted on Azure. In on-premises this features is used to connect to multiple networks and provide mechanism to isolate different tiers of our system.
This can be used with success, in combination with a VPN connection to connect to multiple on-premises networks or Azure Virtual Networks. In this way we can establish a Cross Premises Connectivity.
In this moment the configuration can be made using PowerShell scripts and commands. An important pre requirement for NIC is to have Azure Virtual Network already configured on that VM.
A NIC can be configured only on VM. You cannot make this configuration on a web role or web sites. In this moment this feature is available only for VM. There is also a limit of number of NICs that you can define on each VM. The number is direct connected to the size of the machine. For example for an A6 you can define 2 NICs, but for an A7 you can define 4 NICS.
Because NICs are a new feature on Azure, there are some limitation in this moment. I expect that in the near future this limitation will be relaxed or even disappear. Below you can find a part of this limitations:
You cannot have multiple NICs on the same subnet
IP and MAC of each NIC will remain the same after a restart. The same thing is also for the network orders even if the order or networks cannot be controlled.
You cannot add/remove NICs once the VM is connected. This is one of the limitations that I hope that will be removed in near future.

Comments

Popular posts from this blog

How to check in AngularJS if a service was register or not

There are cases when you need to check in a service or a controller was register in AngularJS.
For example a valid use case is when you have the same implementation running on multiple application. In this case, you may want to intercept the HTTP provider and add a custom step there. This step don’t needs to run on all the application, only in the one where the service exist and register.
A solution for this case would be to have a flag in the configuration that specify this. In the core you would have an IF that would check the value of this flag.
Another solution is to check if a specific service was register in AngularJS or not. If the service was register that you would execute your own logic.
To check if a service was register or not in AngularJS container you need to call the ‘has’ method of ‘inhector’. It will return TRUE if the service was register.
if ($injector.has('httpInterceptorService')) { $httpProvider.interceptors.push('httpInterceptorService&#…

ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded

Today blog post will be started with the following error when running DB tests on the CI machine:
threw exception: System.InvalidOperationException: The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer' registered in the application config file for the ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information. at System.Data.Entity.Infrastructure.DependencyResolution.ProviderServicesFactory.GetInstance(String providerTypeName, String providerInvariantName) This error happened only on the Continuous Integration machine. On the devs machines, everything has fine. The classic problem – on my machine it’s working. The CI has the following configuration:

TeamCity.NET 4.51EF 6.0.2VS2013
It seems that there …

[Post-Event] Codecamp Conference Cluj-Napoca - Nov 19, 2016

Last day I was invited to another Codecamp Conference, that took place in Cluj-Napoca. Like other Codecamp Conferences, the event was very big, with more than 1.000 participants and 70 sessions. There were 10 tracks in parallel, so it was pretty hard to decide at  what session you want to join.
It was great to join this conference and I hope that you discovered something new during the conference.
At this event I talked about Azure IoT Hub and how we can use it to connect devices from the field. I had a lot of demos using Raspberry PI 3 and Simplelink SensorTag. Most of the samples were written in C++ and Node.JS and people were impressed that even if we are using Microsoft technologies, we are not limited to C# and .NET. World and Microsoft are changing so fast. Just looking and Azure IoT Hub and new features that were launched and I'm pressed (Jobs, Methods, Device Twin).
On backend my demos covered Stream Analytics, Event Hub, Azure Object Storage and DocumentDB.

Title:
What abo…