If you try searching for the network bandwidth speed of Azure VMs, you will probably spend a while trying to find even the slightest bit of information, not even the official documentation has any details on the topic. So I decided to publish my own findings and any other source of information I have found.

The tests were performed on a Virtual Machine located in the Europe-West region using Ookla Speedtest.net using their KPN Amsterdam-Netherlands test point.

Size	Ping	Download Speed	Upload Speed
A0 - 1 Shared Core 768MB Memory	1ms	226.07Mbps	5.13Mbps
A1 - 1 Core 1.75GB Memory	1ms	349.53Mbps	95.69Mbps
A2 - 2 Core 3.5GB Memory	1ms	435.75Mbps	183.22Mbps
A3 - 4 core  7GB memory	1ms	481.99Mbps	360.45Mbps
A4 - 8 core  14GB memory	1ms	488.74Mbps	677.58Mbps

Additional external references:

• http://stackoverflow.com/questions/17303044/windows-azure-virtual-machine-is-slow-to-access-network-when-scaling
• http://blogs.msdn.com/b/thecolorofazure/archive/2014/05/13/azure-implementation-guidelines.aspx
• http://blogs.breeze.net/mickb/2014/05/01/AzureOutboundThrottlingOfVMs.aspx
• https://msdn.microsoft.com/library/azure/dn197896.aspx

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