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When you add new virtual machines in Azure you can add it directly into a virtual network, but that is the same drop box for the affinity group. Is this then implying that because I am adding in all these VM's into the same virtual network that its going to treat them like they are in the same affinity group?

Thanks in advance for any info. I cant seem to find a straight answer on the windows azure documentation website.


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up vote 3 down vote accepted

You are correct.

A virtual network is just a very specific Affinity Group.

I really like this definition of an Affinity Group. You can see as you read it that it is exactly what a local network (or virtual in our case) is supposed to do.

Narahari Dogiparthi's blog states:


Microsoft's Azure documentation suggests that using both together can give you a WAN style network. Multiple VLAN's connected through one Affinity Group. So you can see that its the same thing, but just another abstraction layer.

Mark Russinovich is also a great guy to follow in this area as well. Check out this session where he talks about how Microsoft structures its virtual networks in Azure. (at ~30:00)

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Thanks for the detailed answer. I will check out thoes videos right now. Last question, can two virtual networks talk to eachother? A client want's to setup a backend network and front end network. Is it possble? and to be able to control a firewall between them (azure endpoints)? –  Rob Sep 18 '13 at 14:05
I've not tried it, but it should be possible. let me know if you succeed. Bummer they put this question on hold.. i thought it was a good one. Can you still upvote it? –  paqogomez Sep 18 '13 at 16:01
The only way you can access on virtual network from another on Windows Azure is through the internet –  Yossi Dahan Dec 9 '13 at 22:33
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