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Hyper-V How to Privately Route

Posted on 2010-11-26
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Last Modified: 2012-05-10
I have a hadfull of DC's I have created images of to put in a virtual environment using Hyper-V however, each of these Physical DC's were in different sites, and were on different subnets, but were routed.

I would like to replicate this in a virtual environment keeping their IP's the same, but somehow creating a virtual router.  How would I go about doing this.  I am working with 3 DC's each in a different Site, and I would like to keep the virtual network they are all using set to "Private" in Hyper-V.  There is no need for them to communicate with the host OS as this is a lab setup for testing.

Site 1 DC-01
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IP:     10.0.2.22 / 24
DG:  10.0.2.1


Site 2 DC-02
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IP:     10.4.0.10 / 16
DG:  10.4.0.1


Site 3 DC-03
---------------
IP:     10.2.0.10 / 16
DG:  10.2.0.1

Any help you can give would be great!  I have read a little about setting up a RAS but havent done it before.  Though again I'd like to do this all "Virtually" if possible.
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Question by:NoodlesWIU
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kevinhsieh earned 2000 total points
ID: 34219212
You are going to have to put all of them on the same Hyper-V host. Create 3 private virtual networks, Site1, Site2, and Site3. Attach each VM guest to the correct network. Create a 4th Windows Server VM, and configure it with 3 NICS, one connected to each network. Configure its interfaces to be 10.0.2.1, 10.4.0.1, and 10.2.0.1. Install RRAS and configure it to do LAN routing, and you should be in business.
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by:NoodlesWIU
ID: 34219453
Awesome, I was planning all on the same host, and thought this would be my setup.  Though I have one question. Theoretically could I just put one NIC on the RRAS VM and assign it multiple IP's on different subnets to be in the same networks as each of the sites?  Having 3 NIC's is just as easy, but im curious from a learning standpoint if the same could be accomplished with one NIC.  Thanks for your help.
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Expert Comment

by:kevinhsieh
ID: 34219500
The single NIC should work, assuming that RRAs doesn't complain. That's not quite as good of a model because the 3 DCs would be able to see Ethernet broadcasts from each other, which they would not be able to do on your real life WAN. If you were to add a client that used DHCP and each DC had DHCP installed, you wouldn't be able to controll which DHCP server handed out the IP address.
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