Same subnet over VPN
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 So I'm contemplating a redundant server between 2 buildings and looking for some info beforehand. 
 Here's what I need to do:
 I'll setup a Xenserver in each building and use everRun for VM redundancy.
 To do this I need to have the remote site use an IP from the local subnet. I have an OpenVPN between building already but it's a tun VPN so no layer2.My questions are: 
 Does anyone know how to have the remote site use a local subnet?
 I'm assuming a tap VPN might do this.
 Any other way?If a tap VPN works, how would that play with the existing tun VPN between these sites? 
 My thinking is keep the existing VPN and add a tap just for the server.Any thoughts or other ways to do this? 
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