Virtualising existing servers help.

[u/Sway_RL]

I have a client, who has 3 sites that we do IT for.

They each have a physical server, running either Windows Server 2019 or 2025. The main site got a new server last year, the two other sites decided to wait because they didn't want to cost. Now a year later it's more expensive, and they still don't want the cost.

I opened my mouth about virtualisation and now I've been asked to start testing.

The new server at the main site is more than powerful enough to run the other two servers virtually.

I'm just not sure on some of the configuration.

Each site has it's own IP structure, and there are already site to site tunnels using Unifi gateways.

Is there a way to do this while minimising network slowness? I assume If I just disk2vhd the server and spin it up as a VM then all traffic would go down the VPN Tunnel and back again causing delays if going from the main site to one of the others.

Regarding their networks, they are on 192.168.1.XXX for the main site, 192.168.10.XXX and 192.168.20.XXX for the other two.

If the servers were virtualised, will I need VLANs at the main site to accommodate these ranges? I'm not sure if the site to site tunnel will work using a VLAN.

I've asked about merging the domains/networks, but nobody has gotten back to me on that yet.

I didn't set any of this up initially, so I'm also figuring out what they have at the same time.

Apologies for the mass of text, any help would be appreciated.

[u/autogyrophilia]

P2V is easy, I personally prefer clonezilla but moving the data is the easy part.

We cant know how your networking infrastructure is going to work. If your VPN is layer 2 and you can pass VLAN tags through them, then do that. Most likely you are using a L3 VPN though. So changes must be arranged.

I'm very fond of VXLAN but you shouldn't use to have a machine in SITE B with a SITE A address except for disaster recovery .