Our clients have recently purchased some equipment. This equipment will only work if the server / pc that is used to control it is on the same IP subnet. The complication is that the server / pc will be located at one site, but the equipment will be located at various different sites with different ip subnets.
My question is, is it possible and if so how can I have the same subnet present at multiple sites.
Our remote sites are connected via private circuits, we control layer 3 devices on our LAN but other layer 3 devices are controlled by 3rd party.
Thank you in advance.
You have identified an extremely poorly written piece of software.
I was referrering to the their "engineers" defending this choice as uneducated, not to you.
Personally I would either try get it working with NAT, or drop that software altogether.
Another technique you can use, in set the mask large enough to software that does idiotic subnet check is happy.
Router will still be able to forward by mean of proxy-arp.
There is no reason on earth by which application software can decide the network design, especially when it dictates against best practices universally adopted.