Strange question I know. And I figure broadcasts are designed to only be sent over one subnet and defeats the purpose of seperating into multiple vlans.
We have a few KVM switches on our network (one IP address is 192.168.10.10/24). I am connecting to the KVM through a client on my computer (my computer is in a different subnet with the address 192.168.50.10/24). I have set up firewall rules so I can access the KVM just fine. Everything works as expected there.
The KVM client I run on my computer has the ability to display a list of all known KVMs on the network to allow for easy selection without having to type in the IP address. I can see all the KVMs if I connect my computer to the first subnet. But because I am on a different subnet the list of known KVMs isn't populated. Again, I can type in the IP address and connect. This would purely be a quality of life improvement.
I don't actually know how this works in the background, but I assume there is some broadcast being sent across the network. And it is not able to cross over the subnets. That would make sense. I have also contacted the supplier of the KVM client software to see if there is anything they can do on their side.
But I thought to ask here as well just in case there is any other way around this problem from the router side. Or I am being completely wrong about the broadcast being the cause of the issue.
