When setting up a server for sites I would just have the server with multiple IPs on the one NIC. I don't know if this is the best solution as we had a single VLAN with multiple subnets.
I only had one major issue with the setup but that was because someone moved a ethernet cable to a random switch that caused a weird circle configuration. The network was unhappy and I ripped out a couple switches and made them a single VLAN instead of two mixed switches (multiple VLANs). I wasn't happy that day.
This follows into the other question I have, on how to set up an engineers work station to connect to all these separate machines? Do I need multiple network ports configured? or can it be done with one network port and some clever set up?
https://www.practicalnetworking.net/stand-alone/routing-between-vlans/
I'm unsure how big your network is but the vlan direction is the "safer" bet but takes a bit of work to get it setup.
If you have a small network might consider a single vlan and have multiple sub-nets.
...(IT is our friends)...
Made me laugh, I have a couple IT guys I would like to strangle.
On my Allen Bradley controllers I can have multiple Ethernet cards installed so I can have separate networks. One card will be for the machine network and the other card will be for the plant network. I have never messed around with Siemens controls before, but I bet you can put more than one Ethernet card in the rack.
https://www.practicalnetworking.net/stand-alone/routing-between-vlans/
I'm unsure how big your network is but the vlan direction is the "safer" bet but takes a bit of work to get it setup.
If you have a small network might consider a single vlan and have multiple sub-nets.
I have never messed around with Siemens controls before, but I bet you can put more than one Ethernet card in the rack.
Made me laugh, I have a couple IT guys I would like to strangle.
we are a Siemens factory, so I may need to work with the equivalent Siemens team.