Setting up the Netonix as a mid-span does use the VLAN configuration to achieve this but it does NOT require your network to use VLANs.
For instance say you want to make a midspan injector with a Netonix Switch.
In this example I am using a WS-8-250-AC
I create a VLAN to define the mid-span.
Now if you are only going to pass Untagged packets the VLAN ID is not important and in this case I called it 999 but since it will only pass Untagged packets this ID is never really used and is just there because an ID is required, you could call it any number 1 - 4095
I simply selected the 2 ports I want to be used for the mid-span and in this case I use Port 1 and Port 8.
So I simply exclude ports 1 & 8 from all other VLAN definitions by putting an E on ports 1 & 8 in their definition.
Then I create the VLAN rule/definition, in this case I called it 999 but as I said since it will not pass VLAN's the ID is not used.
Now I can turn POE on Port 1 and power a radio and use port 8 to go to a router and I now have a manageable mid-span injector. Ports 1 and 8 are seperated into a little 2 port logical switch / mid-span injector that you can manage.But since I used U on Ports 1 and 8 the ports will only accept Untagged packets and will not allow VLAN tagged packets to pass.
So if I wanted the mid-span to allow both Tagged and Untagged packets I would simply use Q instead. And once again since it is a Q on both ports the ID does not matter as it will not care what the packet coming in is Tagged as and will encapsulate it inside the ID number you give the rule but the outter VLAN ID will be stripped when the packet leaves the other port. So in a sense using a Q on both ports tells the switch to accept any packet in regardless if it is a Tagged or Untagged packet and when it leaves the other port it will be the same as when it came in.
So you could take a WS-24-400A and configure it to handle 13 mid-spans since there are really 26 ports including the 2 SFP ports.
Once setup your done.