virtual adapter

Is it possible to first test a bridge and tap, and maybe even a virtual network interface, before applying it to a VM? I imagine the virtual interface would not be the same one that the VM would create, but, this would be a nice troubleshooting step for getting bridged networking to work on...

Hello, I'm trying to figure out whether/how it may be possible on FreeBSD to create a network subinterface with a different network subnet IP. I do not want to use the concept of "alias" (multiple IPs on single interface). I would like to use a subinterface of a parent. On Linux I can do this...