Consider the traffic monitoring setup on the bottom of this page: https://www.ntop.org/pf_ring/port-mirror-vs-network-tap/
The two lines of a network tap are connected to a switch which merges the traffic and then sends the traffic to a PC for analysis. I'm not sure, however, how this will work when multiple connections are used since one the of the desribed outcomes is that packages will be broadcasted to all other ports. As an example we want to monitor 3 100mbit connections over copper and use a passive tap. From each of the connections two cables will go to the switch and overall 6 ports will be occupied. The switch will then mirror all these ports into a single (TX ?) connection e.g. to a port with a SFP adapter. Since, according to the website, no traffic from the monitoring PC should be send back to the switch just connecting TX of the SFP to RX of the SFP on the PC should be enough. According to the website an alternative would be using ethernet and cutting the TX side from the PC.
But what would happen with the broadcasted traffic from port 1 to e.g. port 6? Would port 6 broadcast that traffic again to all other different ports resulting in a broadcast storm? If yes, what would be appropriate countermeasures? Is it possible to disable broadcasting and only send traffic to the specific SFP port?