@S-K I did not test but I think you can try set up 2210MP switch B uplink port as Mirroring port(to mirror to virtual machine) , and on switch A downlink port set up as Mirrored port(and use another port on switch A to mirror this downlink port).

  @Somnus With uplink an downlink port you mean the ports that connect the switches to each other? Then I would mirror all the traffic traversing the two switches, wouldn't I? I only want to mirror traffic from/to one specific port.

Unfortunately these switches don't support RSPAN like Cisco or HP do. So I guess this won't work at all and I have to mirror directly on switch A (TL-SG24248P).