RB750GL Setup as port mirroring

Hi All,

I am new here and I am also new in this router OS. I am planning to capture all the packet of an router using Wireshark. The connection is like this,

->Router(Connected from WAN to erther 3)
ISP modem(Connected to erther2) → RB750GL
->Laptop with Wireshark(Connected to erther5)

I set the RB750GL erther2 as Mirror Source and erther5 as Mirror Target.

But I unable to get the Internet working.

Any setting that I miss out?

Thank you

You, probably, need ports ether2 and ether3 configured for switching to be able to forward the data through.

/interface ethernet set ether3 master-port=ether2