ehternet with RB493

Recently purchased a RB493 for wired home use. I have assigned ether0 to Public and ether1 to Lan with ip of 192.168.15.0 /24 Everything works fine. Presently I have ether1 connected to a separate ethernet switch that connects to a half dozen computers with static ip addresses all on the 192.168.15.0 /24 network.

Is it possible to use the other seven ports ether2 to ether9 on the 493 board as an ethernet switch that serves the 192.168.15.0 / 24 network? This would allow me to remove the external ethernet switch I have connected to ether1. If so, how would I configure ether2 to ether9 ?

It is under
/interface ethernet
set ether2 master-port=ether1
set ether3 master-port=ether1
and so on…

Surfer Tim,

Thank you.