/interface ethernet print
/interface ethernet set ether1 name=ether4a
/interface ethernet set ether2 name=ether3a
/interface ethernet set ether3 name=ether2a
/interface ethernet set ether4 name=ether1a

/interface ethernet print
/interface ethernet set ether1a name=ether1
/interface ethernet set ether2a name=ether2
/interface ethernet set ether3a name=ether3
/interface ethernet set ether4a name=ether4
/interface ethernet print