SFP Modules in all Mikrotik Gear that I have used including the CCR, CRS and RB2011are hot swappable.
So you can switch to fiber live.
Hope that helps
add action=dst-nat chain=dstnat comment="Remote SSH Access" dst-port=\ 22 in-interface=ether1-gateway protocol=tcp to-addresses=192.168.0.164 \ to-ports=22Here is an example DST NAT with Dynamic IP see instead of using Packets IP I read which port the packet comes in on