You cannot simply swap out the SFP and have the port type change.  An RF is a fiber director converted to be an RDF port, it uses the fiber protocol.  An RE is GigE so it uses TCIP and has an IP address assigned to it.  If you want to convert them you will need hardware and EMC to do it. 
Can anyone advise if the only difference between an RA and an RE port, is the SFP that is installed?  I need to migrate data from a DMX3 to a VMAX, and was hoping to do so with SRDF.  I have 2 free RE ports on my DMX and 2 free RF ports on my VMAX, I already run async srdf between two sites, so the only piece missing is the port connectity.  Since I can't convert an FA to RF without a bin change in a DMX, I was hoping maybe I would be able to simply swap the SFP on the RE end and it would automatically change to an RF port instead.  Does anyone know if this is possible?  If not, does anyone have any other suggestions that I may not have thought about?  They arrays would be connected via brocade switches, I was told a direct connect method would not be possible.  Thanks in advance for any help.  Shawn
RE and RA ports