Hi guys,
Is it possible for me to use the SFP port with a rj45 adapter to allow me to free up all the integrated RJ45 ports?
My internet is current feeding the rb4011 via cat 5 from the ISP modem.
Cheers!
According to official SFP module compatibility matrix you should be fine when using either S-RJ01 (1Gbps SFP) or S+RJ10 (10Gbps SFP+).
I recall some reports about autonegotiation problems when using these SFP modules so you may want to go through forum threads (I don’t use these modules hence my interest in mentioned problems is marginal hence I don’t remember the details) to see if the problems were resolved or if there’s some work-around needed.
Neither the S-J01 or SR-J10+ cage are working with my ISP with my particular router CCR1009 (tile), however the S-J01 cage works great when connected to the LAN network and on my RB260 switches. Havent tested the S-J10+ on my LAN, slight overkill 
Hello,
I have used the 10G SFP+ RJ45 Copper Transceiver, 10GBase-T Module for Cisco SFP-10G-T-S, Ubiquiti, D- Link, Supermicro, Netgear, Mikrotik (Cat6a/7, 30-Meter) from Amazon in my RB4011 without any issues. Worked right out the box.