RB4011 SFP Port as WAN

Good afternoon folks I hope you are doing well !

Just to be clear - I have just a ittle bit of network knowledge but I can leanr fast. i bought a Microtik device because the hardware is great for the price and the community is awesome. Thank you for your understanding :slight_smile:

So let me expalin my internet connection :

I business internet and i have 5 static IPS and they are delivered troigh a juniper switch.

I have a SFP-RJ45 Module and it shows the link is up in Winbox. When I select the SFP port for the wan - it just does not work - iff i switch the onfig to ether1, I can have a connection.

Is there something I am doing wrong or it is impossible to onfigure the SFP for internet on the RB4011

https://wiki.mikrotik.com/wiki/MikroTik_SFP_module_compatibility_table
only link with information that I am aware of.

I cannot link my SFP+ port to either of my ISPs using the appropriate MT module to rj45, and they gave up on my ticket for some reason, so dont hold your breath.

Does the SFP port work for other functions, for example if you add it into the bridge (or whatever configuration you have for your other ports). The question may not be “Why doesn’t it work as WAN?”, it might be “Why doesn’t it work at all?”.

Yes I can connect my SFP port on the router to SPF ports on MT switches for example.
I havent tried my sfp+ port on the router to the SFP port on the MT switch though, would make for an interesting experiment.

So if you stick a Gigabit 1000BaseT SFP into the RB4011 SFP+ port, and connect that to a normal Gigabit 10/100/1000BaseT port on another device, say to a laptop, does that work? If the only thing that works is SFP to SFP connections (or SFP+ to SFP) then it sounds like there’s something non-standard going on there.

I meant to scrounge an SFP when I was in the office, but couldn’t find one so the SFP ports on both my Mikrotiks have still never been used. Going by other kit for example Cisco if I stick a Cisco copper SFP into one of their devices, either an SFP or SFP+ port, then it works with any Gigabit Ethernet devices. Never seen any exception.

No what I meant is that I can connect the SFP port on my router to any other SFP port on my MT switches (all rj45 modules).
I have not tested the SFP+Port (with rj45 module) to my MT switches SFP port (RJ45 modules). (test still to complete)

I cannot connect my SFP+Port (rj45 module) successfully to either of my two ISP modems.
I have not tried my SFP port (rj45module) with the ISP modems (test still to complete)

You cant connect SFP+ to SFP, however you can put SFP module in SFP+ cage, then just disable auto negotiation and configure 1Gb/s both sides

Illogical conclusion, if the sfp+ can auto negotiated and the SFP can, then both should mate, and even if the SFP cannot, the SFP+ should adjust.
what kind of crappy coding is this…

I am sure you will also expect that if you connect an Ethernet interface with a token ring interface it should work…

Sorry I didnt see the movie (Lord Tolken of the Ring) :stuck_out_tongue_winking_eye:

Just saying that auto negotiation should work regardless of port capability, to me one is simply faster than the other but the faster one has also the ability to tx/rcv at the lower speeds.
Auto Negotiate…do you need the latin equivalent???

That’s correct. If you install something like this … https://www.fs.com/uk/products/66613.html into an SFP+ slot, then it can connect it to either a 1000BaseT SFP or a native 1000BaseT interface and work at 1gig. Assuming compatibility between equipment and SFP+ of course.