Hii there,
I just got in my CCR2004-1G-12S+2XS to replace my CRS326-12G-12S+RM as a router (and make it just a switch) and went to hook it up.
Once I was done, however, I ran into a pretty big issue.
Any direct uplinks (to server and my desktop) made through my SFP+ are rather bad.
This is the upload from my desktop to speedtest using SFP+:
Oddly enough, when I disable my SFP+ port on my desktop and use the gigabit port to my switch that is also hooked up using SFP+, everything is just fine.
Additionally, when I try to upload a file to my NAS over SFP+, it can barely outperform a gigabit connection to that same server (and it isn’t the server nor desktop, because previously, it could hit 10Gbit transfers just fine).
This is how I hooked up my gear:
- CCR2004 —SFP±–> Desktop
- CCR2004 —SFP±–> Server
- CCR2004 —SFP±–> CRS326
- CRS326 —UTP-----> Desktop
Everything else is the same really…
The same modules and fibre cables were used in conjuction with my CRS326 (I basically just took them out, put them in the CCR2004 and connected the cables back up again) and everything worked perfectly fine on that.
So I’ve done some deeper diving and found that the 10Gbit speed to my server is due to the thing lacking the switching performance to do this.
Though it doesn’t explain why I can’t hit my full upload to speedtest while with a switch between it I can 
Have you tried setting the queue type to mq-pfifo on the CCR2004?
What version of ROS are you using?
I have set my queue type to an mq-pfifo resulting in this:
# INTERFACE QUEUE ACTIVE-QUEUE
0 ether1 only-hardware-queue only-hardware-queue
1 ;;; To Modem
sfp-sfpplus1 multi-queue-ethernet-default multi-queue-ethernet-default
2 ;;; To Main PC (sfp+)
sfp-sfpplus2 multi-queue-ethernet-default multi-queue-ethernet-default
3 ;;; To Isoroku (sfp+1)
sfp-sfpplus3 only-hardware-queue only-hardware-queue
4 ;;; To Isoroku (sfp+2)
sfp-sfpplus4 only-hardware-queue only-hardware-queue
5 sfp-sfpplus5 only-hardware-queue only-hardware-queue
6 sfp-sfpplus6 only-hardware-queue only-hardware-queue
7 sfp-sfpplus7 only-hardware-queue only-hardware-queue
8 sfp-sfpplus8 only-hardware-queue only-hardware-queue
9 sfp-sfpplus9 only-hardware-queue only-hardware-queue
10 sfp-sfpplus10 only-hardware-queue only-hardware-queue
11 ;;; To Switch (sfp-sfpplus1)
sfp-sfpplus11 only-hardware-queue only-hardware-queue
12 ;;; To Switch (sfp-sfpplus2)
sfp-sfpplus12 only-hardware-queue only-hardware-queue
13 sfp28-1 only-hardware-queue only-hardware-queue
14 sfp28-2 only-hardware-queue only-hardware-queue
15 ;;; To Switch
bonding1 no-queue no-queue
16 bridge1 no-queue no-queue
But this sadly doesn’t change anything.
Most of the router settings are basically just defaults (not using quickset).
The version is 6.48.3.
The CCR2004 is notoriously bad at switching, so you probably need to use a real switch instead.
Yea, I already found that elsewhere too, but it doesn’t explain why the upload using speedtest.net is so bad…
I had a similar problem and the issue was the SFP+ not autonegotiating to 1 gigabit, so it stayed on 10 gigabit and kept trying to push that kind of signal through a 1 gigabit interface in the other end.
The link to the modem is 1gbit.
The download from the ISP is 300mbit and my upload is 30mbit.
I can reach the 300mbit download pretty fine through the SFP+ but the upload is only 1/3rd of what it should reach.
So even if it didn’t negotiate down, it doesn’t explain why my upload is so poor.
Can you show the “Status” tab for the sfp-sfpplus port that goes to the modem/ONT?
Yes I can 
Though it doesn’t seem like anything weird is going on there?
The “rate” is 10Gbit because I use an SFP+ module but the link to the modem itself is 1Gbit (the modem only has 1Gbit ethernet ports on it).
Also, considering that if I use the 1gbit RJ-45 connection (which goes through my switch first, then router, then modem) my upload using speedtest.net is just fine, I wonder whether that’ll be the issue anyways.
You might want to try rate limiting on your modem port (probably egress) to close of what your internet speed is. When you have a 10 gigabit link but the actual connection is much slower you will get tons of retransmits and the speed will be much slower.
By rate limiting, you can normally get the speeds you are looking for while still being able to route traffic on the other ports at the correct speeds.
It’s worth a shot to try.
Nothing weird going on there? Your module is SFP+ but it should be negotiating to 1Gbps if that is all that your modem supports. I haven’t had experience with this module to understand how it shows the auto negotiation for lower speeds practically speaking, but I can certainly see an issue if you have an ethernet link where one side of the cable is transmitting at 1Gbps and the other at 10Gbps.
I assume you are using the S+RJ10 module. Looking at the Mikrotik wiki I see the following warning
The latest revision of S+RJ10 contains "/r2" by the end of serial number. It comes with following improvements:
Jumbo frames up to 10218 Bytes at 2.5G, 5G and 10G speeds;
Actual link speed reporting;
DDM monitoring (Supply Voltage, Module temperature).
I believe that “Actual link speed reporting” means that the original S+RJ10 (without the /r2) did not report the actual link speed in the status tab (i.e. the negotiated rate), but the one with r2 should. Which version of the module do you have?
Tested it, setting it slightly under what I should be able to get (300/30 is what I should get, set it to 250/25) but this only lowers download without affecting upload at all (just stays around being far too low).
No, I’m using a module from FS.com (vendor part number “SFP-10G-T”)
I’ve already manually set it to 1000M but then it just doesn’t work all together.
But it also doesn’t explain the issue where with the switch, it works perfectly fine? The link to the modem is the same in that case but somehow it isn’t affected by the issue?
PC → Switch → Router → Modem: Can use full download and upload perfectly fine
PC → Router → Modem: Can use full download, can’t use full upload.
The SFP+ module could be autonegotiating correctly to 1Gbps in the switch but not the router.
That is definitely an option yes.
Though I guess I’ll see about performance at the end of the month since I’ll be ordering a switch to fix the well… switching issue.
Maybe that’ll also solve the issue with the upload speeds?
Sadly, adding an additional switch (CRS317-1G-16S+) didn’t work, for fixing the upload speed
.It did, however, fix the LAN speed, so that’s worth something.
Hi hi, hi-de-ho~
So I’ve been fiddling around and discovered the issue wasn’t with the network itself, it was my Windows PC.
Apparently, I had to disable the “Large Send Offload V2 (IPv4)” setting for my NIC in the device manager.
Durr.