S+RJ10 r2 issues

Hardware MikroTik hardware general
1

I recently got a pair of S+RJ10 to use in a pair of CRS326-24G-2S+ switches. The goal was to get at least 5 Gbps over existing CAT6 cabling.

I ran some tests on link speed and found (using CAT6 cables):

  • 5m cable: stable link up 10G
  • 25m cable: stable link up 5G; according to the specs, I should have gotten a 10G link, but this is acceptable.
  • existing in-wall 20m cabling + 2m worth of patch cables: unstable 10G link (flapping every few seconds)
  • existing in-wall 20m cabling + 2m worth of cat5e patch cables: no link - according to specs I should have gotten at least 1G, and I do get 1G if I use one of the switch’s other ports on one side.
  • existing in-wall 20m cabling + 1m patch cable + 25m cable: stable 5G link ← this is how I’ve left it for now

Anyone have similar experiences with S+RJ10?
Do I potentially have a defective module? Or is this expected?
Is there a way that I can just force the S+RJ10 to 5G mode without an extra 25m cable? I tried toggling the advertised speeds in ROS UI, but the status always showed it advertising all speeds (and receiving advertisements from the other side for all speeds).

I would have expected the modules to link at a lower speed if my cabling wasn’t good enough.

For ROS, I tried both LTS (6.45.9) and stable, for both switches, no difference.

2

Cat 6 isn’t for more than 1Gbps, you need Cat 6A shielded cable for more speed.

Regards.

3

No, 10GBASE-T is supposed to do 10G over CAT6 to a maximum of 55 meters. CAT6A is needed only to reach 100m.

My experience with the S+RJ10r2 is roughly the same as the OP’s; I had a 20m run of good CAT6 that I couldn’t get more than 5G over. I stopped using copper and went to SR optics. OM3 fiber costs about the same per meter as UTP nowadays, and the transceivers are significantly cheaper. Not to mention you can’t heat your tea with them, like you can with the average copper SFP+…

4

Good to know that I’m not alone, but that’s a bit disappointing from Mikrotik to have the specs outright wrong.

Yeah, if it weren’t for the cost and pain of tearing up walls and ceilings, the fiber modules+cabling would have been cheaper than the copper modules+reusing existing cabling.

5

Yes, that’s a problem. I had the luxury of being able to get rid of the UTP cable and use OM3 fiber instead, but you can’t always do that.

6

Hi folks,
Just got an RJ10 for the SFP+ port on the CCR1009.
The cage is recognized by the router see 3+Volts and version 2.16.
However was unable to get any traffic it through it?
I currently have my 1gig ISP connection through ether6 which runs on vlan xx.
I added the SFP+ ethernet port to the WAN interface member list and moved vlan xx to the SFP+ interface and then plugged the cat7 cable 3m, from eth6 into the cage.

The cage is defaulted to auto-negotiate but I got nothing.
I tried turning auto off and setting 1gig speed, no dice.
I tried it also as 1gig and 2.5gig no dice
I tried it as only 100m no dice.
(Note: Full duplex always checked)

Should I be playing with any other parameters (tx and rx flow control?, anything else?)