update.
The problem was the FS.com DAC, I got the XS+DA0001 DAC from Mikrotik and it works great.

There were problems with using the SFP+ port on the 4011 with DAC cables in the past. The issue has been fixed in RouterOS, but we still use optical connections on 4011s and have no issues.

I would change to optical and see if the FCS errors continue.

Thanks for the suggestion, I will try that.

scrap that, 1Rx FCS Error came up, its just 1 but still not good

I cleaned the part that goes into the switch, not a great way to clean but I used a cotton cloth, will see if errors will show up, usually I get errors right away, but will see

The problem looks to be solved by cleaning the DAC's SFP modules.

Anything?

Thanks

Hi, I got my switch uplinked via 10G DAC Active (DAC fs.com https://www.fs.com/de-en/products/74625 ... &id=147869 ) on the switch I keep getting these error Rx MAC Errors, Rx FCS Errors and Tx Pauses, switch firmware v 2.12.

Do SWOS have SFP+ bugs?

thanks,

regards

*) fixed problem where switch locked up after a while and only small packets could be sent;

Thank you.

Chris

Looks like we got the fix ) , V2.12

*) fixed problem where switch locked up after a while and only small packets could be sent

@Paternot Adopting Unifi APs means you bind them to your controller and they automatically receive the wifi SSID and settings. @k6ccc Thank you for sharing, I disabled IPV6 on my routerboard as you suggested and tried re adopting my existing AP and did not get a hang, I have another batch to adopt s...

@Nom
Thanks for sharing.
Its not just updating the Unifi gear that knocks the switch but Adopting, I can reproduce this nearly every time I adopt a unified device. Its a shame if this problem does not get fixed as I bought this switch to try out, really hoped to start using Mikrotik switches.

For some strange reason, I can easily reproduce the problem by adopting and upgrading Unifi APs. Yesterday I had to adopt 6 to my controller and the switch hanged on almost all of them.

Since I turned off IGMP snooping I have 23 days uptime, do not know if that was the problem, will see how it keeps going.

Having the exact same problem.
I must reboot the switch every couple of days.
CSS326
SWOS v2.11

Gentle nudge.
I need a new router, choice is 4011 or ER4, one has some features I need and the other has SQM. Please make my decision easier!

I have the same situation.
Another Vote for SQM

Thank you.
You really helped.

Regards

Chris

In ROS packets of single connections are handled by same CPU core. Which makes total sense as this way chances of out-of-order delivery are slim. In case of IPOE, every client connection (TCP or UDP) counts as single connection, meaning that multiple users browsing internet will have many open conn...

Hi guys,

Is PPPOE wan single-threaded?

I am testing out a ISP FTTH but uses PPPOE and looks like 1 core gets much higher than the others, I also have another ISP that I was thinking of replacing that is IPOE this uses all cores .

Thanks for any info

First Thanks to Mikrotik team for their great product. All I would like to say is Implementing a modern AQM would be really great for example fq_codel.

Anyone pls?

Hi. I created a hotspot with user manager and all works great. I created a limitation to limit each user to example 1mbps up and 10 down, that also works fine, I created a simple queue to limit the total bandwidth for the Guest vlan to example 50down and 5 up, so each user gets 10/1 but all users do...

Thanks hope this will get fixed

Thanks for your detailed and well explained reply. Is this a limitation with Mikrotik? as other routers I used always distributed among all cores even though speed test is a single connection Maybe other routers provide only multiple TCP connection count. Did you noticed differences between speedte...

Thanks for your detailed and well explained reply.

Is this a limitation with Mikrotik? as other routers I used always distributed among all cores even though speed test is a single connection

Hi Guys. First time Mikrotik user and I really like it, I have a HEX to play around and learn before buying the CCR version, I got everything working but I can't understand 1 thing, why is speedtest.net maxing out only 1 core but for example speed test in DSL reports uses all cores? so in speedtest....