CRS125 Help

RouterOS Beginner Basics
1

OK, I’ve got a brand new crs125-24g-1s-rm switch. Right now I have it configured as one subnet (1 master port, 22slave ports). The device seems to act as more of a hub than a switch. I don’t believe I have any bridged ports setup. For example, I am seeing high transfer rates on multiple ports when in reality one device on one port is accessing a NAS device. There are no vlans and no bonding protocols involved. Yet there is way too much traffic on way to many ports for this to be truly switched ethernet.

Second issue. This one is a head scratcher. We have an old Mac Pro. It sits unused and powered off in the server closet. If this Mac Pro is connected to the switch, the network speed falls to a MAXIMUM of 10mbps on all ports. Note the Mac is POWERED OFF. If I disconnect the Mac, network speeds return to normal. Why is this? I have not tried to turn the machine on as I don’t have a monitor for it in that room.

2

What version are you running? There were some bugs with 6.6 to 6.8ish… I’d update to 6.10 and completely reset the config.

3

Good Point. I did upgrade to 6.10 when I pulled it out of the box. After doing a bit more testing, I am convinced this isn’t a switch it is a hub. When I move large amounts of data from one port to another, Most of the other active interfaces are flashing and showing received packets. Also the transfer speed from my workstation to the NAS falls as I attach more devices to the CRS.

I’ve read a number of comments that indicate that I should unslave all of the interfaces and bridge them together. I just don’t think the CRS has enough CPU to manage wirespeed switching in that configuration. Apparently Mikrotik doesn’t either or they would not have added switching hardware.

I will reset to factory default and try again, but honestly I all have done is change the IP address and the admin password. Thanks for your comments.

4

ROS 6.6 is the last one which works correctly on the CRS regarding switching. Later version including 6.10 do not.

5

What’s wrong with 6.10?

Sent from my SCH-I545 using Tapatalk

6

It sets the switch in the crs to work like a hub. All incoming traffic is redirected to all ports.

7

I’m on 6.10 and it is working just fine… make sure your on firmwaer 3.12 and you completely reset your configuration after you upgrade to 6.10

8

Let me show you!
The same traffic from 2 video streams, nothing more…
And it is not only the picture. The traffic is visible via sniffers.
Firmware is 3.12. But having to reset the router configuration after each upgrade is absurd at best.

First the correct picture:
125-switch-6.6.jpg
And then 6.10:
125-switch-6.10.jpg

9

Interesting… I’m running 6.10 and I definitely don’t have that problem any more… you try resetting the full config?

10

Sorry, but writing hundreds of lines just to get a workaround for a bug just to have a deeply buggy firmware on the router is a little to much.
I will try reseting the device to defaults and restoring the configuration from backup.

11

Nope… don’t restore the config. Export it and then only pull in the stuff you actually need. If you backup and restore it has the bad values in it.

But I agree with the general buggyness.

12

Ok. It seems I can confirm it.
Resetting the configuration will make the switch work normally.
But it is still a bug :laughing:

This is what all the ports had set in the old config and is missing now:

set 0 isolation-profile=1 per-queue-scheduling="strict-priority:0,strict-prior\
    ity:0,strict-priority:0,strict-priority:0,strict-priority:0,strict-priorit\
    y:0,strict-priority:0,strict-priority:0" qos-scheme-precedence="dscp-based\
    ,vlan-based,protocol-based,da-based,sa-based,pcp-based,ingress-acl-based,(\
    unknown)"

But still after adding this configs, it is still working correctly!

13

I agree… and its annoying. But at least it is working now.

14

Thank you. That did solve the problem. Weird. Still having issues with that Mac Pro. When it is powered on, all is good. If I shut it down the network craps out completely. Tried different ports and different cables. No joy. If I plug the Mac into an unmanaged switch and then plug that switch into the CRS, all is good.

15

Mikrotik support posted the solution to the hub-like behavior without configuration reset:

/interface ethernet switch port set [find] learn-restricted-unknown-sa=yes

Regarding the MAC: I would try to disable autonegotiation on the specific port (just an idea…).

16

… (was aimed at a spam message)

17

That is odd.