RouterOS v7.2rc1 Router’s model RB5009UG+S+in I have a 1000Mbps downlink connection to my ISP. When connected via the 2.5G link on port 1 to the ISP cable modem, the connection speed maxes out at about 500Mbps When removing the 2.5G negotiation speed on ethernet1 inside RouterOS and connecting t…

I have the same issue and there are a ton of others out there having it as well. In fact I haven’t seen anyone claim that the 2.5G port works for them. It seems to be an issue when you go between speeds. 2.5G port - WAN SFP+ port - S+RJ10 connected to PC at 2.5G In this setup the 2.5G PC can get …

I have the same problem with the 2.5g port but in an opposite configuration. I made my own post about it: http://forum.mikrotik.com/t/rb5009-2-5g-port-problem/155768/1 In my configuration my WAN port is on a 1g port and my computer is on the 2.5g port on LAN bridge. Since my setup is opposite, my …

I have the same problem with the 2.5g port but in an opposite configuration. I made my own post about it: http://forum.mikrotik.com/t/rb5009-2-5g-port-problem/155768/1 In my configuration my WAN port is on a 1g port and my computer is on the 2.5g port on LAN bridge. Since my setup is opposite, m…

I’m getting about the same performance as jookraw using a similar setup though the 2.5G NIC I’m pointing it at is a RealTek rather than an Intel. It seems the RB5009 2.5G is ok talking to a RealTek. So far I’ve just been playing with it. I’m new to RouterOS and haven’t deployed it yet. When I do…

There may be hope, Mikrotik seems to have reproduced the issue. We reproduced a similar behavior locally. We are looking forward to improving such behavior with different link speeds in further RouterOS releases.

There may be hope, Mikrotik seems to have reproduced the issue. We reproduced a similar behavior locally. We are looking forward to improving such behavior with different link speeds in further RouterOS releases. Did they post this somewhere or is this in response to a support ticket?

Did they post this somewhere or is this in response to a support ticket? Sorry, left that out. It was in response to a support ticket where we’ve been passing supout files, scenarios, etc. I’m eagerly awaiting the next testing branch update to scour over the change log that’s for sure.

I had similar problems with a Realtek RTL8125B. Turning flow control on fixed the problem.

I had similar problems with a Realtek RTL8125B. Turning flow control on fixed the problem. For me, flow control was a completely separate issue but solved just general issues on my network with mismatch link speeds causing buffers to overflow. I’m trying some test builds from MikroTik, will re…

RB5009 Slow Speed 2.5G Bug Report (as requested)

RouterOS RouterOS beta

bparrish February 24, 2022, 10:47pm 10

Did they post this somewhere or is this in response to a support ticket?

RB5009 support