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Edited: Jan 31

MA2500D 'Network Cable Unplugged' Drops

Hello,

I got my adapters set up about a week ago and they've worked great for the most part. However, I've begun to run into an issue where if I'm performing activities with a lot of network traffic, the connection will reset (showing 'Network Cable Unplugged) in Windows and then reconnect a second later.

Setup:

ONT (Fiber Gateway) <-> Cat6 Ethernet <-> GoCoax MA2500D <-> Coax through 3GHz Barrel <-> GoCoax MA2500D <-> Cat6 Ethernet <-> Intel I211 Gigabit Adapter/PC

Firmware: 2.0.11

Link speeds look great as far as I can tell, and I assume maxed out:

But it does appear to be generating dropped Rx packets when this happens:

I can recreate this failure mode by doing something network intensive (like running a speed test) and then changing between web pages. I've noticed some video games will also exacerbate this effect.

Any help/settings to tune would be appreciated!

EDIT: Think I may have found a fix... I disabled 'energy efficient ethernet' on my adapter in Windows and haven't seen the problem come back. Will continue to monitor...

16 answers4 replies

20 Comments

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The Tech Geek

Feb 06

Thats an interesting fix for a directly attached device but an unmanaged switch sadly doesn’t have that option.

ManniX

Aug 09

I did a check since I have a Realtek 8125 2.5G NIC (MSI B550 Unify-X) connected directly.

I've run a long iperf test to my NAS which is connected at 2.5G via a QNAP switch to the other MA2500D.

Couldn't reproduce the brief disconnections with EEE enabled.

But then I left a ping running toward my NAS server while running the iperf transfer and noticed the latency increasing from 3-4ms to 40ms.

Disabling EEE on the NIC brought back the latency to 3ms while running iperf.

It's definitely recommended to disable it in any case.

ManniX

Aug 09

Replying to

Yes if it's an unmanaged switch with EEE you are doomed.

But even if you have one without EEE, like my QNAP QSW-1105-5T, and you don't have any network disconnection doesn't mean that it's working properly.

Better to disable EEE in any case, at least till it's fixed.

BTW when running iperf the latency it's not 3ms, wanted to say one-digit, fluctuates between 6ms and 8ms mostly.

goCoax

Aug 09

Replying to

Thanks for your update.

We saw the chip vendor released some new firmware to fix some issues.

If you need any support, please let us know.

ManniX

Aug 10

Replying to

Do you mean Realtek? Or Maxlinear?

To be honest never had problems.

I could only notice this weird higher latency while running iperf.

It's a signal that something doesn't work as it should but quite a corner case, I guess nobody is playing games while running iperf :)

Andrew

Aug 08

I'm experiencing what I think is the same issue.

MA2500C <-- 30ft RG6 --> MA2500C

The issue occurs when there's a switch that supports 802.3az/EEE in between. Have rotated in different brand switches (all of which support EEE - all behave the same). No frames dropped per the web interface in either adapter. The problem exists with different RG6 pulls. I wonder if perhaps most users don't even notice it since the interruption is brief. Fantastic performance outside of the 1-2 second drop every 30mins (though the drops seem to be based on traffic load).

To help diagnose this issue, would it be possible to release a firmware with the ability to disable 802.3az/EEE?

Andrew

Sep 16

Replying to

Just wanted to share that my issues are completely resolved. I have a fairly complex environment but there were two contributing factors - either EEE or STP (spanning tree) enabled on a switch connected to any MA2500C/D. With EEE enabled anywhere, there are symptoms similar to this. With STP enabled, the symptoms are periodic packet loss (but otherwise completely normal operation outside of these hourly periods of 30 second packet loss), but without any loss indicated by the web ui.