Anyone seeing speed drop on a 2G+ plan since upgrading to 15.0?

[msncookie]

That is even weirder. I have two 2.5 GbE switches (both unmanaged and pretty cheap) between my Mac Mini and my NAS, and I get the full 2.5 Gbit transfer in both directions.

For the record, I even tried disabling IPv6 in case that had something to do with it for remote connections, as I have it disabled on my NAS at this time, but it made no difference; then again, with global IPv6 addresses work the same regardless of how many hops there are. Disabling wifi and the built-in ethernet, and leaving only the 2.5 adapter on, doesn't seem to make any difference either.
I've even spent some time looking at my output for netstat -rn, but I can't really find anything out of the ordinary.

At this point I think we can only hope someone at Apple cares enough to look into it from the inside.

I should have also mentioned, if I force the switch port down to 1G then my 100-300 mbps download goes back up to the proper 1 Gbps. Obviously, I have a managed switch that allows me to test that, but it shows that whatever this issue is, it must be related to 2.5G negotiation/link speed.

 

[donawalt]

This has been almost 4 months since I first reported it, and Apple has not fixed it. I filed a bug report as well; if you all haven’t, you should, so Apple is aware of it at a higher volume.

Maybe for some reason it can’t be fixed.

We’ve also tried this with multiple 8156 adapters. It’s the same on all of them. My solution was, quite a while ago, to move to an adapter with the 8157 chip - problem solved. I’ve kept the 8156 adapters, I hope Apple fixes this, but at this point, I have extreme doubt.

 

[jollino]

Maybe for some reason it can’t be fixed.

We’ve also tried this with multiple 8156 adapters. It’s the same on all of them. My solution was, quite a while ago, to move to an adapter with the 8157 chip - problem solved. I’ve kept the 8156 adapters, I hope Apple fixes this, but at this point, I have extreme doubt.

It can and should be fixed, since it's clearly a software issue. The same adapters worked perfectly well on Sonoma, there's no reason why this would be any different.

I read on another site (Ars? can't recall, I've been stalking the problem in a lot of places) that the 8157-based units only "solve" the problem because of the higher internal throughput, but some people using them for 5 Gbit links found that they, too, are limited to around 4 Gbit in Sequoia. They just have more wiggle room, so to speak.

 

[donawalt]

Has anyone tested this with 15.3 beta?

 

[DanPDX]

No different in 15.3

 

[maxsquared]

For those with a Realtek RTL8157 (USB3 to 5gbe) looks like there is a new driver and now 5gbe is recognised in both system settings and system reports.

 

[jollino]

For those with a Realtek RTL8157 (USB3 to 5gbe) looks like there is a new driver and now 5gbe is recognised in both system settings and system reports.

I gave in a few weeks ago and bout a Wavlink 5GbE adapter, and IIRC Sequoia identified it as such already. I may be wrong, though! It definitely did and does not have the "1.8 Gbps cap" problem:

It's especially nice to max out the transfers to and from my NAS.

 

[maxsquared]

I gave in a few weeks ago and bout a Wavlink 5GbE adapter, and IIRC Sequoia identified it as such already. I may be wrong, though! It definitely did and does not have the "1.8 Gbps cap" problem:
View attachment 2497849
It's especially nice to max out the transfers to and from my NAS.

Ye, but it didn't have a "complete" driver, but with MacOS 15.4 released yesterday, the system is able identify the device and able to change manual speed in system settings. Not sure how much improvements, but this means Apple had added driver support for this Realtek chip.

 

[Delgomato]

Hi, any improvement with Tahoe?
Just got a MacBook Pro M4 on Sequoia and a 2.5Gb Ugreen Ethernet adapter and I am limited at 1945Mbps