Timeline for Why do I need to unplug my Ethernet cable or restart network service to renegotiate connection speed? [duplicate]
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Nov 2, 2021 at 9:19 | comment | added | Michael Prescott | I crimped CAT 7 cables myself and they're run through walls and attic, so changing those weren't an option. I tried new patch cables with no resolution. So, I got a new switch. No problems so far. I think that is near the root of the issue. It's interesting that no other 1Gbs adapters have problems with the old switch. Only the iMac with a 10Gbps adapter (re-discovered/reminded of that). Anyhow, seems ok, I hope it lasts. I wonder when 10Gbps switches will become norm. Right now, a copper 10Gbps is way too expensive. | |
| Oct 28, 2021 at 14:00 | comment | added | Tetsujin | The thunderbolt connetion is just a red herring & not pertinent to the issue, then. If your hardware interface is dropping to 100BaseT, then suspect physical connectivity issues. Change cables, get contact cleaner on the plugs & sockets & insert/remove a dozen times rapidly [with all power removed from the connectors] | |
| Oct 28, 2021 at 11:51 | comment | added | Michael Prescott | @Alper 's reference doesn't really address this problem. Good to know about iperf usage, but I don't see anything in my router causing the slow down. I did watch network preference panel for a while, inspired by that issue, and saw the Ethernet drop/deactive and a second later it re-activated negotiated from 1Gbps to 100Mbps. I think the issue is macOS or the adapter. Just don't know how to fix it properly, yet. I can force it to drop again as noted above and it picks up to 1Gbps again, but that is such a kludgy solution. | |
| Oct 28, 2021 at 11:47 | comment | added | Michael Prescott | No typo. That interface is a thunderbolt connection between the two iMacs. It's really nice. | |
| Oct 28, 2021 at 7:27 | comment | added | Tetsujin | 16.4 Gbits/sec !?! Typo? | |
| Oct 28, 2021 at 5:20 | comment | added | nohillside♦ | In case the answers on the other questions don't help to solve the prolem, please edit the attempts you've made into your question here. It will then get put into the review queue for reopenings. | |
| Oct 28, 2021 at 5:19 | history | closed | nohillside♦ macos Users with the macos badge or a synonym can single-handedly close macos questions as duplicates and reopen them as needed. | Duplicate of macOS artificially restricts speeds to 100 Mbps over Ethernet | |
| Oct 28, 2021 at 4:10 | review | Close votes | |||
| Oct 28, 2021 at 5:19 | |||||
| Oct 28, 2021 at 4:07 | comment | added | Michael Prescott | Thanks @Alper, I've installed iperf and when performance drops again, I'll bind to the en0 interface and test between the two iMacs to see if that also drops to 100 Mbps vs. just using internet speed tests. At the moment I'm getting 16.4 Gbits/sec on one interface and 939 Mbits/sec on the problematic one. | |
| Oct 28, 2021 at 3:49 | comment | added | Alper | Does this answer your question? macOS artificially restricts speeds to 100 Mbps over Ethernet | |
| Oct 28, 2021 at 3:38 | history | asked | Michael Prescott | CC BY-SA 4.0 |