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dwisehart Author

Level 1

23 points

Mac Studio Ethernet issue with native port

I have been connecting my M1 MacBook Pro to an Ethernet cable using one of the Apple/Belkin USB-C to Gigabit Ethernet Adapters. It works great.

My Mac Ultra Studio showed up yesterday. I unplug the cable from the adapter and into my Studio's native ethernet port: disaster. Fully 50% of a ping's packets are being dropped.

I unplug the ethernet cable from the native port, plug it back into the USB-C adapter I have been using with my MacBook Pro, only this time I plug the USB-C end into one of the Studio's USB-C ports. It works great and no ping packets are being dropped.

What is going on with the native Ethernet port on my Studio? I tried setting the speed manually to 1G but have the same results. Thanks for your help!

Mac Studio

Posted on Apr 10, 2022 8:17 AM

Top-ranking reply

Grant Bennet-Alder

Level 10

133,411 points

Posted on Apr 10, 2022 10:59 AM

each medium on your Mac studio has its own unique setup, so it is really easy to mess things up.

• set

System Preferences > Network > Ethernet > (advanced) >TCP/IP > IPv6 ... to Link-local only

ON may cause routing activity that interferes with your networking. OFF will make it hard to find printers and other services on your network.

If you have enabled ANY VPN features in system preferences > network

these can interferer with regular network operation.

“Limit IP address Tracking” has been shown to be an issue on some Networks (this example is for Ethernet):

< Limit IP address tracking >

If you are using a VPN you installed on your own, remove it while continuing to debug. Also remove ALL devices in the left pane related to VPN in:

System Preferences > Network

f this VPN is for an Institutional/Corporate connection, contact your institution for additional guidance.

If you continue to have trouble after using these steps, create a new named Network "Location" -- a collection of settings applied "all at once" when you select it. Every new named "Location" you create starts with all defaults, which lets you walk away from any bogus settings that might be causing you trouble:

How to use network locations on your Mac - Apple Support

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Mac Studio Ethernet issue with native port

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