thunderbolt bridge-ethernet connection not working

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Level 1

48 points

thunderbolt bridge-ethernet connection not working

I am running a MBP intel with macOS 11.6.2 platform and 2 Thunderbolt ports. I travel much and sometimes Wifi is not available and I have to use the ethernet cable. Before upgrading to Big Sur it was automatically connecting and working well.

But now the thunderbolt bridge does not connect although when I look into About this Mac, System Report, it says connected.

When I switch the cable to the other port, it also reports 'connected' to the other port in the System Report.

But, I have no internet connection because in the System Preferences-Network panel it reports: Thunderbolt Bridge not connected. How should I configure this?

Could any one help me out?

MacBook Pro 15″, macOS 11.6

Posted on Jan 13, 2022 6:26 PM

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Answer 1

Barney-15E

Level 10

122,420 points

Jan 14, 2022 4:57 AM in response to Lance.scs

Are you using an actual Thunderbolt to Ethernet dongle, or is it just a common USB to Ethernet dongle that uses a USB-C connector?

Apple does sell one, but most of the others only say “Thunderbolt” in reference to the USB-C port, not that the device uses Thunderbolt.

Do you have a USB 10/100/1000 service available in Network System Preferences with it connected?

If it’s not an Apple adaptor, it may not be supported in Big Sur.

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Answer 2

Lance.scs Author

Level 1

48 points

Jan 14, 2022 5:06 AM in response to Barney-15E

I am using only Apple stuff.

I just had to reset actually reconfigure my modem and all works fine again.

Thanks anyways for your answer.

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thunderbolt bridge-ethernet connection not working

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