Level 1

9 points

macOS Monterey 12.0.1 and intermittent network connectivity

I have a 2019 13" Macbook Pro and have been successfully using it with my Google Nest Mesh wifi and fiber modem for a couple years when running Big Sur. I upgraded to Monterey and I'm experiencing intermittent network drops.

Others in my family are connected to the same mesh and fiber modem and do not experience issues.

It's definitely isolated to my Macbook. A reboot fixes it. Disabling/enabling wifi and other tinkering with it doesn't resolve it.

Are others experiencing this problem? Is there a definitive way to trouble shoot this problem as a reboot is not acceptable or timely resolution. :)

MacBook Pro 13″, macOS 10.15

Posted on Dec 12, 2021 8:47 AM

Top-ranking reply

Pugsly667

Level 1

0 points

Posted on Jan 20, 2022 9:42 PM

Exactly the same problem here. I've ruled out google wifi (colleagues with the same problem that don't use google wifi) and I've identified CiscoAnyconnect as the culprit. It's doing something weird with mDNS.

To see the problem manifest, run the following command in a terminal "netstat -an | wc -l" - this lists out (more or less) the number of open network connections your computer has. I've noticed that day on day this number grows to a number around 300,000 at which point the network dies - exhausted ports would be my guess. The only thing I can do at that point is reboot.

Now, why do I think it's Anyconnect? I uninstalled Anyconnect (and rebooted) - the problem went away - lines the command I provided above sits around 800. Installed Anyconnect - problem came back, uninstalled (and rebooted) and the problem went away.

Now.. the big question is - is it a problem for Cisco or Apple to fix?

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Similar questions

40 replies

Jan 18, 2022 7:35 PM in response to szilagyi97

I (2019 MacBook Air Retina ) have the same frustrating issue. I had zero wifi, ethernet, or hotspot drops prior to updating to Monterey. Now with Monterey it happens VERY frequently. I am unable to stay connected to the internet but for short periods, then it drops and fails to reconnect, which in my line of work as a psychologist during COVID is unacceptable. I have zero internet, modem, or router issues, and every other devices, (two other MacBook Airs, iPad, three iPhones, three smart TVs) are running fine. Does anyone have a fix?

Jan 19, 2022 4:04 PM in response to Julianwan

Hi Julianwan. It seems like a different issue - it’s not speed that is my problem but complete loss of connectivity - but I tried it anyway. It did not help unfortunately. Thanks for the suggestion though!

gcadmes

Level 1

8 points

Feb 2, 2022 6:13 AM in response to szilagyi97

Sorry I'm late to the party, but YES, I am seeing this too with only one out of 3 of my development macbook pros.

I just upgraded to 12.2 to see if that resolves the issue, and now I cannot connect to the VPN using Cisco AnyConnect version 4.10

szilagyi97 Author

Level 1

9 points

Dec 17, 2021 9:01 AM in response to mauro_volpi

My company also uses Cisco AnyConnect and I have the same drivers installed and activated.

Jan 2, 2022 2:12 PM in response to szilagyi97

What makes us think this has anything to do with Cisco? I have the same problem and also have Cisco Anyconnect, but I have no evidence it is related to the problem.

Jan 19, 2022 1:10 PM in response to FlyingTacos

This seems promising, but I'm not sure about the "long periods of use."

Mar 14, 2022 11:20 AM in response to Owl-53

Actually, just realized 12.3 just came out. Updating now, will report back...

Owl-53

Level 10

102,553 points

Mar 14, 2022 1:27 PM in response to jeffrey33

Yes please do keep us posted - time permitting - on the progress

Mar 28, 2022 9:59 AM in response to jeffrey33

Still need to reboot periodically. :(

Mar 28, 2022 2:46 PM in response to Owl-53

Looks just like your screenshot

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macOS Monterey 12.0.1 and intermittent network connectivity