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

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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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40 replies

Dec 13, 2021 8:19 AM in response to szilagyi97

Hey there szilagyi97,

Thanks for reaching out to Apple Support Communities. It sounds like you’ve done a good job isolating the issue. The following articles provide some great guidance on ways to resolve this:

Solve internet connection problems on Mac

If you can’t connect to a Wi-Fi network on Mac

Troubleshoot connecting your Mac to the internet

We hope this helps. Take care.

Dec 16, 2021 12:37 PM in response to szilagyi97

Hey szilagyi97,

If those steps didn’t help with the issue you’re having, go through the following links to help you check for any sources of interference and make sure the router is set up correctly to work with your Mac:

Resolve Wi-Fi and Bluetooth issues caused by wireless interference

Regards.

Mar 14, 2022 12:15 PM in response to jeffrey33

I have not had Cisco/ network disconnect issues since Monterey 12.2.1. I did also uninstall and reinstall Cisco Anyconnect. They may have also updated. Either way. Mine appears to be fixed - finally!

Owl-53

Level 10

102,415 points

Mar 28, 2022 1:26 PM in response to jeffrey33

Has AnyConnect added some Proxies to your network Setting

Dec 19, 2021 7:07 AM in response to szilagyi97

Hey szilagyi97,

You may want to reach out to Cisco customer service and see if they have any info they can provide on this. You can also reach out to Apple Support at this link so they can dig a little deeper as well:

Contact Apple Support

Take care.

Dec 23, 2021 9:19 AM in response to szilagyi97

Same issue here. Not sure what's relevant, but:

google mesh wifi
Work laptop that disconnects frequently: macbook pro 2020 13" running Monterey 12.1 with Cisco AnyConnect 4.10.00093
All my other WiFi devices seem to have no problem including other macs running Monterey

When my work laptop disconnects, it sometimes resolves itself after 3-5 minutes. Turning WiFi on and off a few times on the laptop sometimes works. Reboot always works. Super annoying. I was also suspecting the problems started around the time I upgraded to Monterey. Does seem like a Cisco-Monterey thing.

fracape

Level 1

8 points

Jan 11, 2022 11:33 AM in response to David Carlin

Same here. Seems I need to disconnect the cisco socket filter first (as shown in mauro_volpi's screenshot) before re-enabling wifi. I believe I could speedup the "re-connection" by assigning a fixed IP to my laptop. Tried to "prioritize" the laptop in Google Home app but it does not seem to help.

Mar 28, 2022 11:10 AM in response to VikingOSX

I've updated everything and still have issues. Seems to be related to AnyConnect as everything seems to go downhill after I disconnect VPN and issues started after I installed. And I can't seem to resolve it without a reboot.

Mar 14, 2022 9:21 AM in response to szilagyi97

I have same issue with Montery 12.2.1 and AnyConnect 4.10.01075. After disconnecting from VPN network connectivity is severely impaired requiring a reboot.

szilagyi97 Author

Level 1

9 points

Dec 16, 2021 8:27 AM in response to barberlives123

No, this was not helpful. These are all basic troubleshooting techniques for resolving problems outside the OS - those are already done. How do you trouble shoot an issue with Monterrey? Are there any *known* issues reported that are acknowledged and actively being worked on?

szilagyi97 Author

Level 1

9 points

Dec 17, 2021 5:56 AM in response to barberlives123

I don't know how to ask this more clearly but let me try another way. I have 5 macbooks (all running Big Sur) and 5 iphones in my home. All of them are working perfectly and not experiencing any network or wifi issues with my Google Nest wifi mesh network and fiber cable modem.

I updated *ONE* macbook to Monterey 12.0.1 and that *ONE* macbook is having intermittent issues staying connected. The remaining 4 macbooks and 5 iphones are operating fine even when the single Monterey macbook is intermittently disconnecting.

There is nothing wrong with my router, my wifi network or my internet provider. I was hoping someone could reference a known issue with Monterey and tell me a fix is on the way. Please do not post anymore suggestions on how to troubleshoot basic wifi connection.

Do I need to open a case with Apple to get support?

Dec 17, 2021 6:40 AM in response to szilagyi97

Hi guys,

I have the SAME EXACTLY problem and behavior in my house.

The only difference is that there is another MacBook on my house that was upgraded to Monterey and is working fine.

My company uses Cisco AnyConect as VPN and no matter if I'm using it or not, there are some "drivers" on the "Network Preferences" screen. Please find the screen shot attached. Not sure if there is any interference there.

It is really annoying this behaviors, specially now we are working from home.

biren128

Level 1

8 points

Jan 4, 2022 3:00 PM in response to szilagyi97

I have exactly same issue as described by the original post. I have similar setup - MacOS Monterey + Google Wifi Mesh and Cisco AnyConnect VPN.

The issue only started happening after upgrading to MacOS Monterey. Given that so many others are reporting the same issue, how do we build more visibility to get Cisco and Apple to investigate this.

Jan 14, 2022 9:23 AM in response to bobmeister9

At home we have 2 Monterrey laptops and Google Mesh Network. The one with AC has the reported problem, the other one used by my son, w/o AC, no problems at all.

But also I stay way more time connected to the network, not sure if it is relevant also or not.

Jan 18, 2022 12:07 PM in response to 2geoph

Hi @2geoph - unfortunately that’s a different issue than what I think most of us have. I’m already using DHCP and net connectivity craps out without fail every day.

I think I will start rebooting every day before I start work and see if that prevents the network drop from happening in the middle of conference calls

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macOS Monterey 12.0.1 and intermittent network connectivity