Hello,
I have upgraded my Mac to BigSur update and have VMware Fusion Pro 12.1.2 and have been having issues with bridged wifi on all my VMs. Lately I have been having issues downloading large files when using any VM. I get "Network Error" using Chrome, FireFox, IE, etc. I have also tried to downloading large files via command line on some of my linux boxes and it fails to download the file.
An example error I get when using curl via command line:
and no custom networking configs in place?
No custom networking configs. Basically tried from clean install as well. Changed wifi to bridged mode and verified IP address. I can download things like Google Chrome or Firefox just fine, however larger files like 2gb+ seems to throw a connection error. As an example I tried downloading Ubuntu from a windows vm and linux vm both errored out within the first 5 seconds of attempting download.
Using Wi-Fi for bridge mode has not worked in any release of Fusion 12. It would be nice to see this fixed. While I am ranting I think Fusion should be smart enough to pop up a box when started on an M1 Mac that states that it cannot run on an M1 Mac.
I came here to say I'm seeing the same thing. New mac the other day, using fusion for some win stuff. Could not get any downloads to work within the fusion instance of Win 10. Networking was on Wi-Fi, Autodetect seemed to do the same thing. Only thing that worked was manually selecting my USB LAN adapter.
Update, after continued research into the issue. I have found the following...
Downloaded Parallels, it has the exact same issue. So this is not just Fusion.
i did additional research and found some notes in Fusion about VPN issues.
This is a work system, so Cisco Anyconnect was installed within Mac OS, but I don't use it most of the time.
Notes on Cisco Anyconnect mention some notes about Big Sur, which got me to thinking and looking.
Even when not connected to my company VPN, there are still some Anyconnect items loaded into the network stack on the Mac.
I uninstalled Cisco Anyconnect from the Mac, rebooted.
Set the Fusion WIN10 instance to Bridge, Wifi, rebooted.
Issue seems to have gone away, I'm now able download files and access Internet resources without issue within my Fusion WIN10 VM, in bridged mode, using WiFi.
For me not fixed in 11.5.2. I had never installed AnyConnect on my current iMac - but lo and behold I had an /opt/cisco/anyconnect folder from a former employer that I am guessing the Migration Assistant moved from my old iMac. I cannot find any other AnyConnect components in my current system however?
I decided to get a bit more empirical about this problem. This is the ifconfig output when I am on Wi-Fi which shows 'MACNAT' is active:
en11: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
ether a2:5c:45:1c:41:74
media: autoselect
status: active
bridge100: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=3<RXCSUM,TXCSUM>
ether d2:81:7a:6d:1d:64
Configuration:
id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
ipfilter disabled flags 0x0
member: en1 flags=8003<LEARNING,DISCOVER,MACNAT>
ifmaxaddr 0 port 7 priority 0 path cost 0
member: en11 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 22 priority 0 path cost 0
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: active
Then here is the same out when I make Ethernet active and the guest network works properly, and there is no MACNAT
en11: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
ether a2:5c:45:1c:41:74
media: autoselect
status: active
bridge100: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=3<RXCSUM,TXCSUM>
ether d2:81:7a:6d:1d:64
Configuration:
id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
ipfilter disabled flags 0x0
member: en0 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 4 priority 0 path cost 0
member: en11 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 22 priority 0 path cost 0
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: active
So why does the Wi-Fi interface (en1) have the MACNAT flag? The MACNAT flag does not come up in Google either (I feel so special!) so at this point I have no idea what the next move is?
I am having the same problems, has anyone found a solution?
As am I. It seems that large packets are the issue- I get the disconnects when ssh-ing to a server and ask for a lot of data all at once. Just logging in, pressing enter... Those things work fine.
I am finding that setting the MTU to 1499 in the guest fixes it.
Yup- lowering the MTU fixed the symptoms.
Thanks that finally fixed my issues as well!
Everything works fine on my iMac on Ethernet. The problem is just in bridged mode on wifi which kind of precludes using VMs on a laptop.
I was finally able to get two VMs running on my laptop in bridged mode by limiting the MTU of the Linux guests to 1400.
Another thread discussing this in detail: https://communities.vmware.com/t5/VMware-Fusion-Discussions/Upgrading-to-MacOS-Big-Sur-broke-packet-...
Anyone tried Fusion in Monterrey yet?
Indeed I have. In Monterey 12.0.1 and 12.1 Linux VMs work normally when bridged to Wi-Fi. Windows VMs on the other hand cannot get a IP address when bridged to Wi-Fi. You win some and you lose some I guess...
My issue is very similar to the original poster. I purchased Parallels Desktop for Mac (Pro) in December 2020. At that time, it was v16.x, but it persists in v17.0.1. It has always had problems downloading files in Windows 10 through Firefox, Chrome, and Edge, as well as downloading Windows Updates, while in Bridged Network mode. I've tried the different virtual network interface types, and they all experience the same issue that the OP described - browser downloads start but finish with a network error. Windows Updates start downloading, and hang part way through and never finish.
As an example of files that I'm unable to download in Bridged mode, the file begins and immediately quits with a message that states "Couldn't download - network issue". If I switch to Shared Networking, downloads work great.
Current details (but this has happened with older versions of host OS, guest OS, and Parallels.
Host: MacOs 11.5.2
Guest: Windows 10 Pro, 20H2, OS Build 19042.1237
Hi,
@davidfincher wrote:
My issue is very similar to the original poster. I purchased Parallels Desktop for Mac (Pro) in December 2020.
A Parallels question at a VMware Forum, try the Parallels forum I guess?
--
Wil
My issue is very similar to the original poster. I purchased Parallels Desktop for Mac (Pro) in December 2020. At that time, it was v16.x, but it persists in v17.0.1. It has always had problems downloading files in Windows 10 through Firefox, Chrome, and Edge, as well as downloading Windows Updates, while in Bridged Network mode. I've tried the different virtual network interface types, and they all experience the same issue that the OP described - browser downloads start but finish with a network error. Windows Updates start downloading, and hang part way through and never finish.
As an example of files that I'm unable to download in Bridged mode, the file begins and immediately quits with a message that states "Couldn't download - network issue". If I switch to Shared Networking, downloads work great.
Current details (but this has happened with older versions of host OS, guest OS, and Parallels.
Host: MacOs 11.5.2
Guest: Windows 10 Pro, 20H2, OS Build 19042.1237
Apple's WiFi interfaces are problematic and so far there is no workarounds other than what has been discussed above. It seems any other network interface Ethernet or USB does not have this problem. I am assuming this has been unsolvable for you because you are on a MacBook. A USB or Thunderbolt to Ethernet dongle may be the right answer but I do not have a MacBook to try it with.