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---
layout: docs
page_title: Known Issues - VMware Provider
description: |-
This page tracks some known issues or limitations of the VMware provider.
Note that none of these are generally blockers to using the provider, but
are good to know.
---
# Known Issues
This page tracks some known issues or limitations of the VMware provider.
Note that none of these are generally blockers to using the provider, but
are good to know.
## Network disconnect
When Vagrant applies port forwarding rules while bring up a guest instance,
other running VMware VMs may experience a loss of network connectivity. The
cause of this connectivity issue is the restarting of the VMware NAT service
to apply new port forwarding rules. Since new rules cannot be applied to the
NAT service while it is running, it is required to restart the service, which
results in the loss of connectivity.
## Forwarded Ports Failing in Workstation on Windows
VMware Workstation has a bug on Windows where forwarded ports do not work
properly. Vagrant actually works around this bug and makes them work. However,
if you run the virtual network editor on Windows, the forwarded ports will
suddenly stop working.
In this case, run `vagrant reload` and things will begin working again.
This issue has been reported to VMware, but a fix has not been released yet.
## Big Sur Related Issues
### Creating Network Devices
Starting with the Big Sur release VMware Fusion is no longer able to create
network devices with custom subnet and mask settings to attach to guests. This
means custom IP addresses are not valid when creating a private network. When
creating a private network device to attach to a guest, simply define it with
no options:
```ruby
Vagrant.configure("2") do |config|
config.vm.box = "hashicorp/bionic64"
config.vm.network :private_network
end
```
### Port Forwarding
VMware Fusion currently does not support port forwarding to the localhost. To
work around this issue, the vagrant-vmware-utility provides functionality to
simulate port forwarding behavior available within VMware Fusion prior to
Big Sur. The port forward management is contained to the vagrant-vmware-utility
and is not accessible via the VMware Fusion networking UI.
### DHCP Reservations
Due VMware Fusion no longer utilizing its own service for DHCP, defining DHCP
reservations is currently not working with VMware Fusion on Big Sur.