I run OS X Yosemite and have the latest versions of Parallels and VMWare Fusion. I had been running a Win7x64 Parallels VM happily for a while, until it started to lose stability. I created a new one, and had similar issues. Decided to try VMWare again. Created a new VM there, got it set up, and everything is great except one thing.
On Parallels, I could connect to my client's Cisco AnyConnect VPN and still maintain connection to the internet (needed especially for pushing code to github, while on the VPN) but on VMWare this doesn't work. I checked all versions, settings, etc. for AnyConnect and they are identical. Both are using NAT/Shared network configuration. I then did an ipconfig /all on both VMs to compare.
On both VMs, the "Cisco AnyConnect Secure Mobility Client Virtual Miniport Adapter for Windows x64" shows up, and are basically identical aside from IPV6 address, and IPv4 Address are one digit apart, obviously not the same.
However, in Parallels the "Intel(R) PRO/1000 MT Network Connection" Ethernet Adapter the IPv4 Address, Default Gateway, DHCP and DNS Servers have ALL updated to point to VPN Network servers, where as on VMWare they remain pointing to my local NAT IPs. I am assuming this is the issue, but I certainly could be missing something.