I have a Hyper V host on windows server 2012 and a guest virtual machine also Windows server 2012.
I have two NICs..one is assigned to the guest and the other the host.
DNS is fine and external network access is fine from both the host and the guest.
I can FTP from the guest virtual machine to a remote machine at 10mb/sec plus.
I can FTP from the host machine to a remote machine at 10MB/sec.
What I cant do is transfer anything from the guest to host or vice versa, using either FTP or a simple network share at anything over 2mb/sec and its very variable and the speed jumps around all over the place.
I have broadcom NetExtreme II NICs 5716C and I have tried changing the adaptor settings; Virtual Machine Queues enabled/disabled
which had no effect, even after a reboot.
All Hyper V settings are the defaults and the guest has a fixed size virtual HDD.
Anyone have any ideas about where else I can look for whats causing this..?