Frequent Disconnects from Clients to a Hyper-V 2012 R2 Server

Working with a new Dell PowerEdge R420 server running Server 2012 R2 Standard. The hardware is hosting a Hyper-V client also running Server 2012 R2 Standard which is sharing several SCSI controller VHDX drives. Frequently clients using MS Access 2013 running mdbx databases get disconnected with errors that connection to the database were lost. No network errors are logged on the client, host server or VM. Network adapter is Broadcom Gigabit Ethernet BCM5720, with the Virtual Switch using a dedicated physical NIC port. Virtual machine queue is disabled on the host NIC and within Hyper-V. Right now no other virtual machines are running on this machine due to instability. Worked with Dell ProSupport to no avail and all drivers/firmware are updated. Any help or insight would be greatly appreciated!
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GISCOOBYDirector of Information TechnologyAsked:
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Jeffery HayesSystem Support Technician Commented:
Are you able to do the following?

From the host that clients are using pull a Netmon log?

Also not sure but this might help.

https://communities.vmware.com/message/2113666
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2035701 

Even though it's VMware and not Hyper V. Could be the Nic however. But are other systems in the environment the same and working fine?

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Cliff GaliherCommented:
The current Broadcom drivers are broken (again.) And honestly I've quit trying to track what past versions are stable.  Buy a non-Broadcom NIC (I recommend Intel) and save yourself repetitive pain . Not just now, but down the road during driver update cycles
GISCOOBYDirector of Information TechnologyAuthor Commented:
Thanks for both of your help! Jeffery Hayes: pointed me in the right direction with the ESX site even though this is a Hyper-V environment and Cliff Galiher then confirmed the suspicions. I will add an Intel NIC. Thanks again.
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