![]() This is a known issue with Broadcom NetXtreme 1-gigabit network adapters that use the b57nd60a.sys driver when VMQ is enabled on the network adapter. Restarting the server immediately resolves network connectivity to all the virtual machines. These symptoms may occur on some or all virtual machines on the server that is running Hyper-V. You cannot ping or connect to a virtual machine from a remote computer.Restarting the virtual machine does not resolve the issue. ![]() However, you cannot ping or access network resources from the virtual machine. The network adapter seems to be working in the virtual machine. Virtual machines may randomly lose network connectivity.When you have Hyper-V running on Microsoft Windows Server 2012 or Windows Server 2012 R2 together with Broadcom NetXtreme 1-gigabit network adapters (but not NetXtreme II network adapters), you may notice one or more of the following symptoms: Microsoft posted a KB article for when virtual machines lose network connectivity when you use Broadcom NetXtreme 1-gigabit network adapters on Windows Server 2012 Hyper-V or Windows Server 2012 R2 Hyper-V. If you’re affected by this issue then you should have read this post.
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