Hyper-V Virtual Machine Remote Connection issue



  • Has anyone ran into an issue on a Hyper-V host when trying to connect to a vm it is running from Hyper-V Manager?

    This is a brand new Server 2012 R2 fully updated. The vm is also a 2012R2 server, fully updated with integration services installed. The host has two NIC's, one is dedicated to the host, and the other dedicated to the Virtual Network for the vm. When I try to connect to the vm from Hypver-V manager by right clicking the vm and selecting Connect, it initially connects fine and I can control the vm without issue, after about 10-15 seconds the screen blacks out and displays "Video remoting was disconnected unexpectedly" but then reconnects right away. However after it reconnects, I loose some mouse functionality.

    I have restarted the host many times
    Created a fresh new vm
    Re-installed Hyper-v role

    0_1479313987479_remote-view.PNG



  • You can't post when the image upload says 100%, it should not say that. You have to wait for it to go past 100% and finish processing the image and return the URL. The percentage is only the upload, not that the process is complete.



  • @scottalanmiller Sorry, I originally used the upload file, I didn't see the upload image next to it. I did not have permission to upload the file but the image worked ok. Thanks.



  • If you do a continuous ping to the VM host, does it ever loose packets?



  • @Dashrender No it does not. I have a constant ping running to it from the host, as well as a constant ping from within the vm to our gateway and neither drop any packets. Response time is usually 1ms.

    I can rdp into the guest and maintain a constant connection without any drops at all.



  • Can you update the Host VM server NIC driver?



  • @Dashrender I did update the NIC driver. It is a Dell Server with Broadcom NetXtreme Gigabit NICs. It originally shipped with a 16.0 driver version, I updated to 17.4 from Dell's site. Rebooted and still the issue is the same. I even read an article about the same issue and trying to disable TCP/UDP Checksum Offload in the NIC driver properties. The machine is currently not in production so I tried it, but it didn't make a difference. However I only did that on the NIC 2 that is dedicated to the virtual guest network not the host NIC.



  • @i3 said in Hyper-V Virtual Machine Remote Connection issue:

    @Dashrender I did update the NIC driver. It is a Dell Server with Broadcom NetXtreme Gigabit NICs. It originally shipped with a 16.0 driver version, I updated to 17.4 from Dell's site. Rebooted and still the issue is the same. I even read an article about the same issue and trying to disable TCP/UDP Checksum Offload in the NIC driver properties. The machine is currently not in production so I tried it, but it didn't make a difference. However I only did that on the NIC 2 that is dedicated to the virtual guest network not the host NIC.

    Have you disabled VMQ on the Host ?



  • @dafyre Also in the NIC driver properties? Yes, but only on the NIC 2 dedicated to the virtual guest network, not the host NIC.



  • @i3 I generally do a blanket ban on VMQ... It seems to kill my Hyper-V servers.



  • @i3 said in Hyper-V Virtual Machine Remote Connection issue:

    @Dashrender I did update the NIC driver. It is a Dell Server with Broadcom NetXtreme Gigabit NICs. It originally shipped with a 16.0 driver version, I updated to 17.4 from Dell's site.

    This seems to imply that the server came with an OS pre-installed. Is that right? This seems highly unusual for general best practices. If this is the case, perhaps a complete reinstall of the Host OS is in order?


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