locked
Windows Server 2019 Hyper-V Guest on Windows Server 2019 Hyper-V Host RRS feed

 > 

  • Question

  • Question
    Sign in to vote
    0
    Sign in to vote

    Hi,

    Short version: Hyper-V role installed on Windows 2019 with gen2 Win 2019 VM. File share created on that Win 2019 VM. File open (200Mb) or copy from share with Win 10 client machine is realy slow.

    Please check detailed issue description: https://social.msdn.microsoft.com/Forums/en-US/3248a691-d32f-4ac6-9175-94524afc35ba/windows-server-2019-hyperv-guest-on-windows-server-2019-hyperv-host-networking-performance-error?forum=servervirtualization .  

    I guess we have posted it on the wrong place..


    Friday, March 1, 2019 10:54 AM

Answers

  • Question
    Sign in to vote
    1
    Sign in to vote

    Hi,

    Have set up test environment to try it. It was 100% repeatable. A have done a lot of testing and searching for solution..

    After a while i found folowing post: https://win10.guru/hyper-v-external-switches-killing-networking-in-insider-builds/ - i the coment section RSC is mentioned. That leaded to the next one about Receive Segment Coalescing (RSC) in the vSwitch: https://docs.microsoft.com/sl-si/windows-server/networking/technologies/hpn/rsc-in-the-vswitch?view=vsts

    Logical step was disabling RSC in the VM - That solved the problem. Application from shared folder opens normaly fast (as on Windows 2016 VM or Windows 10 1809 VM). 

    Best regards

    Marko

    • Marked as answer by marvil Monday, March 11, 2019 8:46 AM
    Monday, March 11, 2019 8:46 AM

All replies

  • Question
    Sign in to vote
    0
    Sign in to vote

    Hi,

    Thanks for posting in our forum!

    This is a quick note to let you know that I am currently performing research on this issue and will get back to you as soon as possible. I appreciate your patience.
    If you have any updates during this process, please feel free to let me know.

    Best Regards,

    Daniel

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Monday, March 4, 2019 9:54 AM
  • Question
    Sign in to vote
    1
    Sign in to vote

    Hi,

    Have set up test environment to try it. It was 100% repeatable. A have done a lot of testing and searching for solution..

    After a while i found folowing post: https://win10.guru/hyper-v-external-switches-killing-networking-in-insider-builds/ - i the coment section RSC is mentioned. That leaded to the next one about Receive Segment Coalescing (RSC) in the vSwitch: https://docs.microsoft.com/sl-si/windows-server/networking/technologies/hpn/rsc-in-the-vswitch?view=vsts

    Logical step was disabling RSC in the VM - That solved the problem. Application from shared folder opens normaly fast (as on Windows 2016 VM or Windows 10 1809 VM). 

    Best regards

    Marko

    • Marked as answer by marvil Monday, March 11, 2019 8:46 AM
    Monday, March 11, 2019 8:46 AM
  • Question
    Sign in to vote
    0
    Sign in to vote

    Hi,

    Thanks for your sharing!

     

    Best Regards,

    Daniel

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Monday, March 11, 2019 8:54 AM
  • Question
    Sign in to vote
    0
    Sign in to vote
    I had a similar issue with an Intel X722 NIC. But only with VMs, that are < 2019 (Host is a Server 2019).

    Disabling RSC on the vSwitch didn't fixed it.
    But after disabling RSC directly on the NIC (Recv Segment Coalescing) all works fine!

    Regards
    Patrick
    Monday, June 3, 2019 12:44 PM
  • Question
    Sign in to vote
    0
    Sign in to vote
    I had a similar issue with an Intel X722 NIC. But only with VMs, that are < 2019 (Host is a Server 2019).

    Disabling RSC on the vSwitch didn't fixed it.
    But after disabling RSC directly on the NIC (Recv Segment Coalescing) all works fine!

    Regards
    Patrick

    This seems to have worked for me. I should know in the a.m.

    Been struggling for a while with it. and even crystal disk manager could get me GB connection speed over the network with this done it seems to work. so waiting on users to let me know how it goes tommorow.

    Wednesday, July 3, 2019 2:38 PM
  • Question
    Sign in to vote
    0
    Sign in to vote

    Hi @JackB_ZA,

    Intel has published a new driver (Version 24.1) a few days ago.
    I haven't yet tested it. But this should/could also fix this issue.

    Regards
    Patrick

    Thursday, July 4, 2019 1:34 PM
  • Question
    Sign in to vote
    0
    Sign in to vote

    Dialing in here to just to give an update. There's another post on this as well.
    It's now october 2019, and we've just used the lastest HPe SPP pack to update drivers / firmwares on our Hyper-V hosts. Just out of curiosity I enabled RSC on our machines again, to verify whether or not it has been fixed by a driver update or so. But alas, enabling it immediately slows down the network to crawling speeds again.

    Our machines (both HPe Gen9 and Gen10) are running the built-in HPe 331i quad-port Gigabit, aka rebranded Broadcom NX1 adapters. We are running driver version 214.0.0.0, which is the latest driver from HPe, which is / should be supported for Server 2019.

    So be warned, it might just not work well on HPe machines on the internal NICs.


    Wednesday, October 16, 2019 9:30 AM