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vSwitch and LACP configuration

    Question

  • Hi

    want to ask about your experience or some advice how to correctly configure network in new hyper-v environment

    have two servers HP380 gen9 (WinServer2012R2), both with 2x4ports NIC's and connect them to stacked 2x Extreme 440G2

    configure NicTeam where every Nic is connected to both switches using LACP on server-side and network-side

    

    when i do tests - simply copy 10GB file between servers - have about 4Gbs as expected

    on next step configure virtalSwitch in HyperV with default settings using nicTeam

    after that speed between servers dramatically slowed down (1Gbs) and looking for reason why - is LACP configuration is not supported in virtual environment or something need to be reconfigure?


    Greetings

    Tomek

    Wednesday, March 29, 2017 10:56 AM

All replies

  • LACP means you have configured a 802.3ad port channel on your network switch?

    check if below articles makes more clarity

    https://blogs.technet.microsoft.com/keithmayer/2012/11/20/vlan-tricks-with-nics-teaming-hyper-v-in-windows-server-2012/

    https://ramazancan.wordpress.com/2011/08/06/how-to-configure-nic-teaming-with-hp-proliant-and-cisco-or-procurve-switch-infrastructure/

    the latter one is outdated from OS level but still very same apply on network side for LACP teaming

    hope this helps,

    Ramazan

    https://ramazancan.wordpress.com/


    Ramazan Can [MVP Cluster] http://ramazancan.wordpress.com/ ##This posting is provided "AS IS" with no warranties, and confers no rights##

    Wednesday, March 29, 2017 6:42 PM
  • Hi Sir,

    Please try to change "Load balancing mode" to "Address Hash" then try again.

     

    Best Regards,

    Elton


    Please remember to mark the replies as answers if they help.
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    Thursday, March 30, 2017 8:44 AM
    Moderator
  • after change to "Address hash" it's better but still less then 2Gb/s between servers
    Thursday, March 30, 2017 11:44 AM
  • Hi Sir,

    Could you please detail the bandwidth test ?

    Copy file from VM to VM ?

    If it is the case , I'd suggest you enable vRSS for NICs of each side VM .

    As for vRSS ,please check the following article:

    https://blog.workinghardinit.work/2013/07/31/virtual-receive-side-scaling-vrss-in-windows-server-2012-r2-hyper-v/

    Best Regards,

    Elton


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

    Friday, March 31, 2017 5:07 AM
    Moderator
  • thanks for answers

    no, copy file from host to host

    not tested between VM's, don't have any for now

    Kind Regards

    Tomek

    Friday, March 31, 2017 7:11 AM