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Windows server 2012 network bridge could not be used for Hyper-V network switch. Worked in 2008R2. RRS feed

  • Question

  • The problem is: MAC bridge miniport didn't displayed in configure external network menu in Hyper-V manager-> Virtual switch manager.

    I am using windows server 2012 RTM with latest updates.

    Prerequisites: Hyper-v installed, 2 nics 1GB each drivers installed.

    1. Going to network and sharing center  -> adapter settigs -> selecting 2 nic's -> create Bridge. MAC Bridge adapter appears.

    2. Going to Hyper-V manager -> virtual switch manager -> new virtual network switch -> create -> select external network type .... In dropdown list there are no MAC bridge miniport! Only old adapters, that already used by bridge. Trying to use they return an error.

    In windows server 2008 R2 same way i get 2 nic's bridge and virtual machines and physical server working fine.

    Any ideas how to solve it?

    Try to do some (crazy) experiments:

    1. Try to add to bridge virtual network adapter. (bridge->properties->set additional checkbox on virtual adapter). Asked to reboot. After this, bridge disappeared at all, all checkboxes in protocols (adapter->properties) on all afflicted network adapters cleared.

    • Edited by Novsinclair Wednesday, November 28, 2012 5:41 AM
    Wednesday, November 28, 2012 3:51 AM

Answers

  • I need a bridge, and that functionality worked for 2008R2 but does not worked for 2012. I do not need fault tolerance, failover etc.

    I am interesting why this is not worked.

    I need to bridge 2 gigabit networks as my server will be simply switch, allowing me to connect virtual machines to that network also.

    I get a workaround for this ussue but have not test performance by now.

    First, create internal network in virtual switch manager. This wil be used for virtual machines. New virtual adapter appears in network and sharing center  -> adapter settings.

    Second, network and sharing center  -> adapter settings -> selecting 3 nic's (that internal and 2 physical NICs) -> create Bridge. MAC Bridge adapter appears. Adding IP settings - > VIOLA! It works!

    But why the way to get it work is so strange?


    • Edited by Novsinclair Monday, December 10, 2012 7:30 AM found how to get it work
    • Marked as answer by Novsinclair Monday, December 10, 2012 7:30 AM
    Monday, December 10, 2012 7:01 AM

All replies

  • Hi,

    I’m wondering why create Network Bridge for these two physical NICs?

    I think you may create NIC Teaming, NIC Teaming, also known as load balancing and failover (LBFO), allows multiple network adapters on a computer to be placed into a team for the following purposes:

    •  Bandwidth aggregation
    • Traffic failover to prevent connectivity loss in the event of a network component failure

    NIC Teaming requires the presence of a single Ethernet network adapter, which can be used for separation of traffic using VLANs. All modes that provide fault protection through failover require at least two Ethernet network adapters. The Windows Server 2012 implementation supports up to 32 NICs in a team.

    For more information please refer to following MS articles:

    NIC Teaming Overview
    http://technet.microsoft.com/en-us/library/hh831648.aspx
    NIC Teaming in Windows Server 2012
    http://blogs.technet.com/b/privatecloud/archive/2012/06/19/nic-teaming-in-windows-server-2012-brings-simple-affordable-traffic-reliability-and-load-balancing-to-your-cloud-workloads.aspx
    http://blogs.technet.com/b/dcaro/archive/2012/07/09/windows-server-2012-network-teaming.aspx


    Lawrence

    TechNet Community Support

    Thursday, November 29, 2012 7:34 AM
    Moderator
  • I need a bridge, and that functionality worked for 2008R2 but does not worked for 2012. I do not need fault tolerance, failover etc.

    I am interesting why this is not worked.

    I need to bridge 2 gigabit networks as my server will be simply switch, allowing me to connect virtual machines to that network also.

    I get a workaround for this ussue but have not test performance by now.

    First, create internal network in virtual switch manager. This wil be used for virtual machines. New virtual adapter appears in network and sharing center  -> adapter settings.

    Second, network and sharing center  -> adapter settings -> selecting 3 nic's (that internal and 2 physical NICs) -> create Bridge. MAC Bridge adapter appears. Adding IP settings - > VIOLA! It works!

    But why the way to get it work is so strange?


    • Edited by Novsinclair Monday, December 10, 2012 7:30 AM found how to get it work
    • Marked as answer by Novsinclair Monday, December 10, 2012 7:30 AM
    Monday, December 10, 2012 7:01 AM
  • Probably your switch doesn't support.
    Tuesday, September 25, 2018 9:57 AM