Lemonde
  • Lemonde
  • Advanced Member Topic Starter
a year ago
All VM machines on hyper-v host dropping every other ping

system slow on 2012 R2 Hyper-V over dual fibre LACP Intel 10G 2P X520 NIC

Seeing the following two every second:

Log Name: System

Source: Microsoft-Windows-MsLbfoSysEvtProvider

Date: 01/10/2020 18:34:40

Event ID: 16945

Task Category: None

Level: Warning

Keywords: Classic

User: N/A

Computer: server.domain.local

Description:

MAC conflict: A port on the virtual switch has the same MAC as one of the underlying team members on Team Nic Microsoft Network Adapter Multiplexor Driver #2

Event Xml:

16945

0

3

0

0

0x80000000000000

150148

System

server.domain.local

Microsoft Network Adapter Multiplexor Driver #2

Log Name: System

Source: Microsoft-Windows-MsLbfoSysEvtProvider

Date: 01/10/2020 18:34:41

Event ID: 16949

Task Category: None

Level: Warning

Keywords: Classic

User: N/A

Computer: server.domain.local

Description:

Member Nic {36bc0193-ef3f-4e2d-baad-a6ade2abc522} Disconnected.

Event Xml:

16949

0

3

0

0

0x80000000000000

150149

System

server.domain.local

{36bc0193-ef3f-4e2d-baad-a6ade2abc522}

Have gone back to an unteamed copper cable in the meantime...


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kateawaits
a year ago
Have you checked the settings on the switch? We had this issue on fibre cards teamed to a DrayTek switch on LACP and we had to set the ports timeout settings to be short before they worked properly or reliably.

The duplication of ARP settings is part of the way that the hyper-v server routes the traffic through it's own card and into the VM just like you have to set with some firewalls, such as the old Checkpoint systems.