NIC teaming is a new feature of Windows Server 2012, which allows multiple network adapters to be placed into a team for the purpose of providing network fault tolerance and continuous availability. When one of the network adapters fail, the other one takes over without requiring third-party hardware or software. Windows Server 2012 NIC teaming is supported by any vendor’s network card but both are recommended to be identical, in terms of speed and vendor.
Windows Server 2012 supports NIC Teaming up to 32 Network Cards. Hyper-V supports only two.
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Here we will configure NIC teaming for Hyper-V virtual machine. In the following steps, we will create, configure and add NIC teaming to a Hyper-V virtual machine.
1. Open Server Manager, click on All Servers or Hyper-V on the left-hand side pane, then right-click on the server, HOST1 to enable NIC teaming and select Configure NIC Teaming.
2. In the
NIC Teaming dialog-box, click on
TASKS and click
New Team.

3. In the New team dialog-box, In
Team name: type
Corporate External Team as the Team name and under Member adapters
select the network adapter to
add to the NIC teaming. Under Additional properties,
select the
Teaming mode: Switch Independent,
Load balancing mode: Hyper-V Port,
Standby adapter: None (all adapters Active),
Primary team interface: Corporate External Team: Default VLAN and then Click
OK.
4. For the few seconds, we get
Fault Status in NIC Teaming dialog-box and then get
Online Status.
5. Under
ADAPTERS AND INTERFACES, Click
Team Interfaces Tab,
Right-Click on Team Interface name,
Corporate External Team and Click
Properties.

6. In the
Network Adapter Properties dialog box, under
General information, noted
Description:
Microsoft Network Adapter Multiplexor Driver. Verify
Default VLAN membership and Click
OK.
7. In the Network Control Panel, verify
Microsoft Network Adapter Multiplexor Protocol under
Team Network Properties.
8. In
Hyper-V Manager, on the
Action pane, click
Virtual Switch Manager. In the Virtual Switch Manager dialog box, select
New virtual network switch, Ensure that
External is selected and Click on
Create Virtual Switch. Under
External network select
Microsoft Network Adapter Multiplexor Driver then Click
Apply, review the warning, and then click
Yes.
9. Open the
Settings of Hyper-V virtual machine, click
Network Adapter on the left pane, and select
Corporate Network under Virtual switch. Then Click
Advanced Features on left pane, then Click on
Enable this network adapter to be part of a team in the guest operating system under
NIC Teaming, Click
Apply and Click
OK.
10.To
verify NIC Teaming,
Unplug Network Cable one of the
NIC and
PING the
Destination Server. We will get
Reply from the Destination Server.
Summary:
Network Fault tolerance is often overlooked. In High Availability Systems, this feature can be of great utility as the downtime is zero in terms of Network connectivity due to NIC failure.
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