Built-in NIC teaming was one of my personally most anticipated features of Server 2012. NIC teaming, whether for redundancy or for more bandwidth, has always been a cool concept and one of the foundations of highly-available systems, but it has historically required 3rd party vendor software to enable. Probably the most popular example I can think of is the HP Network Configuration Utility software:
Almost every IT pro is going to be familiar with that screen. Up until now, to team network adapters, one had to use vendor software such as the HP software pictured above. But starting with Windows Server 2012, the ability is built right in to the operating system, bringing the feature to new sets of hardware and without the need for any 3rd party vendor drivers or software! (Also of note is that Microsoft supports their NIC teaming, whereas they do not support the HP Network Configuration Utility.)
You can use the graphical Server Manager to configure NIC teams, but you can also do it all right from within Powershell. And since I typically prefer to keep my servers in straight-up Server Core mode, I wanted to figure out how to do it all from Powershell. My test machine for this experiment is a SuperMicro SYS-5015A-H 1U. It has two embedded GbE adapters (Realtek based.) Before Server 2012, I always just kept one of the NICs disabled since I had no use for it, and no teaming software. But now, I've installed a fresh copy of Windows Server 2012 Standard edition on it.
To make a team out of these two network adapters, simply do
New-NetLbfoTeam -Name Team -TeamMembers Ethernet,"Ethernet 2"
That's it! (Just put quotes around 'Ethernet 2' because it contains a space.) Now keep in mind that you'll probably have to re-do the IP configuration for your new NIC team now, so you'll want physical or DRAC/ILO access to the machine so you can do that. (Or do it via script. I set the IP configuration on my new NIC team via sconfig.) Here is what the new team looks like in Powershell:
The TeamingMode and LoadBalancingAlgorithm default to SwitchIndependent and TransportPorts, respectively, but of course can be configured to whatever you want as you create the team with the New-NetLbfoTeam command. Check this Technet article for explanations on the different options and what they do. If you later want to add another NIC to the existing team, you can use the Add-NetLbfoTeamMember command and specify the NIC you want to add.