This means that two ethernet cards are combined to form one physical device in order to increase bandwidth. Actually, it is a kernel mode driver that is used for Network Interface Bonding. Microsoft Adapter Multiplexor Protocol is a special set of configurations that comes into play when a user combines two different connections. Microsoft Network Adapter Multiplexor Protocol listed in the Wifi Properties What is the Microsoft Adapter Multiplexor Protocol? Actually enabling this protocol while the rest of the options in the list are enabled is not possible.
This option is disabled for many people by default and it often gets them confused if disabling or enabling it has an effect on their connection or bandwidth. If you are deploying any workload other than Hyper-V with guest clusters, enabling the NetFT Virtual Adapter Performance Filter will optimize and improve cluster performance.ĭue to changes in the networking stack in Windows Server 2016, the NetFT Virtual Adapter Performance Filter has been removed.The Microsoft Network Adapter Multiplexor Protocol is listed in the “ Items this connection uses” list for the Wifi Properties. More details can be found in this article: This can result in communication issues with the guest cluster in the VM. Issues have been seen where the NetFT Virtual Adapter Performance Filter in the host incorrectly routes NetFT traffic bound for a guest VM to the host. The filter is disabled because it can cause issues with Hyper-V clusters which have a Guest Cluster running in VMs running on top of them. The NetFT Virtual Adapter Performance Filter is disabled by default. When to Enable the NetFT Virtual Adapter Performance Filter This bypasses the physical NIC UDP / IP stack and delivers increased cluster network performance. The NetFT Virtual Adapter Performance Filter is a filter in Windows Server 2012 and Windows Server 2012 R2 which inspects traffic inbound on the physical NIC and then reroutes cluster traffic addressed for NetFT directly to the NetFT driver. Up the physical adapter, then to NetFT, and finally up to the Cluster Service. When the data is received by the other node, it follows the same flow. NetFT then sends the data over UDP down to the physical network card, which then sends it over the network to another node. When the Cluster Service communicates to another node in the cluster, it sends data down over TCP to the NetFT virtual adapter. The Microsoft Failover Cluster Virtual Adapter (NetFT) is a virtual adapter used by the Failover Clustering feature to build fault tolerant communication routes between nodes in a cluster for intra-cluster communication. In this blog I will discuss what the NetFT Virtual Adapter Performance Filter in Windows Server 2012 and Windows Server 2012 R2 is and the scenarios when you should or should not enable it.
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