Cisco Nexus 1000V Deployment Manual page 9

Figure 4.
A Logical Switch template definition contains the information shown in Figure 5.
Figure 5.
Uplink profiles and port classifications are explained in the next sections of this document.
Note:
The Cisco Nexus 1000V is used as a forwarding extension.
Note:
that is, creation of more than one VEM per Microsoft Hyper-V host is not supported.
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Logical Switch Created on Microsoft SCVMM and Instantiated on Microsoft Hyper-V Hosts
Logical Switch Defines a Set of Uplink Profiles and Port Classifications
When a Cisco Nexus 1000V Logical Switch is created on Microsoft SCVMM, only one extension is used.
In this release, only one Cisco Nexus 1000V Logical Switch can be created per Microsoft Hyper-V host:
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