Dell EMC VxBlock 240 Administration Manual page 36

The server (Server 7) in this example is connected to port Eth1/7 on both Cisco Nexus 5548UP switches,
as shown in the following illustration. Your configuration may be different.
On Cisco Nexus 5548UP Switches A and B, enter the following commands:
Procedure
1 Enable the auto-creation of the Cisco Nexus 5548UP Switches vEthernet interfaces:
vethernet auto-create
Managing compute resources | 36