Concept Guide

Dell EMC Networking OS supports up to eight hypervisor sessions. A hypervisor session can consist of a single hypervisor unit (ESX, ESXi,
XenServer) or a centralized hypervisor (vCenter, Xenpool). To manage a single VMware hypervisor, use a vSphere client. A vCenter server
is a centralized management server for managing multiple VMware hypervisors.
Figure 2. Virtual Server Networking Example
For any change, VSN subscribes use hypervisor to notify the switch. Depending on the hypervisor mode you congure, the Dell EMC
Networking OS may automatically update its conguration, provide provisioning for conguration changes, or require system administrator
intervention.
Hypervisor Modes
There are two modes for retrieving conguration information from a hypervisor on a virtual server: check and cong.
• Check — VSN retrieves conguration information from a hypervisor and noties the system administrator when there is a change in
the network conguration; for example, when you add or remove a VLAN. A system administrator must make manual updates to the
Dell EMC Networking OS conguration.
• Cong — VSN retrieves conguration information from a hypervisor and automatically makes the required conguration changes in the
Dell EMC Networking OS on the switch.
VSN Persistency
VSN installation and conguration are persistent in the Dell EMC Networking OS conguration and remains after a system reload.
However, the conguration information a hypervisor retrieves is not persistent. If the system reloads, when it boots up, the VSN application
retrieves the network conguration of virtual servers again and recongures the Dell EMC Networking OS accordingly.
Virtual Server Networking
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