Service Manual

Dell 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 configure, the Dell
Networking OS may automatically update its configuration, provide provisioning for configuration changes, or require system administrator
intervention.
Hypervisor Modes
There are two modes for retrieving configuration information from a hypervisor on a virtual server: check and config.
• Check — VSN retrieves configuration information from a hypervisor and notifies the system administrator when there is a change in
the network configuration; for example, when you add or remove a VLAN. A system administrator must make manual updates to the
Dell Networking OS configuration.
• Config — VSN retrieves configuration information from a hypervisor and automatically makes the required configuration changes in
the Dell Networking OS on the switch.
VSN Persistency
VSN installation and configuration are persistent in the Dell Networking OS configuration and remains after a system reload.
However, the configuration information a hypervisor retrieves is not persistent. If the system reloads, when it boots up, the VSN
application retrieves the network configuration of virtual servers again and reconfigures the Dell Networking OS accordingly.
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Virtual Server Networking