Owner's Manual

Virtual Server Networking | 97
VSN subscribes to hypervisor for any change to be notified to switch. Depending on
the hypervisor mode configured, 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: VSN retrieves configuration information from a hypervisor and notifies
the system administrator when there is a change in the network configuration; for
example, when a VLAN is added or removed. 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 Dell Networking OS
on the switch.
VSN Persistency
VSN installation and configuration is persistent in the Dell Networking OS
configuration and remains after a system reload. However, the configuration
information retrieved through a hypervisor is not persistent. If the system reloads,
when it boots up the VSN application will retrieve the network configuration of
virtual servers again and reconfigure Dell Networking OS accordingly.
VLAN configuration
Management VLAN
The management interface between a switch and a hypervisor can be a single port or
VLAN interface. If the connection with a hypervisor is through a VLAN, you must
manually configure the VLAN interface on the switch before VSN can establish a
connection with the hypervisor and retrieve information from it about virtual-server
configuration.
A hypervisor's management interface can also be a data interface, which means both
management traffic and data traffic can use the same interface.
Manually configured VLANs are not removed by VSN after application or
configuration changes are made in Dell Networking OS on a switch.