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Virtual Switches

A virtual switch provides the network attachment point for virtual machines. In eEVOS, virtual switches are managed through euroNAS SDN and are designed to support clustered operation.

Purpose of a virtual switch

Virtual machines connect their network interfaces to a virtual switch. The virtual switch provides the logical network connection used for communication with other virtual machines, services, and external networks.

Common switches

A common switch is a virtual switch intended to exist consistently across the relevant cluster nodes. This allows a virtual machine to move between nodes without requiring changes to its switch attachment.

Benefits of common switches

  • Consistent network attachment across nodes
  • Simpler migration workflows
  • Reduced risk of missing switch configuration on the target node
  • Predictable VM network behaviour in clustered environments

Virtual switch and virtual network

A virtual switch is the switching object used for VM connectivity. A virtual network is a higher-level administrative object used for organisation and management in the interface.

Cluster consistency

Maintaining consistent switch presence across relevant nodes is essential for reliable migration and failover. euroNAS SDN uses this model to keep VM network assignments stable throughout the cluster.

Current inventory and operations

The Virtual Switches page shows switch status, logical uplinks and bond members, connection state, VM usage, network-profile usage, and an ACL summary. Expand a switch to inspect individual nodes, ports, and member links.

Available operations include adding or removing ports, scanning for drift, reconciling supported drift, exporting or restoring the switch configuration, and applying, removing, analysing, or simulating ACL profiles.

When more than one uplink is selected on the same node, eEVOS creates an OVS bond. The current safe defaults are active-backup bond mode and LACP off. RSTP remains enabled by default. Register distributed switches in Cluster Network Manager when cluster-wide OVN policy or ACL functions are required.

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