Class 17 VMware vSphere Distributed Switch Introduction
A VMware vSphere Distributed Switch (VDS) is a centralized, logical virtual switch that provides a single pane of glass for managing networking across all ESXi hosts in a data center. Unlike standard virtual switches (vSwitches) that are host-specific, VDS is a data center object, allowing for unified configuration, monitoring, and management of virtual networks.
Here's a more detailed look:
Key Features and Benefits:
Centralized Management:
VDS allows for a single point of configuration, monitoring, and management for virtual networks across the entire data center.
Consistent Network Configuration:
Changes made to a VDS are automatically propagated to all associated ESXi hosts, ensuring consistent network configuration across the environment.
Simplified Provisioning and Management:
VDS simplifies the process of provisioning and managing virtual networks, reducing operational overhead and complexity.
Enhanced Flexibility:
VDS supports advanced networking features like NetFlow, Port Mirroring, and SNMP, enabling the use of familiar network troubleshooting and monitoring tools.
Supports Software-Defined Networking (SDN):
VDS helps realize SDN by providing centralized provisioning, administration, and monitoring of virtual networks.
Scalability:
VDS can be used in large-scale virtualized environments, providing a scalable and manageable solution for virtual networking.
How it Works:
A VDS is configured on vCenter Server and applied to all ESXi hosts associated with it.
It acts as a single logical switch across all these hosts, providing network connectivity to virtual machines.
VMs can migrate between ESXi hosts while maintaining consistent network connectivity because they are connected to the same distributed port group, according to a VMware article.
The distributed port groups (dvPort groups) within the VDS define the network configuration for VMs and other network interfaces.
In essence, VDS provides a more streamlined and efficient way to manage virtual networks compared to standard vSwitches, especially in large-scale virtual environments.