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Both VLAN and VXLAN can belong to network virtualization technologies, which can achieve logical isolation of virtual networks in the physical network. Therefore, VLAN and VXLAN have many similarities but also some differences.
In real application scenarios, VLAN is mainly used for department isolation, broadcast control, security isolation, virtual machine isolation, multi-tenant environment, IP address management, load balancing and priority management, device isolation, etc. Relatively speaking, VLAN is flexible. Networks can be divided according to organizational needs to achieve isolation, security, performance optimization and other goals.
VXLAN is commonly used for data center interconnection, virtual machine migration, multi-tenant isolation, cross-physical network expansion, container networks, cloud computing environments, cross-cloud service provider interconnection, large-scale data centers, etc. VXLAN enables more flexible construction of virtual networks based on existing networks, and is suitable for a variety of complex network environments and application scenarios. It is of great significance in current applications in data centers and cloud environments.
The main differences between VLAN and VXLAN:
Scope and application
VLAN is mainly used for virtual network division within a local area network, while VXLAN is suitable for large-scale networks, data centers, and virtual network division across physical networks.
Marking method
VLAN uses 802.1Q tags to tag data frames, while VXLAN uses VNI to encapsulate and tag data packets.
Scalability
VXLAN is more scalable in terms of virtual network identifiers and supports a larger number of virtual networks.
Network layer
VLAN works at the data link layer, while VXLAN works at the network layer and uses IP tunnels.
In short, both VLAN and VXLAN can be used to virtualize network technologies, but VXLAN has greater advantages in scope and scalability, and is especially suitable for large-scale and cross-data center virtual network environments.
