Virtual eXtensible LAN (VXLAN) is a network virtualization technology that uses a VLAN-like encapsulation technique to encapsulate OSI layer 2 Ethernet frames within layer 4 UDP datagrams, using 4789 as the default IANA-assigned destination UDP port …

Virtual eXtensible Local Area Network (VXLAN) is a tunneling protocol that tunnels Ethernet (layer 2) traffic over an IP (layer 3) network. Traditional layer 2 networks have issues because of three main reasons: Spanning tree. Limited amount of VLANs. Large MAC address tables. Spanning tree blocks any redundant links to avoid loops.

VXLAN is the most commonly used protocol to create overlay networks enabling the use of a virtual network of switches, routers, firewalls & load balancers.

Nov 25, 2024 · VXLAN establishes a logical tunnel between the source and destination network devices, through which it uses MAC-in-UDP encapsulation for packets. Specifically, it encapsulates original Ethernet frames sent by a VM into UDP packets.

Why VXLAN was invented? To solve VLAN limitations in data centers and cloud, so it can provide scalability by allowing Layer2 encapsulated in UDP or so it extends VLAN. This is called MAC-in-UDP (UDP port 4789) encapsulation.

VXLAN is a solution to support a flexible, large-scale multitenant environment over a shared common physical infrastructure. The transport protocol over the physical data center network is IP plus UDP. VXLAN defines a MAC-in-UDP encapsulation scheme where the original Layer 2 frame has a VXLAN header added and is then placed in a UDP-IP packet.

Oct 15, 2024 · VXLAN allows organizations to scale their network infrastructure, improve flexibility, and support multitenant environments in ways that traditional VLANs simply cannot. This article delves deep...

Aug 17, 2022 · VXLANs are identified by a 24-bit VXLAN network identifier (VNI), enabling as many as 16 million VXLANs within a single administrative domain, compared with the 4,096 limit for VLANs. Learn how VXLAN technology works.

This document describes basic concepts and implementation of Virtual eXtensible Local Area Network (VXLAN), including the reasons why VXLAN is required, differences between VXLAN and VLAN, definitions of VTEP and VIN, VXLAN packet encapsulation, and …

Feb 27, 2024 · VXLAN is a tunneling protocol that is established between the source and destination network devices. It works by segmenting the Layer 2 ethernet frames and encapsulating them in UDP Packets (user datagram protocol).