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Virtual extensible local area network (VXLAN) is a tunnel encapsulation technology for large layer 2 network expansion overe NOV3 that uses MAC-in-UDP encapsulation. VXLAN uses a 24-bit network segment ID, called VXLAN network identifier (VNI), to identify users. This VNI is similar to a VLAN ID and supports a maximum of 16M [(2^24 - 1)/1024^2] VXLAN segments. VXLAN uses MAC-in-UDP encapsulation to extend Layer 2 networks to ensure uninterrupted services during VM migration, the IP address of the VM must remain unchanged.

VXLAN uses VTEP (VXLAN Tunnel Endpoint) equipment to encapsulate and decapsulate VXLAN packets, including ARP request packets and normal VXLAN data packets. VETP encapsulates the original Ethernet frame through VXLAN and sends it to the peer VTEP device. The peer VETP device decapsulates the VXLAN packet after receiving it, and then forwards it according to the original MAC. The VTEP can be a physical switch, a physical server, or other VXLAN-enabled Hardware equipment or software.

Creating VXLAN Static Tunnel

To creating VXLAN static tunnel, take the following steps:

  1. Click Network > VPN > VXLAN.
  2. Click New
  3. Click OK.