About Virtual Extensible LAN (VXLAN) Tunnels
VXLAN is a simple tunneling mechanism that allows overlaying a Layer 2 (L2) network over a Layer 3 (L3) underlay with the use of any IP routing protocol. It uses MAC Address-in-User Datagram Protocol (MAC-in-UDP) encapsulation. A remote device, such as the Gigamon cloud or a customer-specific device, encapsulates the filtered traffic, adds an encapsulation header that consists of Layer 2 + IP + UDP + VXLAN headers. The encapsulated packet is sent out of the tool port, which is connected to the public network (the Internet). This packet is routed in the public network to reach the main office site. The packet is ingressed at the circuit port configured in the GigaVUE-H Series or GigaVUE-TA Series device at the main office. After validation of the source port, destination port, and VXLAN Network Identifier (VNI) of the packet, the VXLAN tunnel header will be removed and the inner payload will be sent to the tools based on the map rules configured.
Refer to the following sections for details about the VXLAN tunnel termination:
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