Explore the key components involved in the encapsulation and decapsulation of traffic during host-to-host communication in VMware’s NSX-T Data Center. Learn about the role of Transport Nodes and VXLAN Tunnels in network virtualization.
Table of Contents
Question
A customer wants to know how NSX-T Data Center encapsulates and decapsulates traffic during host-to-host communication.
Which two components are required for the process? (Choose two.)
A. Tunnel Endpoint Protocol
B. Transport Nodes
C. L7 device
D. L2 access list
E. VXLAN tunnel
Answer
A. Tunnel Endpoint Protocol
E. VXLAN tunnel
Explanation
NSX-T Data Center uses VXLAN (Virtual Extensible LAN) as the overlay encapsulation protocol for host-to-host communication. The key components involved in the encapsulation and decapsulation process are:
- Tunnel Endpoint (TEP): This is the IP address assigned to the virtual tunnel endpoint on the host. It is responsible for encapsulating and decapsulating VXLAN packets.
- VXLAN tunnel: This is the logical overlay tunnel that carries the encapsulated traffic between hosts. The original Ethernet frame is encapsulated with a VXLAN header, which includes the Virtual Network Identifier (VNI) and other metadata.
When a host needs to communicate with another host, the source TEP encapsulates the original Ethernet frame with a VXLAN header, creating a VXLAN packet. This packet is then routed through the physical network to the destination TEP. At the destination, the TEP decapsulates the VXLAN packet, extracting the original Ethernet frame for delivery to the destination virtual machine or workload.
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