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NE40E-M2 V800R010C10SPC500 Feature Description - LAN Access and MAN Access 01

This is NE40E-M2 V800R010C10SPC500 Feature Description - LAN Access and MAN Access
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Application for Communication Between Terminal Users on a VXLAN and Legacy Network

Application for Communication Between Terminal Users on a VXLAN and Legacy Network

Service Description

Currently, data centers are expanding on a large scale for enterprises and carriers, with increasing deployment of virtualization and cloud computing. In addition, to accommodate more services while reducing maintenance costs, data centers are employing large Layer 2 and virtualization technologies.

As server virtualization is implemented in the physical network infrastructure for data centers, VXLAN, an NVO3 technology, has adapted to the trend by providing virtualization solutions for data centers, allowing intra-VXLAN communication and communication between VXLANs and legacy networks.

Networking Description

On the network shown in Figure 15-55, an enterprise has VMs deployed for the finance and engineering departments and a legacy network for the human resource department. The finance and engineering departments need to communicate with the human resource department.

Figure 15-55 Communication between terminal users on a VXLAN and legacy network

Feature Deployment

As shown in Figure 15-55:

Deploy Device 1 and Device 2 as Layer 2 VXLAN gateways and Device 3 as a Layer 3 VXLAN gateway. The VXLAN gateways are VXLANs' edge devices connecting to legacy networks and are responsible for VXLAN encapsulation and decapsulation. Establish a VXLAN tunnel between Device 1 and Device 3 and between Device 2 and Device 3 for VXLAN packet transmission.

When the human resource department sends a packet to VM1 of the financial department, the process is as follows:
  1. Device 1 receives the packet and encapsulates it into a VXLAN packet before sending it to Device 3.
  2. Upon receipt, Device 3 decapsulates the VXLAN packet and removes the Ethernet header in the inner packet, parses the destination IP address, and searches the routing table for a next hop address. Then, Device 3 searches the ARP table based on the next hop address to determine the destination MAC address, VXLAN tunnel's outbound interface, and VNI.
  3. Device 3 encapsulates the VXLAN tunnel's outbound interface and VNI into the packet and sends the VXLAN packet to Device 2.
  4. Upon receipt, Device 2 decapsulates the VXLAN packet, finds the outbound interface based on the destination MAC address, and forwards the packet to VM1.
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Updated: 2019-01-02

Document ID: EDOC1100058405

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