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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 in VM Migration Scenarios

Application in VM Migration Scenarios

Service Description

Enterprises on data center networks deploy server virtualization to implement IT resource integration, improve resource usage, and reduce network costs. With the wider deployment of server virtualization, more VMs are running in physical servers, and more applications are running in virtualization environments, which brings challenges to virtual networks.

Networking Description

On the network shown in Figure 15-56, an enterprise has two clusters in the data center: engineering and finance departments in Cluster1 and the marketing department in Cluster2.

The computation space on Cluster1 is inadequate, whereas that on Cluster2 is not fully utilized. The network administrator wants to migrate the engineering department to Cluster2 without affecting services.

Figure 15-56 Enterprise distribution networking

Feature Deployment

To ensure that services are not interrupted during the migration of the engineering department, the IP and MAC addresses of the engineering department must remain unchanged. This requires that the two Servers belong to the same Layer 2 network. Conventional methods would require additional physical devices for traffic distribution and may also result in network loops and additional system and management costs.

VXLAN can be used to migrate the engineering department to Server2. VXLAN is a network virtualization technique that uses MAC-in-UDP encapsulation. All terminal users that are reachable at Layer 3 can construct a large Layer 2 network as long as the physical network supports IP forwarding.

VXLAN allows the engineering department to migrate, whereas the network is unaware of it. After the engineering department is migrated from Cluster1 to Cluster2, tenants send gratuitous ARP or RARP packets. The MAC address and ARP tables of VMs pre-migration saved on gateways are replaced by new MAC address and ARP tables of VMs post-migration.

Updated: 2019-01-02

Document ID: EDOC1100058405

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