• Categories:Industry News
• Time of issue:2022-07-26

(Summary description)      To better meet the needs of cloud data centers, many data center network solutions emerge. For example, Huawei DATA center switches (CloudEngine series), Huawei DATA center controllers (iMaster NCE-Fabric), and Intelligent Network Analysis Platform (iMaster NCE-FabricInsight) provide the following two recommended data center interconnection solutions.       End-to-end VXLAN scheme       Data center interconnection based on an end-to-end VXLAN tunnel refers to the following: The computing and network of multiple DCS are unified resource pools and centrally managed by one Cloud platform and one iMaster NCE-Fabric. Multiple DCS are unified end-to-end VXLAN domains, and users' Virtual Private Cloud (VPC). Virtual private cloud (VSP) and subnet can be deployed across DCS to directly realize service communication. Its deployment architecture is 25G SFP28 Duplex as shown in the following figure. Schematic diagram of the end-to-end VXLAN solution       In this solution, an end-to-end VXLAN tunnel must be established between multiple data centers. As shown in the following figure, Underlay routes must be interconnected between data centers. Secondly, in Overlay network layer, EVPN should be deployed between Leaf devices in two data centers. In this way, Leaf devices at both ends discover each other through EVPN and transfer VXLAN encapsulation information to each other through EVPN routes, triggering the establishment of end-to-end VXLAN tunnels. The end-to-end VXLAN tunnel diagram       This scheme is mainly used to match the Muti-POD scenario. Point of Delivery (PoD) refers to a group of relatively independent physical resources. Multi-pod refers to an iMaster NCE-Fabric that manages multiple PODS. Multiple pods form an end-to-end VXLAN domain. This scenario applies to the interconnection of small data centers that are close to the same city. Segment VXLAN scheme       Data center interconnection based on Segment VXLAN tunnel refers to: In the multi-DC scenario, the computing and network of each DC are independent resource pools, which are independently managed by their respective cloud platforms and iMaster NCE-Fabric. Each DC is an independent VXLAN domain. A DCI VXLAN domain is required for communication between DCS. In addition, users' VPCS and subnets are deployed in their own data centers. Therefore, service communication between different data centers needs to be orchestrated by upper-layer cloud management platforms. The following figure shows the deployment architecture. Segment VXLAN scheme architecture diagram       In this solution, VXLAN tunnels must be established within and between data centers. As shown in the following figure, Underlay routes must be interconnected between data centers. Second, at the Overlay network level, EVPNs are deployed between Leaf devices inside the data center and DCI gateways, as well as between DCI gateways in different data centers. In this way, related devices discover each other through EVPN protocol and transmit VXLAN encapsulation information to each other through EVPN route, thereby triggering the establishment of Segment VXLAN tunnels. Segment VXLAN scheme architecture diagram       This solution is mainly used to match multi-site scenarios, which are applicable to the interconnection of multiple data centers located in different regions, or the interconnection of multiple data centers that are too far apart to be managed by the same iMaster NCE-Fabric.