Explain in detail the typical planning and design scheme of financial data center network!!!

Fancy Wang 0317 2022

Planning and design scheme of financial data center network

The planning and design scheme of financial data center network, according to the degree of automation, is divided into cloud-network integration, network virtualization + scheme and network virtualization scheme:

Cloud-Network Integration Solution:

The cloud-network integration solution supports the SDN controller docking platform, manages the VXLAN domain in the south, and realizes IaaS automation. The overall architecture is shown in the figure:

The application scenarios of the cloud-network integration solution are as follows. The computing resources of the data center are transferred to the cloud and managed by Huawei FusionSphere or other OpenStack cloud platforms. The data center network adopts the spine-leaf architecture, which facilitates the SDN controller to establish a configuration model, and the SDN controller and the cloud platform are connected to realize cloud-network collaboration and automatic provisioning. configuration.

The application scenarios of the cloud-network integration solution are as follows. The computing resources of the data center are transferred to the cloud and managed by Huawei FusionSphere or other OpenStack cloud platforms.

The data center network adopts the spine-leaf architecture, which facilitates the SDN controller to establish a configuration model, and the SDN controller and the cloud platform are connected to realize cloud-network collaboration and automatic provisioning. configuration.

• The SDN controller is connected to the OpenStack cloud platform, and is linked with computing and storage resources to realize automatic configuration of Layer 2-Layer 7 networks。
• The underlay network is a spine-leaf architecture, and uses EBGP or OSPF as the routing protocol to achieve Layer 3 reachability of the underlay network.
• VXLAN is used as the network virtualization solution, and IBGP.EVPN is used as the control plane protocol of VXLAN to automatically establish VXLAN tunnels and synchronize Layer 2/Layer 3 forwarding entries.
• Distributed VXLAN gateways are used, and the gateways are deployed on the server leaf to ensure optimal traffic forwarding paths.
• Use the Border Leaf as the north-south border gateway and deploy M-LAG on the Border Leaf.
• Deploy independent service leaf and connect VAS (value-added service) equipment to facilitate flexible access and elastic expansion of VAS equipment. Service Leaf and Border Leaf can be combined to reduce costs.
• Use the unified enterprise network management system to manage the Underlay network, simplifying the configuration of the Underlay network.

Network Virtualization + Solution

The network virtualization + solution is that the SDN controller connects to the virtual machine manager, manages the VXLAN domain in the south, and realizes the automation of computing resources and network collaboration. The overall architecture is shown in the figure:

The application scenarios of the network virtualization + solution are as follows. VMWare or other virtualization servers are used to manage the computing resources of the data center, and the SDN controller is connected with the virtual machine manager to realize the linkage between the network and computing resources.

Different from the cloud-network integration solution, in this scenario, the SDN controller is connected to the VMM (virtual machine management) in the north direction, and is linked with computing resources to realize automatic configuration of the Layer 2/Layer 3 network. Resource Management Center) and Microsoft's System Center. This solution manages the VXLAN domain of the spine-leaf architecture in the south direction, and can deploy centralized or distributed VXLAN gateways.

Network virtualization solutions:

The network virtualization solution is that the SDN controller and the computing management platform (such as vCenter, Open Stack) independently issue service configurations, manage the VXLAN domain in the south, and the SDN controller provides the automation function of the overlay network.

The overall architecture is as follows:

The application scenarios of the network virtualization solution are as follows: the access server is VMWare Vss (virtual software switch), etc., which is not managed by the cloud platform, and the SDN controller and the computing management platform provide services independently.

Similar to the network virtualization+ solution, the network virtualization solution implements resource pooling of computing resources through VMWare, but the difference is that the SDN controller and the computing management platform issue services independently without linkage. In addition, this solution also manages the VXLAN domain of the spine-leaf architecture in the south direction, and can deploy centralized and distributed VXLAN gateways.

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