The cloud also needs its own network. The existence of SDN and VPC

If cloud computing is compared to water resources, cloud networks are like taps. Enterprises can choose and adjust the size and amount of water flow when they migrate to the cloud. More importantly, enterprises do not choose randomly, but have clear regional divisions. Each enterprise has its own private network island and needs to design a cloud virtualized network.

Cloud needs to build elastic network private island

In cloud virtualized networks, several principles must generally be guaranteed: SLA stability, performance, service capabilities, and scalability (including horizontal and vertical expansion). Simply put, it is necessary to ensure that the cloud network supports elastic interconnection between various products such as cloud computing, storage, and big data, and to ensure the independence and stability of the network, so that the use of the cloud network is no different from that of the physical network.

From the perspective of operation and maintenance, this network design model, deployment method and visual operation and maintenance method make it easier for enterprises to allocate human resources. However, it should be emphasized that the emergence of cloud does not mean that enterprises do not need to hire their own operation and maintenance personnel at all, and AI and operation cannot replace everything.

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VPC network ensures enterprise cloud network security

In cloud networks, there are two main types: basic network and VPC network. Basic network is a resource pool shared by all users, like rivers, lakes and seas; while VPC (Virtual Private Cloud) is also called a proprietary network. VPC is an independent reservoir and an isolated network environment.

When different external enterprise users access virtual machines, they cannot affect each other and their services must be isolated. VPC generally consists of a private network segment, a router, and at least one switch. This type of VPC network can improve security.

Customize your own private network on the public cloud

In the public cloud network, users can customize private networks based on a single product or a combination of multiple products according to their needs. Through the VPC private network, an isolated network environment is built. Private networks are completely isolated logically, thereby isolating some problems faced by cloud computing architecture. In this network, enterprises can fully control their own private networks, such as selecting IP address ranges, configuring routing tables and gateways, etc., and can provide instance-level and subnet-level security protection through security groups and network ACLs to prevent DDOS attacks and WAF.

Building an SDN private network ecosystem

As a dedicated network space on the cloud, VPC has become one of the standard network architectures provided by large cloud vendors such as AWS, Alibaba Cloud, and Tencent Cloud. Although VPCs provided by different cloud vendors vary in terms of custom networks, security, and rich connections, SDN software-defined networking is essential in VPC management and operation.

Users can manage private networks VPC through software-defined networking, implement configuration management of IP addresses, subnets, routing tables, network ACLs, flow logs and other functions, and manage networks and costs.

From the current application scenarios, virtualized personal cloud networks are mainly used in cloud high-performance networks (such as video and live broadcast services), cloud IoT networks, cloud business acceleration, cloud two-site three-center, hybrid cloud architecture, etc. Through SDN software-defined networks, you can use APIs to customize private network segments, subnet segments, and routing strategies, realize visual operation and maintenance management, and optimize network performance.

Conclusion

Cloud computing has its own basic network and also has VPC private networks customized for enterprises. In the cloud, the enterprise's own network is actually isolated from the entire public cloud network, and the enterprise has its own local area network.