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In cloud computing, virtual server for cloud, bare metal servers, virtual IP (VIP), etc. If you need to have the ability to public communication, in general is a public IP connection Settings, but public IP cannot hold alone, not Shared more public IP network bandwidth, and does not support the elastic plug and other special requirements, Therefore, many cloud vendors offer another upgraded product, which is elastic public IP.

Elastic public IP Address The Elastic PUBLIC IP address provides an independent public IP address resource, including public IP addresses and public network egress bandwidth services. Elastic Public IP addresses can be flexibly bound or unbound from elastic cloud servers, bare-metal servers, virtual IP addresses, elastic load balancers, and NAT gateways, as shown in the following figure.

Flexibility is also manifested in the support for independent purchase and hold, namely:

  • An elastic public IP address can be purchased independently rather than bound with other computing or storage resources.
  • An elastic public IP address can be used as an independent resource for your account.

Multiple charging modes and flexible charging modes, such as on-demand, bandwidth, and traffic, meet the requirements of various service scenarios. Shared bandwidth Compared with a public IP address, an elastic public IP address can be added to the shared bandwidth to improve bandwidth utilization and greatly reduce public network cost. Out-of-the-box, supports convenient binding and unbinding operations, adjusts the bandwidth of an elastic public IP address, and takes effect in real time. In addition to the capabilities mentioned above, elastic public IP addresses can also provide some premium routes. For example, premium routes can be directly connected to the Mainland of China through the public network of domestic carriers without having to bypass the export of international carriers, which can greatly reduce network latency.

It also supportsInternet Data Center (IDC) is migrated to the cloudTo migrate the cloud over its own IPV4 address and support ultra-elastic bandwidth multiplexing. Use this way, can achieve less business transformation; The public IP address remains unchanged, minimizing the cost of cloud transformation and the loss caused by service migration and shutdown.

There are also some niche capabilities, such as support for IPv6 conversions and so on.

At present, most domestic cloud service providers can provide elastic public IP, including Ali Cloud, Tencent Cloud, Tianyi Cloud, mobile cloud and so on. Of course, foreign products also provide such capabilities, including AWS, Azure, GCP and so on. Students who are interested can go to the official websites of these cloud providers to learn.