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What Are EIPs?

An EIP is a public IP address that can be accessed directly over the Internet. An EIP consists of a public IP address and some amount of public network egress bandwidth. EIPs can be bound to or unbound from ECSs, BMSs, virtual IP addresses, NAT gateways, and load balancers.

Each EIP can be used by only one cloud resource at a time.

Figure 1 Connecting to the Internet using an EIP

Advantages

EIPs have the following advantages:
  • Flexibility

    An EIP can be flexibly associated with or disassociated from the ECS, BMS, NAT gateway, load balancer, or virtual IP address. The bandwidth can be adjusted according to service changes.

  • Cost-effective

    Pay-per-use (based on bandwidth usage or amount of traffic) and yearly/monthly billing modes are available. EIPs can use shared bandwidth to lower bandwidth costs. The yearly/monthly billing mode is more cost-effective for you.

  • Easy to use

    EIP associations, disassociations, and bandwidth adjustments take effect immediately.