Function Overview

EIPs can be billed on a yearly/monthly or pay-per-use basis. The billing options and billing items vary depending on the billing mode.

• A yearly/monthly EIP only can be billed by bandwidth.
• A pay-per-use EIP can be billed by bandwidth, traffic, or shared bandwidth.

Billing items of an EIP billed by bandwidth: bandwidth and EIP

Billing items of an EIP billed by traffic: traffic and EIP

Billing items of an EIP added to a shared bandwidth: shared bandwidth and EIP

The EIP service provides multiple billing modes for you to select. You can change your EIP billing mode during the EIP usage period if necessary.

• From yearly/monthly to pay-per-use
• From pay-per-use to yearly/monthly
• From billing by traffic (pay-per-use) to billing by bandwidth (pay-per-use)
• From billing by bandwidth (pay-per-use) to billing by traffic (pay-per-use)

Note: The billing mode of an EIP billed on a yearly/monthly basis cannot be directly changed to be billed on a pay-per-use basis by traffic.

Shared bandwidth allows multiple EIPs to share the same bandwidth. All ECSs, BMSs, and load balancers that have EIPs bound in the same region can share a bandwidth.

When you host a large number of applications on the cloud, if each EIP uses an independent bandwidth, a lot of bandwidths are required, which significantly increases bandwidth costs. If all EIPs share the same bandwidth, you can lower bandwidth cost and easily perform system O&M.

You can assign, modify, delete a shared bandwidth, and add or remove EIPs to or from a shared bandwidth.