Help Center/ Elastic IP/ User Guide/ Shared Bandwidth/ Shared Bandwidth Overview
Updated on 2025-04-24 GMT+08:00
View PDF

Shared Bandwidth Overview

A shared bandwidth can be shared by multiple EIPs and controls the data transfer rate on these EIPs in a centralized manner. All ECSs 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 a bandwidth, a lot of bandwidths are required, which significantly increases bandwidth costs. If all EIPs share the same bandwidth, you can lower bandwidth costs and easily perform system O&M.

  • A shared bandwidth cannot control how much data can be transferred using a single EIP. Data transfer rate on EIPs cannot be customized.

Advantages

  • Lowered Bandwidth Costs

    Region-level bandwidth sharing and multiplexing reduce bandwidth usage and O&M costs.

  • Flexible Operations

    You can add pay-per-use EIPs (except for 5_gray EIPs of dedicated load balancers) to or remove them from a shared bandwidth regardless of the type of instances that they are bound to.

  • Flexible Billing Modes

    The yearly/monthly and pay-per-use billing modes are provided.

Methods of Using a Shared Bandwidth

You can use the shared bandwidth in either of the two ways shown in the following table.

Table 1 Methods of using a shared bandwidth

Description

Step

Method 1: Assign a shared bandwidth and add your pay-per-use EIPs to the bandwidth.
  1. Assigning a Shared Bandwidth
  2. Adding EIPs to or Removing EIPs from a Shared Bandwidth

Method 2: Assign a shared bandwidth, set Billed By to Shared Bandwidth and select the shared bandwidth when you assign pay-per-use EIPs.
  1. Assigning a Shared Bandwidth
  2. Assigning an EIP

Shared Bandwidth Quotas

  • A maximum of 20 EIPs that are billed on a pay-per-use basis can be added to a shared bandwidth. If you want to add more EIPs to a shared bandwidth, submit a service ticket to request a quota increase.

Notes and Constraints

  • A shared bandwidth can only be used by resources from its same account.
  • The minimum size of a shared bandwidth that can be purchased is 5 Mbit/s. You can only add pay-per-use EIPs to a shared bandwidth.
  • If a yearly/monthly shared bandwidth is deleted upon expiration, EIPs sharing the bandwidth will be removed from the bandwidth and be billed based on the mode before they are added to the shared bandwidth.
  • A dedicated bandwidth cannot be changed to a shared bandwidth and vice versa. However, you can purchase a shared bandwidth for pay-per-use EIPs.
    • Add an EIP to a shared bandwidth and then the EIP will use the shared bandwidth.
    • Remove the EIP from the shared bandwidth and then the EIP will use the dedicated bandwidth.
  • If you want to submit a service ticket, refer to Submitting a Service Ticket.

Related Operations

Parent Topic: Shared Bandwidth