This topic describes the limits on EIP bandwidth plans.

Quota limits

The following table describes the quotas of EIP bandwidth plans.

Item Limit Quota increase
The number of pay-as-you-go EIP bandwidth plans that can be created with an Alibaba Cloud account in each region 5 N/A
The number of elastic IP addresses (EIPs) that can be associated with each EIP bandwidth plan 100

You can increase the quota on the Quota Management page . For more information, see Manage resource quotas.

Bandwidth limits

To ensure the efficiency and stability of data transfer, EIP bandwidth plans use a distributed cluster architecture that provides high reliability. Network traffic is evenly distributed to servers in a cluster. The maximum bandwidth value of an EIP bandwidth plan equals the maximum bandwidth values of all servers. The maximum bandwidth of an EIP bandwidth plan can be reached only if the EIP bandwidth plan is applied to more than one connection.

Maximum bandwidth of each connection = Maximum bandwidth of an EIP bandwidth plan/Number of servers in the cluster

For example, if the maximum bandwidth of an EIP bandwidth plan is 2,000 Mbit/s, and four servers are used to forward traffic, the maximum bandwidth of each connection is 500 Mbit/s (2,000/4).

Notice
  • In some cases, the actual bandwidth that the EIP bandwidth plan allocates may be higher than the specified maximum bandwidth. However, these cases will be rarer as the service upgrades. To avoid business interruption, we recommend that you set the maximum bandwidth to a value higher than the value required by your business when you purchase an EIP bandwidth plan.
  • If the maximum bandwidth of the EIP bandwidth plan that you purchase exceeds 1 Gbit/s, the EIP bandwidth plan automatically throttles the bandwidth of each server in the distributed cluster.
Limits on inbound and outbound bandwidth
  • Inbound bandwidth: The system allocates bandwidth that equals the maximum bandwidth of the bandwidth plan for inbound traffic.
  • Outbound bandwidth: The system allocates bandwidth that equals the maximum bandwidth of the bandwidth plan for outbound traffic.

For example, if the maximum bandwidth of the EIP bandwidth plan that you purchase is 5 Gbit/s, inbound and outbound traffic can be transmitted at a maximum of 5 Gbit/s.

Limits on EIPs

Take note of the following limits when you add EIPs to an EIP bandwidth plan.

  • The billing method of the EIPs is pay-as-you-go.
  • The EIPs are created in the same region as the EIP bandwidth plan.
  • The network of the EIPs must be the same as that of the EIP bandwidth plan.