Internet Shared Bandwidth quotas and limits-Internet Shared Bandwidth(Internet Shared Bandwidth)-阿里云帮助中心

Learn about quotas, bandwidth limits, and EIP requirements for Internet Shared Bandwidth.

Quotas

Resource	Default limit	Actions
Pay-as-you-go Internet Shared Bandwidth instances per account per region	pay-by-bandwidth: 5 pay-by-enhanced-95th-percentile: 5 pay-by-dominant-traffic: 10	Contact your business manager.
EIPs per Internet Shared Bandwidth instance	100	Request a quota increase in Quota Center. Create a quota increase application.

Bandwidth limits

Internet Shared Bandwidth uses a distributed, highly reliable cluster architecture. To guarantee the performance and stability of bandwidth, Internet Shared Bandwidth automatically enables distributed rate limiting when the peak bandwidth of the Internet Shared Bandwidth instance that you purchase exceeds 1 Gbps. All traffic is evenly distributed across multiple system servers in the cluster. The peak bandwidth that you configure for the instance is also evenly distributed across these servers. As a result, the Internet Shared Bandwidth instance reaches the configured peak bandwidth only when multiple connections are used. The required number of connections varies with your actual workload.

Maximum bandwidth per connection = Maximum bandwidth of the Internet Shared Bandwidth instance / Number of servers in the Internet Shared Bandwidth cluster

For example, if you configure a maximum bandwidth of 2,000 Mbps and the Internet Shared Bandwidth cluster uses four system servers to forward traffic, the maximum bandwidth per connection on the Internet Shared Bandwidth instance is 500 Mbps (2,000 Mbps / 4). In this case, the Internet Shared Bandwidth instance reaches the configured peak bandwidth when it has four or more connections.

Important

An Internet Shared Bandwidth instance may occasionally exceed its configured maximum bandwidth. This limit is continuously refined. We recommend that you set the maximum bandwidth slightly above your actual requirements.
The maximum bandwidth is a reference upper limit, not a guaranteed commitment. During resource contention, actual bandwidth may fall below the configured maximum.

Inbound and outbound bandwidth limits:

Inbound bandwidth: equals the maximum bandwidth you purchase.
Outbound bandwidth: equals the maximum bandwidth you purchase.

For example, if you purchase an instance with a maximum bandwidth of 5 Gbps, the maximum inbound and outbound bandwidth are both 5 Gbps.

EIP requirements

An EIP can be added to an Internet Shared Bandwidth instance only if it meets these requirements:

The EIP uses the pay-as-you-go billing method.
The EIP is in the same region as the Internet Shared Bandwidth instance.
The EIP has the same line type as the Internet Shared Bandwidth instance.