Help Center/ Anti-DDoS Service/ FAQs/ AAD FAQs/ Fees/ How Is the Elastic Service Bandwidth Charged?
Updated on 2026-06-11 GMT+08:00

How Is the Elastic Service Bandwidth Charged?

If the actual bandwidth used by a service exceeds the service bandwidth, rate limiting and packet loss may occur. Enabling elastic service bandwidth can effectively prevent rate limiting and packet loss.

The elastic bandwidth of AAD is a post-paid, value-added item. Total available bandwidth = Service bandwidth + Elastic bandwidth

Billing Rules

The elastic bandwidth of AAD supports monthly 95th percentile billing. It can be scaled to up to 10,000 Mbit/s.

If your actual bandwidth exceeds the service bandwidth plus the elastic bandwidth, rate limiting and packet loss may occur. Select an elastic bandwidth based on your traffic volume.

The elastic bandwidth fees in different scenarios are described as follows.

Table 1 Billing rules

Service Bandwidth

Elastic Bandwidth

Actual Service Bandwidth

Elastic Bandwidth Fee

Description

100 Mbit/s

Disabled

120 Mbit/s

No elastic bandwidth fees will be generated.

If bandwidth exceeds your configured quota, traffic may be limited and packet loss may occur.

100 Mbit/s

Enabled

100 Mbit/s

No elastic bandwidth fees will be generated.

If the actual service bandwidth is less than or equal to the service bandwidth, no elastic service bandwidth fee is generated.

100 Mbit/s

Enabled

120 Mbit/s

Elastic bandwidth fees will be generated.

If the actual bandwidth is higher than the service bandwidth, elastic service bandwidth fees will be generated.

Billing Principles

  • Monthly 95th percentile billing

    Traffic is averaged over 5-minute intervals throughout each calendar month. These 5-minute averages are sorted in descending order, the top 5% are discarded, and the highest remaining value is taken as the billing bandwidth. Figure 1 shows how to calculate the monthly 95th percentile bandwidth for 30 days.

    Figure 1 Monthly 95th percentile billing