If your business traffic may spike, we recommend that you enable the burstable clean bandwidth feature for your Anti-DDoS Pro or Anti-DDoS Premium instance. This avoids packet loss when the peak service traffic exceeds the clean bandwidth of your instance.

Prerequisites

An Anti-DDoS Pro instance is purchased.

For more information, see Purchase an Anti-DDoS Pro or Anti-DDoS Premium instance.

Background information

By default, the burstable clean bandwidth feature is disabled for your instance. After you add services to your instance, the peak service traffic may exceed the clean bandwidth that you select when you purchase the instance. If this situation happens, random packet loss occurs during service traffic forwarding. If this situation lasts for a long period of time, throttling occurs, and access to your services is affected. Clean bandwidth
The following list describes the scenarios in which the peak service traffic exceeds the clean bandwidth and the solutions specific to the scenarios:
  • If the clean bandwidth of your instance cannot meet your business requirements, you must upgrade your instance to increase the clean bandwidth. For more information, see Upgrade an instance.
  • If the clean bandwidth of your instance can meet your daily business requirements but cannot meet the requirements to handle traffic spikes, we recommend that you enable the burstable clean bandwidth feature.

    After you enable the burstable clean bandwidth feature, you can specify a burstable clean bandwidth to increase the upper limit of the total bandwidth that is supported by the instance. You are charged for the burstable clean bandwidth based on the pay-as-you-go billing method. For more information about the billing for the burstable clean bandwidth, see Billing of the burstable clean bandwidth feature.

Scenarios

We recommend that you enable the burstable clean bandwidth feature for your instance in the following scenarios:

  • Holiday promotions, such as Black Friday
  • Release of services, such as launch of a new gaming server or new product
  • Sharp increase in the number of access requests to websites, such as access requests to online course selection systems and government lottery systems within a specific period of time

Limits

After you enable the burstable clean bandwidth feature, the total bandwidth of the Anti-DDoS Pro instance can be up to 5 Gbit/s. The total bandwidth is equal to the clean bandwidth plus the burstable clean bandwidth that you specify. The burstable clean bandwidth cannot exceed nine times the clean bandwidth.

Examples:
  • If the clean bandwidth is 100 Mbit/s, the maximum burstable clean bandwidth that you can specify is 900 Mbit/s. If you specify a burstable clean bandwidth of 900 Mbit/s, the Anti-DDoS Pro instance supports the maximum service traffic of 1 Gbit/s.
  • If the clean bandwidth is 1 Gbit/s, the maximum burstable clean bandwidth that you can specify is 4 Gbit/s. If you specify a burstable clean bandwidth of 4 Gbit/s, the Anti-DDoS Pro instance supports the maximum service traffic of 5 Gbit/s.
  • If the clean bandwidth is 5 Gbit/s, you cannot enable the burstable clean bandwidth feature. In this case, if you need a higher bandwidth, submit a ticket or contact customer service.

Enable the burstable clean bandwidth feature

  1. Log on to the Anti-DDoS Pro console.
  2. In the top navigation bar, select Mainland China.
    If you select this region, the Anti-DDoS Pro console appears.
  3. In the left-side navigation pane, choose Assets > Instances.
  4. In the instance list, find the instance that you want to enable the feature and click the Pencil icon icon to the right of Added burst bandwidth in the Instance Type column.
  5. In the Burst bandwidth dialog box, turn on Enable burst bandwidth and specify a burstable clean bandwidth based on your business requirements. Enable burstable clean bandwidth_cn
    The minimum value of the Added burst bandwidth parameter is 50 Mbit/s. The maximum value can be nine times the clean bandwidth of the instance. For example, if the clean bandwidth is 100 Mbit/s, the maximum value that you can specify is 900 Mbit/s.
    Notice The sum of the clean bandwidth and the burstable clean bandwidth that you specify cannot exceed 5 Gbit/s. To prevent throttling, make sure that the sum is greater than your peak service traffic. For more information, see Billing examples.
  6. Click OK.
    After you complete the preceding settings, you can view the value of the Added burst bandwidth parameter in the Instance Type column.
After you enable the burstable clean bandwidth feature, you can refer to the preceding steps to specify a greater value for the Added burst bandwidth parameter. If you want to disable the burstable clean bandwidth feature, turn off Enable burst bandwidth.
Notice
  • You can disable the burstable clean bandwidth feature for each instance only once within one calendar month. If you disable the burstable clean bandwidth feature in a month, you are charged for the burstable clean bandwidth that you use when the feature is enabled in this month.
  • The burstable clean bandwidth feature is automatically disabled in the following scenarios:
    • Your instance expires. Expired instances do not provide services.
    • Your Alibaba Cloud account has an overdue payment. In this case, all services that are charged based on the pay-as-you-go billing method are unavailable.

    To continue using the burstable clean bandwidth feature, you must renew your instance or settle the overdue payment and enable the feature.

To view the operation logs of the burstable clean bandwidth, navigate to the Investigation > Operation Logs page. You can view the logs that are generated when you enable and disable the burstable clean bandwidth feature and modify the burstable clean bandwidth. For more information, see View operations logs.

Query bills for the burstable clean bandwidth

After you enable the burstable clean bandwidth feature, you can query the bill for the burstable clean bandwidth for each calendar month. To query the bills, log on to the Anti-DDoS Pro console and navigate to the Investigation > System logs page.

System logs_Burstable clean bandwidth_cn
The billing cycle is one calendar month. You are billed based on the following rules:
  • At 10:00 on the first day of each calendar month, the bill for the burstable clean bandwidth of the previous month is displayed on the System logs page, and Alibaba Cloud sends notifications to the contacts of your Alibaba Cloud account by email.

    The bill is in the To be billed state. The bill covers only the burstable clean bandwidth that you used within the previous month. You can view the bill details to check the usage of the burstable clean bandwidth within the previous month. For more information, see Query system logs.

    If you have any concerns about the usage of the burstable clean bandwidth, submit a ticket. If the amount of the burstable clean bandwidth in the bill is different from your actual usage, the bill is terminated, and you are not required to make a payment.

  • If you do not have concerns about the bill, the bill of the previous month is displayed on the System logs page at 10:00 on the tenth day of the current month.

    The bill is in the Already billed state, and the fees are automatically deducted from the balance of your Alibaba Cloud account. Make sure that the balance of your Alibaba Cloud account is sufficient. If your account has an overdue payment, all services that are charged based on the pay-as-you-go billing method become unavailable. The burstable clean bandwidth feature also becomes unavailable.