After your on-premises networks are connected to Alibaba Cloud through Smart Access Gateway (SAG), you can use application acceleration plans to quickly and stably access applications that are deployed in regions outside mainland China.

Limits

  • Application acceleration plans can be used only in scenarios where clients in mainland China access applications that are deployed in regions outside mainland China.
  • SAG vCPE instances do not support application acceleration plans.
  • If you use an SAG CPE instance, the version of the SAG device that is associated with the SAG instance must be 2.4.0 or later.

    If the version of the SAG device is earlier than 2.4.0, you must upgrade it. For more information, see Upgrade an SAG device to a later version.

  • If you use an SAG app instance, the version of the SAG app that is associated with the SAG app instance must be 2.4.0 or later.

    If the version of the SAG app is earlier than 2.4.0, you must upgrade it. For more information about the SAG app, see Install the SAG app.

Scenarios

Based on the high-quality bandwidth resources provided by Alibaba Cloud, application acceleration plans can reduce network latency, jitter, and packet loss during data transfer. After an SAG instance is associated with an application acceleration plan, the bandwidth plan can be applied to your on-premises networks through Alibaba Cloud access points. This accelerates access to one or more applications that are deployed in regions outside mainland China.

Architecture

Procedure

  1. Connect on-premises networks to Alibaba Cloud by using SAG. For more information about how to connect on-premises networks to Alibaba Cloud by using SAG, see the following topics.
  2. Purchase an application acceleration plan. For more information, see Work with application acceleration plans.
  3. Associate the application acceleration plan with an SAG instance. For more information, see Associate an application acceleration plan with an SAG instance.

    After the application acceleration plan is associated with an SAG instance, the bandwidth plan can be applied to the on-premises networks that are associated with the SAG instance.

  4. Add an application acceleration rule. For more information, see Manage an application acceleration rule.

    An application acceleration rule is used to allocate bandwidth resources that you can use to access different applications. Access to applications deployed in regions outside mainland China can be accelerated only after you add an application acceleration rule.

Differences between the maximum bandwidth value for an SAG instance and the maximum bandwidth value for an application

When you associate an application acceleration plan with an SAG instance, the value of the Maximum Bandwidth parameter refers to the maximum bandwidth that can be used to accelerate access from the on-premises networks associated with the SAG instance. For each SAG instance, the maximum value of the Maximum Bandwidth parameter cannot exceed that of the associated application acceleration plan.

When you add an application acceleration rule, the value of the Maximum Bandwidth parameter refers to the maximum bandwidth that can be used to accelerate access from on-premises networks associated with one or more SAG instances to the specified application. For each application acceleration plan, the sum of Maximum Bandwidth values that you set for different applications cannot exceed the maximum bandwidth value of the application acceleration plan.

For more information, see Throttle bandwidth for application acceleration from multiple dimensions.