If your on-premises networks need fast, reliable access to applications deployed outside the Chinese mainland, application acceleration plans use Alibaba Cloud's high-quality bandwidth resources to reduce latency, jitter, and packet loss during data transfer.
How it works
After connecting your on-premises network to Alibaba Cloud through Smart Access Gateway (SAG), you associate an application acceleration plan with your SAG instance. The plan is applied through Alibaba Cloud access points, accelerating access to applications outside the Chinese mainland. You then define acceleration rules to allocate bandwidth for specific applications.
Before you begin
Check that your setup meets these requirements before configuring application acceleration:
Direction: Application acceleration plans support only one direction — clients in the Chinese mainland accessing applications in regions outside the Chinese mainland.
Instance type: SAG virtual CPE (vCPE) instances do not support application acceleration plans.
SAG CPE device version: The SAG device associated with your SAG CPE instance must be version 2.4.0 or later. To upgrade, see Upgrade an SAG device to a later version device to a later version. We recommend that you upgrade your SAG device to the latest version.").
SAG app version: The SAG app associated with your SAG app instance must be version 2.4.0 or later. To upgrade, see Install the SAG app app instance and configure instance, you can install to access Alibaba Cloud resources.").
Get started
Step 1: Connect your on-premises network to Alibaba Cloud
This step establishes the network path that the acceleration plan will use. Deploy an SAG device or set up the SAG app:
SAG devices: Deploy an SAG device in inline mode. In this example, the office branches are located in Hangzhou and Ningbo, and the VPCs are deployed in the China \(Shanghai\) and China \(Beijing\) regions.") or Deploy an SAG device in one-arm mode and enable static routing device in one-arm mode and use the SAG device to connect on-premises networks to Alibaba Cloud.")
SAG app: Get started with the SAG app app instance.")
Step 2: Purchase an application acceleration plan
Buy a plan that covers the bandwidth your workloads need. The plan's total bandwidth sets the upper limit for all downstream configurations. For details, see Work with application acceleration plans, you can use application acceleration plans to quickly and stably access applications that are deployed in regions outside the Chinese mainland.").
Step 3: Associate the plan with your SAG instance
Link the acceleration plan to an SAG instance. Once associated, the bandwidth becomes available to all on-premises networks connected through that instance. For details, see Associate an application acceleration plan with an SAG instance instance, the on-premises networks associated with the SAG instance can use the bandwidth for application acceleration. This topic describes how to associate an application acceleration plan with an SAG instance.").
Step 4: Add an application acceleration rule
Define a rule to allocate bandwidth for each application to accelerate. Acceleration does not take effect until at least one rule is configured. For details, see Manage an application acceleration rule instance, you must configure an application acceleration rule. An application acceleration rule is used to allocate bandwidth resources for different applications. This topic describes how to add, modify, or delete an application acceleration rule.").
Bandwidth limits
The Maximum Bandwidth parameter controls bandwidth at two levels. Setting limits at both levels lets you prevent any single instance or application from consuming the entire plan's capacity.
| Level | Where it is set | What it controls | Constraint |
|---|---|---|---|
| SAG instance | When associating a plan with an SAG instance | Maximum bandwidth available to all on-premises networks connected through that SAG instance | Cannot exceed the total bandwidth of the associated application acceleration plan |
| Application | When adding an acceleration rule | Maximum bandwidth available to on-premises networks (across one or more SAG instances) for a specific application | The sum across all application rules cannot exceed the plan's total bandwidth |
For an in-depth explanation of multi-dimensional bandwidth throttling, see Throttle bandwidth for application acceleration from multiple dimensions instances. To prevent on-premises networks associated with one SAG instance from consuming a large amount of bandwidth resources, the system allows you to throttle bandwidth from different dimensions. This way, you can use bandwidth resources for application acceleration more flexibly and effectively.").