Resize a bandwidth plan - Cloud Enterprise Network - Alibaba Cloud Documentation Center

Bandwidth plans of Cloud Enterprise Network (CEN) can be resized based on your business requirements. This topic describes how to resize a bandwidth plan and the upgrade and downgrade rules.

Rules for resizing a bandwidth plan

Item	Description
Limits	Before you downgrade a bandwidth plan, make sure that the sum of the maximum bandwidth values specified for the inter-region connections does not exceed the bandwidth value to which you want to downgrade the bandwidth plan. You can adjust the maximum bandwidth values of inter-region connections. For more information, see Modify the maximum bandwidth value of an inter-region connection.
Effective time	The upgrade may be delayed for a few minutes due to network latency.
Impacts on billing	When you upgrade a bandwidth plan, you are charged for the price difference between the configurations for the remainder of the current billing cycle. The following billing rules apply: Upgrade fee = Cost of the upgraded plan - Cost of the original plan Cost of the upgraded plan = Hourly price (Monthly price of the upgraded plan/Number of calendar days in the month/24 hours) × Remaining subscription duration in hours Cost of the original plan = Hourly price (Monthly price of the original plan/Number of calendar days in the month/24 hours) × Remaining subscription duration in hours For more information, see Billing examples. Downgrades may generate refunds. The amount of refund is the price difference between the configurations for the remainder of the current billing cycle, and varies based on the discount and vouchers that were applied when you made the purchase. The actual amount of refund on the order page shall prevail. For more information, see Request a refund for the downgrade of resource specifications.
Scenarios	You can downgrade or upgrade your bandwidth plan based on business requirements.

Billing examples

On May 1, Alice purchased a subscription bandwidth plan of 2 Mbit/s for three months. The bandwidth plan enables network communication between regions inside the Chinese mainland. In the following examples, one month equals 30 days. The monthly price of the bandwidth plan is USD 68. In this case, the fee for a three-month subscription is USD 204.

One month later, Alice upgraded the bandwidth plan to 4 Mbit/s. The monthly price of a 4 Mbit/s bandwidth plan is USD 136. In this case, the upgrade fee is USD 136. The system calculates the upgrade fee based on the following formula:

Upgrade fee = Hourly price of the upgraded plan (USD 136/30 days/24 hours) × 2 months (60 days × 24 hours) - Hourly price of the original plan (USD 68/30 days/24 hours) × 2 months (60 days × 24 hours) = USD 136.

Procedure for resizing a bandwidth plan

Log on to the CEN console.
On the Instances page, click the ID of the CEN instance that you want to manage.
On the details page of the CEN instance, choose Basic Settings > Bandwidth Plans, find the bandwidth plan that you want to manage, and then click Downgrade or Upgrade in the Bandwidth column.
Set the Bandwidth parameter based on your business requirements.
In the Terms of Service section, read and select Terms of Service, click Buy Now, and then complete the payment.

References

DescribeCenGeographicSpanRemainingBandwidth: queries the remaining bandwidth resources of a bandwidth plan.
ModifyCenBandwidthPackageSpec: modifies the maximum bandwidth value of a bandwidth plan.