Upgrade or downgrade a Cloud Enterprise Network (CEN) bandwidth plan to match your current inter-region traffic requirements.
Upgrade and downgrade rules
| Item | Upgrade | Downgrade |
| Prerequisites | None. You can upgrade at any time. | The sum of maximum bandwidth values assigned to all inter-region connections must not exceed the target bandwidth value. Before you downgrade, reduce the bandwidth of inter-region connections if needed. For more information, see Modify the maximum bandwidth value of an inter-region connection. |
| Effective time | The upgrade may take a few minutes to take effect due to network latency. | Immediate. |
| Billing | You are charged for the price difference between the original and upgraded configurations for the remainder of the current billing cycle. See Billing details. | A downgrade may generate a refund. The refund is the price difference for the remainder of the current billing cycle. The actual refund varies based on discounts and vouchers applied at purchase. The amount shown on the order page prevails. For more information, see Request a refund for the downgrade of cloud resource specifications. |
Procedure
Log on to the CEN console.
On the Instances page, click the ID of the CEN instance that you want to manage.
- On the instance details page, choose , find the target bandwidth plan, and then click Downgrade or Upgrade in the Bandwidth column.
- Set the Bandwidth parameter.
In the Terms of Service section, read and select Terms of Service, click Buy Now, and then complete the payment.
Billing details
When you upgrade a subscription bandwidth plan, the fee is the price difference between the original and upgraded plan for the remaining subscription period.
Formula:
Upgrade fee = Cost of upgraded plan - Cost of original plan
Where:
Cost of upgraded plan = (Monthly price of upgraded plan / Calendar days in the month / 24) x Remaining hours
Cost of original plan = (Monthly price of original plan / Calendar days in the month / 24) x Remaining hours
Billing example
On May 1, Alice purchased a 2 Mbit/s subscription bandwidth plan for three months. The plan covers inter-region communication within the Chinese mainland. For this example, one month equals 30 days.
| Item | Value |
| Original bandwidth | 2 Mbit/s |
| Monthly price (2 Mbit/s) | USD 68 |
| Three-month subscription fee | USD 204 |
One month later, Alice upgraded the plan to 4 Mbit/s (monthly price: USD 136). The remaining subscription period is two months (60 days).
Calculation:
Upgrade fee = (USD 136 / 30 / 24) x (60 x 24) - (USD 68 / 30 / 24) x (60 x 24) = USD 136
API reference
| Operation | Description |
| DescribeCenGeographicSpanRemainingBandwidth | Queries the remaining bandwidth of a bandwidth plan. |
| ModifyCenBandwidthPackageSpec | Modifies the bandwidth value of a bandwidth plan. |