If the public bandwidth of a subscription Elastic Compute Service (ECS) instance associated with a static public IP address (also known as auto-assigned or system-assigned public IP address) does not meet your business requirements, you can modify its public bandwidth configurations.
Background information
You can modify the fixed or peak bandwidth of an instance based on its billing method for network usage.
You can upgrade or downgrade the fixed bandwidths of instances that use the pay-by-bandwidth billing method for network usage. For more information, see Upgrade or downgrade fixed bandwidths.
ImportantWhen you downgrade fixed bandwidths, you may receive a refund. The refund amount is the price difference between the original and new configurations.
Downgrade operations have a monthly quota limit, which is determined based on your historical consumption. The actual quota is displayed on the relevant page in the ECS console. When the monthly quota is exhausted, you cannot downgrade instance configurations until the quota is reset on the first day of the next month.
You can modify the peak bandwidths of instances that use the pay-by-traffic billing method for network usage. For more information, see Modify peak bandwidths.
When you modify the public bandwidth configurations of an instance, take note of the following limits:
Your ECS usage determines whether the public bandwidth configurations of your instances can be downgraded.
The public bandwidth configurations of an instance can be modified multiple times. However, you must wait at least 5 minutes between two consecutive modifications on the same instance.
This topic describes how to modify the public bandwidth configurations of a subscription instance associated with a static public IP address. If your instance is associated with an elastic IP address (EIP), modify the bandwidth of the EIP.
Upgrade or downgrade fixed bandwidths
Perform the following operations to upgrade the fixed bandwidths of instances that use the pay-by-bandwidth billing method for network usage.
If you did not assign a public IP address to an instance during instance creation, the instance has no public bandwidth. You can assign a public IP address to the instance by upgrading the fixed bandwidth of the instance from 0 Mbit/s to a non-zero value.
Go to ECS console - Instance.
In the top navigation bar, select the region and resource group of the resource that you want to manage.
Upgrade or downgrade fixed bandwidths.
Upgrade fixed bandwidths
Use one of the following methods to upgrade fixed bandwidths:
To upgrade the fixed bandwidth of a single subscription instance, find the instance and choose
> Upgrade/Downgrade > Change Subscription Instance Bandwidth in the Actions column.To batch upgrade the fixed bandwidths of multiple subscription instances, select the instances and choose in the lower-left corner.
In the dialog box that appears, select Upgrade Bandwidth and click Continue.
On the Upgrade Bandwidth page, increase the fixed bandwidth value in the Public Bandwidth section.
During a batch upgrade operation, selected instances that do not meet requirements are automatically filtered out, such as those that are not associated with static public IP addresses or do not use the pay-by-bandwidth billing method for network usage. You can continue to operate only on the eligible instances, as shown in the following figure.
Read the notes, and read and select ECS Terms of Service.
Confirm the fees and click Upgrade. Follow the on-screen instructions to complete subsequent operations.
NoteThe first time you upgrade the public bandwidth of an instance in the classic network from 0 Mbit/s to a non-zero value, you must restart the instance in the ECS console or by calling the RebootInstances operation for the new configuration to take effect.
Downgrade fixed bandwidths
ImportantBandwidth downgrade operations can downgrade only the baseline bandwidths of instances.
Use one of the following methods to downgrade fixed bandwidths:
To downgrade the fixed bandwidth of a single subscription instance, find the instance and choose
> Upgrade/Downgrade > Change Subscription Instance Bandwidth in the Actions column.To batch downgrade the fixed bandwidths of multiple subscription instances, select the instances and choose in the lower-left corner.
In the dialog box that appears, select Downgrade Bandwidth and click Continue.
On the Downgrade Bandwidth page, decrease the fixed bandwidth value in the Public Bandwidth section.
During a batch downgrade operation, selected instances do not meet requirements are automatically filtered out, such as those that are not associated with static public IP addresses or do not use the pay-by-bandwidth billing method for network usage. You can continue to operate only on the eligible instances, as shown in the following figure.
NoteIf you downgrade the fixed bandwidth of an instance in the classic network to 0 Mbit/s, its static public IP address is retained. If you downgrade the fixed bandwidth of an instance in a virtual private cloud (VPC) to 0 Mbit/s, its static public IP address is released.
You can select Pay-By-Traffic to change the billing method for network usage to pay-by-traffic and specify a peak bandwidth.
Read the notes, and read and select ECS Terms of Service.
Confirm the refund amount and click Downgrade. Follow the on-screen instructions to complete subsequent operations.
NoteAfter you downgrade the fixed bandwidths of instances, you do not need to restart the instances for the new configurations to take effect.
Modify peak bandwidths
Perform the following operations to modify the peak bandwidths of instances that use the pay-by-traffic billing method for network usage.
You are charged based on the actual volume of traffic for instances that use the pay-by-traffic billing method for network usage. If you modify only peak bandwidths, the configuration costs remain unchanged. A peak bandwidth is the bandwidth limit for outbound traffic of an instance to prevent unexpected high costs caused by traffic bursts.
Go to ECS console - Instance.
In the top navigation bar, select the region and resource group of the resource that you want to manage.
Use one of the following methods to modify the peak bandwidths of instances:
To modify the peak bandwidth of a single subscription instance, find the instance and choose
> Upgrade/Downgrade > Change Subscription Instance Bandwidth in the Actions column.To batch modify the peak bandwidths of multiple subscription instances, select the instances and choose in the lower-left corner.
In the dialog box that appears, select Modify Maximum Bandwidth Value and click Continue.
On the page that appears, specify a new peak bandwidth in the Public Bandwidth section.
During a batch operation, selected instances do not meet requirements are automatically filtered out, such as those that are not associated with static public IP addresses or do not use the pay-by-traffic billing method for network usage. You can continue to operate only on the eligible instances, as shown in the following figure.
Read the notes, and read and select ECS Terms of Service.
Click Confirm. Follow the on-screen instructions to complete subsequent operations.
NoteIf you change the billing method for network usage from pay-by-traffic to pay-by-bandwidth, you must pay for the fixed bandwidth upfront.
The first time you upgrade the public bandwidth of an instance in the classic network from 0 Mbit/s to a non-zero value, you must restart the instance in the ECS console or by calling the RebootInstances operation for the new configuration to take effect.
References
DescribeResourcesModification: queries available resources in a zone when you upgrade or downgrade instance types or replace system disks.
ModifyInstanceNetworkSpec: modifies the bandwidth configurations of an ECS instance.
You cannot disassociate a static public IP address from an ECS instance in a VPC. To disassociate the static public IP address from the instance and then associate the IP address with other ECS instances, convert the static public IP address to an EIP.