Adjust the peak bandwidth and billing method of an Elastic IP Address (EIP) attached to a VPC-type ECS instance.
Procedure
Log in to the ECS console.
In the left-side navigation pane, choose .
In the upper-left corner of the page, select a region and resource group.
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Find the target instance. In the Actions column, choose .

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Modify the EIP based on its billing method.
Pay-as-you-go billing for EIP
On the EIP | Modify Configuration page, configure the following parameters, select the Terms of Service, and click Buy Now.
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Peak Bandwidth: Set the peak bandwidth. Cannot be 0 Mbps.
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Traffic: Select Pay-by-traffic or Pay-by-bandwidth.
NoteIf you only modify the peak bandwidth, the change takes effect immediately. If you change the billing method for traffic:
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The billing method change takes effect after 00:00 the next day.
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Before the new billing method takes effect, you cannot submit other modification requests.
Subscription billing method for EIPs
On the EIP (Subscription) International | Modify Configuration page, set the bandwidth, select the Terms of Service, and click Buy Now.
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> Upgrade/Downgrade > Modify EIP Bandwidth