Assigning an EIP

1. Go to the Buy EIP page.
2. Configure parameters as prompted.

   Table 1 Parameter descriptions

   Item	Parameter	Description	Example Value
   Basic Configuration	Billing Mode	The following options are available: Yearly/Monthly: You pay upfront for the amount of time you expect to use the instance. You need to make sure you have a valid payment method configured first. Pay-per-use: You can start using the EIP first and then pay as you go. You are billed based on the EIP usage duration (by bandwidth) or used traffic (by traffic).	Pay-per-use
   Basic Configuration	Region	The desired region. Resources in different regions cannot communicate with each other over internal networks. For low network latency and quick resource access, select the region nearest to where your services will be accessed. The region selected for the EIP is its geographical location.	-
   Bandwidth Details	EIP Type	Dynamic BGP: Dynamic BGP provides automatic failover and chooses the optimal path when a network connection fails.	Dynamic BGP
   Bandwidth Details	Billed By	How the EIP bandwidth will be billed. This parameter is available only when you set Billing Mode to Pay-per-use. Bandwidth: You specify a maximum bandwidth and pay for the amount of time you use the bandwidth. This is suitable for scenarios with heavy or stable traffic. Traffic: You specify a maximum bandwidth and pay for the total outbound traffic you use. This is suitable for scenarios with light or sharply fluctuating traffic. Shared Bandwidth: The bandwidth can be shared by multiple EIPs and is suitable for scenarios with staggered traffic.	Bandwidth
   Bandwidth Details	Bandwidth (Mbit/s)	The bandwidth size in Mbit/s.	100
   Bandwidth Details	Bandwidth Name	The name of the bandwidth. The name: Can contain 1 to 64 characters. Can contain letters, digits, underscores (_), hyphens (-), and periods (.).	bandwidth
   DDoS Protection	DDoS Protection	Cloud Native Anti-DDoS Basic Cloud Native Anti-DDoS Basic provides up to a certain amount (for example, less than 5 Gbit/s) of DDoS mitigation capacity for free. The actual thresholds are displayed on the console. If the attack to an EIP exceeds the threshold, the EIP will be blocked.	-
   EIP Details	EIP Name	The name of the EIP. The name: Can contain 1 to 64 characters. Can contain letters, digits, underscores (_), hyphens (-), and periods (.).	eip-test
   EIP Details	Enterprise Project	The enterprise project that the EIP belongs to. An enterprise project facilitates project-level management and grouping of cloud resources and users. The default project is default. For details about creating and managing enterprise projects, see the Enterprise Management User Guide.	default
   EIP Details	Tag	Tags help you quickly identify, organize, and search for your EIPs. For details, see Managing EIP Tags.	Key: Ipv4_key1 Value: 3005eip
   Monitoring	Monitoring	Basic monitoring is enabled by default. You can use the management console or APIs provided by Cloud Eye to query the metrics and alarms generated for the EIP and bandwidth.	-
   Purchase Details	Required Duration	The duration for which the EIP will be used. The duration must be specified if the Billing Mode is set to Yearly/Monthly.	1 month
   Purchase Details	Auto-renew	Whether to select Auto-renew. You can select it if the Billing Mode is set to Yearly/Monthly. The auto-renewal period is determined by the required duration. Monthly subscription: The subscription is renewed every month. Yearly subscription: The subscription is renewed each year.	-
   Purchase Details	Quantity	The number of EIPs you want to assign. The quantity must be specified if the Billing Mode is set to Pay-per-use.	1

   

   • If you are buying an EIP billed on a pay-per-use basis and you want to use a shared bandwidth, you can only select an existing shared bandwidth from the Bandwidth Name drop-down list. If there is no shared bandwidth, create one first.
   • A dedicated bandwidth cannot be changed to a shared bandwidth and vice versa. However, you can purchase a shared bandwidth for pay-per-use EIPs.
     • Add an EIP to a shared bandwidth and then the EIP will use the shared bandwidth.
     • Remove the EIP from the shared bandwidth and then the EIP will use the dedicated bandwidth.
3. Click Next.
4. On the confirmation page:

   • If you select Pay-per-use for Billing Mode, click Submit.
   • If you select Yearly/Monthly for Billing Mode, click Pay Now.

     On the payment page, confirm the order information, and click Confirm.

If you click Buy Shared Bandwidth when you buy an EIP, you also need to pay for the bandwidth.

If you want to retrieve an EIP that you have released within seven days (inclusive) or assign a specific EIP, you can use APIs.

You can set the value of ip_address to the one that you want to assign. For details, see Elastic IP API Reference.

• If the EIP has been assigned to another user, you will fail to assign your required EIP.
• APIs cannot be used to assign the yearly/monthly EIP that you have released or assign a specific yearly/monthly EIP.
• The management console does not support assigning a specific EIP.