Assigning an EIP

Scenarios

Assign an EIP for a cloud resource you want to make it accessible over the Internet.

If you want to assign an EIP that you have released or assign a specific EIP, you can use APIs. When assigning an EIP, set the value of ip_address to the IP address 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.
The management console does not support assigning a specific EIP.

Procedure

Log in to the management console.
Click in the upper left corner and select the desired region and project.
Click in the upper left corner and choose Networking > Elastic IP.
On the displayed page, click Buy EIP.

Set the parameters as prompted.

**Table 1** Parameter descriptions
Parameter	Description	Example Value
Billing Mode	The following billing modes are available: Yearly/Monthly Pay-per-use	Pay-per-use
Region	Regions are geographic areas that are physically isolated from each other. The networks inside different regions are not connected to each other, so resources cannot be shared across different regions. For lower network latency and faster access to your resources, select the region nearest you. The region selected for the EIP is its geographical location.	-
EIP Type	Dynamic BGP: Dynamic BGP provides automatic failover and chooses the optimal path when a network connection fails.	Dynamic BGP
Billed By	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 traffic you use. This is suitable for scenarios with light or sharply fluctuating traffic. Shared Bandwidth: The bandwidth can be shared by multiple EIPs. This is suitable for scenarios with staggered traffic.	Bandwidth
Bandwidth	The bandwidth size in Mbit/s.	100
DDoS Protection	Cloud Native Anti-DDoS Basic Cloud Native Anti-DDoS Basic provides up to 5 Gbit/s of DDoS mitigation capacity. If the attack to an EIP exceeds 5 Gbit/s, the EIP will be blocked.	-
EIP Name	The EIP name.	eip-test
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 name of the default project is default. For details about creating and managing enterprise projects, see the Enterprise Management User Guide.	default
Advanced Settings	Click the drop-down arrow to configure parameters, including the bandwidth name and tag.	-
Bandwidth Name	The name of the bandwidth.	bandwidth
Tag	The EIP tags. Each tag contains a key and value pair. The tag key and value must meet the requirements listed in Table 2.	Key: Ipv4_key1 Value: 3005eip
Monitoring	Used to monitor the EIP and 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.	-
Required Duration	The duration for which the purchased EIP will use. The duration must be specified if the Billing Mode is set to Yearly/Monthly.	1 month
Quantity	The number of EIPs you want to purchase. The quantity must be specified if the Billing Mode is set to Pay-per-use.	1
Quantity	The number of EIPs you want to assign.	1

**Table 2** EIP tag requirements
Parameter	Requirement	Example Value
Key	Cannot be left blank. Must be unique for each EIP. Can contain a maximum of 36 characters. Can contain only the following character types: Uppercase letters Lowercase letters Digits Special characters, including hyphens (-) and underscores (_)	Ipv4_key1
Value	Can contain a maximum of 43 characters. Can contain only the following character types: Uppercase letters Lowercase letters Digits Special characters, including hyphens (-) and underscores (_)	3005eip

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 are no shared bandwidths to select, purchase a shared bandwidth 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.
- After an EIP is added to a shared bandwidth, the EIP will use the shared bandwidth.
- After an EIP is removed from the shared bandwidth, the EIP will use the dedicated bandwidth.