Step 3: Assign an EIP and Bind It to an ECS

Scenarios

You can assign an EIP and bind it to an ECS so that the ECS can access the Internet.

Note the following when you use EIPs of the Dedicated Load Balancer (5_gray) type:

• In eu-de, EIPs of the Dedicated Load Balancer (5_gray) type cannot be assigned anymore. You can assign EIPs of the BGP (5_bgp) type.
• Existing EIPs of the Dedicated Load Balancer (5_gray) type can be bound to dedicated or shared load balancers.
  • The EIP console cannot be used to bind EIPs to or unbind them from dedicated load balancers.
  • You can use APIs to bind EIPs to or unbind them from dedicated load balancers. For details, see Binding an EIP and Unbinding an EIP.
  • EIPs of this type can be bound to or unbound from shared load balancers using the EIP console or APIs.
  • You are advised to bind BGP EIPs to or unbind them from dedicated load balancers.
• Do not add EIPs of the dedicated load balancer type (5_gray) and other types to the same shared bandwidth. Otherwise, the bandwidth limit policy will not take effect.

Assigning an EIP

1. Log in to the management console.
2. Click in the upper left corner and select the desired region and project.
3. Click in the upper left corner and choose Network > Elastic IP.
4. On the displayed page, click Assign EIP.
5. Set the parameters as prompted.
   Figure 1 Assign EIP
   

   Table 1 Parameter descriptions

   Parameter	Description	Example Value
   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.	eu-de
   EIP Type	Dynamic BGP: Dynamic BGP provides automatic failover and chooses the optimal path when a network connection fails. Mail BGP: EIPs with port 25, 465, or 587 enabled are used for email services. The selected EIP type cannot be changed after the EIP is assigned.	Dynamic BGP
   Billed By	Two options are available: Dedicated: The bandwidth can be used by only one EIP. Shared: The bandwidth can be shared by multiple EIPs.	Dedicated
   Bandwidth	The bandwidth size in Mbit/s.	100
   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
   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
   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

6. Click Create Now.
7. Click Submit.

Binding an EIP

1. On the EIPs page, locate the row that contains the target EIP, and click Bind.
2. Select the instance that you want to bind the EIP to.
   Figure 2 Bind EIP
   
3. Click OK.

An IPv6 client on the Internet can access the ECS that has an EIP bound in a VPC. For details, see How Does an IPv6 Client on the Internet Access the ECS That Has an EIP Bound in a VPC?

Follow-Up Procedure

After an ECS with an EIP bound is created, the system generates a domain name in the format of ecs-xx-xx-xx-xx.compute.xxx.com for the EIP by default. xx-xx-xx-xx indicates the EIP, and xxx indicates the domain name of the cloud service provider. You can use the domain name to access the ECS.