Binding or Unbinding an EIP

Scenarios

After EIPs are assigned, you can bind them to resources such as ECSs, virtual IP addresses, NAT gateways, and load balancers to allow them to access the Internet.

If your instance no longer requires an EIP, you can unbind the EIP from it. To bind an EIP to a new instance, you need to first unbind it from the current one.

Binding an EIP to an Instance

Bind EIPs to resources such as ECSs, virtual IP addresses, NAT gateways, and load balancers to allow them to access the Internet.

Binding an EIP to an ECS or Virtual IP Address

1. In the EIP list, locate the row that contains the EIP, and click Bind.
2. Select the instance.
3. Click OK.
   

   To bind an instance to an EIP:

   • If the instance is an ECS:
     • The ECS must be in the running or stopped status.
     • The ECS must be in the same region as that of the EIP.
     • The ECS has no EIP bound to it.
   • If the instance is a virtual IP address:
     • The virtual IP address must be in the same region as that of the EIP.
     • The virtual IP address must be in the available or assigned status.

Binding an EIP to a NAT Gateway

If you want to bind a NAT gateway to an EIP, the NAT gateway must be in the same region as that of the EIP. After an EIP is bound to a NAT gateway, ECSs associated with this gateway can share the EIP to access the Internet or provide services accessible from the Internet.

You can bind an EIP to a NAT gateway by configuring SNAT and DNAT rules for the gateway. Sections "Allowing a Private Network to Access the Internet Using SNAT" and "Allowing Internet Users to Access a Service in a Private Network Using DNAT" in the NAT Gateway User Guide.

Binding an EIP to a Load Balancer

If you want to bind a load balancer to an EIP, the load balancer must be in the same region as that of the EIP. Then, the load balancer can receive requests over the Internet. For details, see "Binding or Unbinding an IPv4 EIP" in the Elastic Load Balance User Guide.

Unbinding an EIP from an Instance

If an EIP is no longer required, you can unbind it from your instance.

Unbinding an EIP from an ECS or Virtual IP Address

Unbinding a single EIP

1. Log in to the management console.
2. Click in the upper left corner and choose Network > Elastic IP.
3. On the displayed page, locate the row that contains the target EIP, and click Unbind in the Operation column.

   A confirmation dialog box is displayed.

4. Click Yes in the displayed dialog box.

   In the EIP list, the target EIP has no associated instance.

Unbinding multiple EIPs at a time

1. Log in to the management console.
2. Click in the upper left corner and choose Network > Elastic IP.
3. On the displayed page, select the EIPs to be unbound.
4. In the upper left corner of the EIP list, click Unbind.

   A confirmation dialog box is displayed.

5. Click Yes in the displayed dialog box.

   In the EIP list, the target EIPs have no associated instances.

Unbinding an EIP from a NAT Gateway

You can unbind an EIP from a NAT gateway by deleting the SNAT and DNAT rules. For details, see sections "Deleting an SNAT Rule" and "Deleting a DNAT Rule" in the NAT Gateway User Guide.

Unbinding an EIP from a Load Balancer

You can unbind an EIP from a load balancer on the ELB console. For details, see section "Binding or Unbinding an IPv4 EIP" in the Elastic Load Balance User Guide.