Binding and Unbinding an EIP

Precautions

• After you bind an EIP to a DDM instance with load balancing enabled, the system will randomly select a read/write node of the instance and bind the EIP to the node. In this case, load balancing may take effect. So, do not bind any EIP for a DDM instance with load balancing enabled.

  In the upper right corner of the DDM console, you can choose Service Tickets > Create Service Ticket to enable load balancing for your DDM instance.

• If a DDM instance has already been bound with an EIP, you must unbind the EIP from the instance first before binding a new EIP to it.
• If a DDM instance contains both read-only and read/write groups, you can bind an EIP to a node of the read/write groups.

Prerequisites

You have applied for an EIP in the VPC.

Binding an EIP to an Instance

1. Log in to the DDM console.
2. On the Instances page, select the instance that you want to bind an EIP for and click its name.
3. In the Instance Information area, click Bind next to EIP.
4. In the displayed dialog box, all EIPs in the unbound status are listed. Select the required EIP and click OK.

   If no available EIPs are displayed, click View EIP and obtain an EIP.

   Figure 1 Binding an EIP
   

5. On the Basic Information page, view the EIP that has been bound to the instance.

Unbinding an EIP from an Instance

1. Log in to the DDM console.
2. On the Instances page, select the instance that you want to bind an EIP for and click its name.
3. In the Instance Information area, click Unbind.
4. In the displayed dialog box, click Yes to unbind the EIP.
5. On the Basic Information page, check whether the EIP is unbound.