Elastic Network Interface

Last updated: 2019-09-25 15:16:25

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What is ENI?

Elastic Network Interface (ENI) is an elastic network interface bound to CVMs in a VPC, which can be migrated freely among multiple CVMs. It is very useful for configuring management networks and establishing highly reliable network solutions.

ENIs are VPC, availability zone and subnet-specific, and can only be bound to the CVMs in the same availability zone. A CVM can be bound with multiple ENIs. The maximum number of ENIs allowed to be bound to a CVM depends on the CVM's specification.

What are the restrictions for the use of ENIs on CVMs?

Please see ENI Limits section in the "Overview of Use Limits".

What is the basic information of an ENI?

Please see Concepts section in ENI Overview.

How do I create an ENI?

Please see Creating an ENI section in the "ENI Operation Guide".

How do I view the ENI information?

Please see Viewing ENI Information section in the "ENI Operation Guide".

How do I bind an ENI to a CVM instance?

Please see Binding and Configuring ENI section in the "ENI Operation Guide".

How do I configure an ENI in the CVM instance?

Please see Binding and Configuring ENI section in the "ENI Operation Guide".

How do I modify or customize the private IP of an ENI?

VPC-based CVMs support modifying and customizing the private IP of an ENI. Follow the steps below:

  1. Log in to the VPC Console.
  2. Click ENI in the left panel to go to the ENI list page.
  3. Click the ID/Name of an ENI to go to its details page to view its information.
  4. Click IP Management to go to the details page.
  5. Click Assign Private IP, select Manually Enter for IP assignment mode, and then enter the modified IP.
  6. Click OK to complete the operation.

After the modification is made on the console, you also need to modify the configuration file of the ENI. For more information, please see Binding and Configuring ENI section in the "ENI Operation Guide".