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AWS Getting Started - Create and Add a Secondary NIC

AWS Getting Started - Create and Add a Secondary NIC

Apr 13, 2023

If during instance creation you are not able to add a secondary Network Interface (necessary for high availability). the second network interface can be added after instance creation. 

From the EC2 dashboard, scroll down the left panel to Network & Security.
Select Network Interface.
Click Create Network Interface.

Next, create the network interface. 

  1. Description - Provide a description to describe your network interface.

  2. Subnet - Select the desired subnet to match the instance it will be assigned to.

  3. Private IPv4 address - Select auto-assign.

  4. Security groups - Select the security group assigned to your instance.

  5. Tags - Create any tags that you want to be assigned to your network interface.

  6. Once configuration is complete, click Create network interface.

Select the network interface created. Click Actions > Attach. 
Select the instance you wish to attach the additional NIC. Click Attach.
To verify the network interface has been added, select your instance from Instances in the EC2 dashboard.
Scroll down the Networking tab and look for Network Interfaces.

 

If two interfaces are present, the task is complete.