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Day 13 Of Cloud with AWS: Attach an Elastic Network Interface (ENI) to an EC2 Instance

#100DaysOfCloud challenge using AWS

Today's task:
Attach the Elastic Network Interface "nautilus-eni" to the EC2 instance "nautilus-ec2" in the
us-east-1 AWS region:
Steps followed:
Step 1: Open AWS Console
  1. Login to AWS Management Console.
  2. Select region:
1
us-east-1
from the top-right corner.
Step 2: Open EC2 Dashboard
  1. Search for:
1
EC2
  1. Open the EC2 service.
Step 3: Open Network Interfaces
  1. In the left sidebar, scroll to:
1
Network & Security
  1. Click:
1
Network Interfaces
Step 4: Locate the ENI
  1. Find the network interface named:
1
nautilus-eni
  1. Select its checkbox.
Step 5: Attach the ENI
  1. Click:
1
Actions
  1. Select:
1
Attach
Step 7: Complete Attachment
  1. Click:
1
Attach
AWS will now attach the network interface to the EC2 instance.
Step 8: Verify Status
After attachment:
  1. Refresh the Network Interfaces page.
  2. Verify:
    • Attachment status shows:

What is an Elastic Network Interface (ENI)?

An ENI is a virtual network card in AWS.
It provides:
  • Private IP addresses
  • Public IP association
  • Security groups
  • MAC address
  • Network connectivity for EC2 instances
ENIs are commonly used for:
  • Multi-network setups
  • Failover configurations
  • Network management
  • Security appliances
  • High availability architectures
Any opinions in this article are those of the individual author and may not reflect the opinions of AWS.
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