26 lines
883 B
Markdown
26 lines
883 B
Markdown
## AWS EC2 - Elastic Network Interfaces
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### Requirements
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* An EC2 instance with network interface
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### Objectives
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A. Create a network interface and attach it to the EC2 instance that already has one network interface
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B. Explain why would anyone use two network interfaces
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### Solution
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A.
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1. Go to EC2 service
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2. Click on "Network Interfaces" under "Network & Security"
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3. Click on "Create network interface"
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4. Provide a description
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5. Choose a subnet (one that is in the AZ as the instance)
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6. Optionally attach a security group and click on "Create network interface"
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7. Click on "Actions" -> "Attach" and choose the instance to attach it to
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8. If you go now to "Instances" page you'll see your instance has two network interfaces
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B.
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1. You can move the second network interface between instances. This allows us to create kind of a failover mechanism between the instances.
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