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Network interface basics. You can create a network interface, attach it to an instance, detach it from an instance, and attach it to another instance. The attributes of a network interface follow it as it's attached or detached from an instance and reattached to another instance.
Jul 31, 2020 · Essentially, ENIs are virtual network cards you can attach to your EC2 instances. They are used to enable network connectivity for your instances, and having more than one of them connected to your instance allows it to communicate on two different subnets.
Decoupling the ENI from the EC2 instance allows you far more flexibility. You can connect several ENIs to the same EC2 instance and be attached to different subnets, for example: ENI A connected to a public-facing subnet. ENI B connected to an internal private subnet.
You can launch an EC2 instance in one VPC and attach a secondary ENI from another VPC (but in the same Availability Zone) to the instance. This enables you to create multi-homed instances across VPCs with different networking and security configurations.
Network interfaces with prefixes are supported with instances built on the AWS Nitro System. Prefixes for network interfaces are limited to IPv6 addresses and private IPv4 addresses. The maximum number of IP addresses that you can assign to a network interface depends on the instance type.
Dec 21, 2011 · Today we are adding additional flexibility to EC2 instances running in the Virtual Private Cloud. First, we are teasing apart the IP addresses (and important attributes associated with them) from the EC2 instances and calling the resulting entity an ENI, or Elastic Network Interface.
Apr 6, 2021 · In AWS, we have Virtual Network Interface known as Elastic Network Interface (ENI). When you run an EC2 instance, a default Network Interface eth0 is assigned to it. It handles all...
Feb 7, 2024 · Understanding AWS Networking Interfaces: EFA, ENA, and ENI - A Guide to Making the Right Choice. In the world of cloud computing, selecting the right networking interface is crucial for optimizing performance and cost-effectiveness.
Apr 3, 2024 · AWS ENI, short for Elastic Network Interface, is a virtual network interface that you can attach to an Amazon EC2 instance in your AWS environment. It acts as a gateway between your EC2 instance and the rest of your AWS infrastructure, providing a secure and reliable way for your instances to communicate with each other and the outside world.
Jan 21, 2024 · In the virtual world of AWS, the Elastic Network Interface (ENI) is akin to a virtual network card. It's a logical networking component in a Virtual Private Cloud (VPC) that represents how our instances (virtual servers) connect to the network.
