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AWS::EC2::NetworkInterface

  • Elastic Network Interface (ENI)
  • Represents a Network Card
  • It can be attached to an EC2 instance

  • ENI can be created independently and attached to EC2 instances on the fly

  • IP Types

  • Private IP: used within the private network
  • Public IP: unique across all web
  • Elastic IP: a static public ip. You can only have 5 elastic ip in your aws account

Properties

Type: AWS::EC2::NetworkInterface
Properties:
  ConnectionTrackingSpecification:
    ConnectionTrackingSpecification
  Description: String
  EnablePrimaryIpv6: Boolean
  GroupSet:
    - String
  InterfaceType: String
  Ipv4PrefixCount: Integer
  Ipv4Prefixes:
    - Ipv4PrefixSpecification
  Ipv6AddressCount: Integer
  Ipv6Addresses:
    - InstanceIpv6Address
  Ipv6PrefixCount: Integer
  Ipv6Prefixes:
    - Ipv6PrefixSpecification
  PrivateIpAddress: String
  PrivateIpAddresses:
    - PrivateIpAddressSpecification
  SecondaryPrivateIpAddressCount: Integer
  SourceDestCheck: Boolean
  SubnetId: String
  Tags:
    - Tag

InterfaceType

  • Enhanced Networking (SR-IOV)

  • Elastic Network Adapter (ENA)

  • Higher bandwight, higher PPS (packet per second), lower latency
  • Up to 100 Gbps

  • Legacy ENA: Intel 82599 VG (10 Gbps)

  • Elastic Fabric Adapter (EFA)

  • Improved ENA
  • Linux only
  • Inter-node communication
  • Leverages Message Passing Interface (MPI): bypasses the underlying linux OS
  • Low latency, reliable transport

PrivateIpAddress

  • Primary Private IP (IPv4) + more secondaries (optional)