Dynamically retrieve all EC2 instance types ENI limits (per region)

get.sh

aws ec2 describe-instance-types \
  | jq '[
    .InstanceTypes[] | {
        type: .InstanceType,
        maxInterfaces: .NetworkInfo.MaximumNetworkInterfaces,
        maxIPV4PerInterface: .NetworkInfo.Ipv4AddressesPerInterface,
        maxIPV6PerInterface: .NetworkInfo.Ipv6AddressesPerInterface
      }
     ]'

output.json

# Here is a truncated example of the list being returned
[
  {
    "type": "x1e.xlarge",
    "maxInterfaces": 3,
    "maxIPV4PerInterface": 10,
    "maxIPV6PerInterface": 10
  },
  {
    "type": "r5n.large",
    "maxInterfaces": 3,
    "maxIPV4PerInterface": 10,
    "maxIPV6PerInterface": 10
  },
  {
    "type": "d2.4xlarge",
    "maxInterfaces": 8,
    "maxIPV4PerInterface": 30,
    "maxIPV6PerInterface": 30
  }
]