[ aws . ec2 ]

create-dhcp-options

Description

Creates a set of DHCP options for your VPC. After creating the set, you must associate it with the VPC, causing all existing and new instances that you launch in the VPC to use this set of DHCP options. The following are the individual DHCP options you can specify. For more information about the options, see RFC 2132 .

• domain-name-servers - The IP addresses of up to four domain name servers, or AmazonProvidedDNS. The default DHCP option set specifies AmazonProvidedDNS. If specifying more than one domain name server, specify the IP addresses in a single parameter, separated by commas. To have your instance receive a custom DNS hostname as specified in domain-name , you must set domain-name-servers to a custom DNS server.

• domain-name - If you’re using AmazonProvidedDNS in us-east-1 , specify ec2.internal . If you’re using AmazonProvidedDNS in another Region, specify region.compute.internal (for example, ap-northeast-1.compute.internal ). Otherwise, specify a domain name (for example, ExampleCompany.com ). This value is used to complete unqualified DNS hostnames. Important : Some Linux operating systems accept multiple domain names separated by spaces. However, Windows and other Linux operating systems treat the value as a single domain, which results in unexpected behavior. If your DHCP options set is associated with a VPC that has instances with multiple operating systems, specify only one domain name.

• ntp-servers - The IP addresses of up to four Network Time Protocol (NTP) servers.

• netbios-name-servers - The IP addresses of up to four NetBIOS name servers.

• netbios-node-type - The NetBIOS node type (1, 2, 4, or 8). We recommend that you specify 2 (broadcast and multicast are not currently supported). For more information about these node types, see RFC 2132 .

Your VPC automatically starts out with a set of DHCP options that includes only a DNS server that we provide (AmazonProvidedDNS). If you create a set of options, and if your VPC has an internet gateway, make sure to set the domain-name-servers option either to AmazonProvidedDNS or to a domain name server of your choice. For more information, see DHCP Options Sets in the Amazon Virtual Private Cloud User Guide .

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.

Synopsis

  create-dhcp-options
--dhcp-configurations <value>
[--tag-specifications <value>]
[--dry-run | --no-dry-run]
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]

Options

--dhcp-configurations (list)

A DHCP configuration option.

(structure)

Key -> (string)

Values -> (list)

(string)

Shorthand Syntax:

Key=string,Values=string,string ...

JSON Syntax:

[
  {
    "Key": "string",
    "Values": ["string", ...]
  }
  ...
]

--tag-specifications (list)

The tags to assign to the DHCP option.

(structure)

The tags to apply to a resource when the resource is being created.

ResourceType -> (string)

The type of resource to tag. Currently, the resource types that support tagging on creation are: capacity-reservation | carrier-gateway | client-vpn-endpoint | customer-gateway | dedicated-host | dhcp-options | egress-only-internet-gateway | elastic-ip | elastic-gpu | export-image-task | export-instance-task | fleet | fpga-image | host-reservation | image | import-image-task | import-snapshot-task | instance | internet-gateway | ipv4pool-ec2 | ipv6pool-ec2 | key-pair | launch-template | local-gateway-route-table-vpc-association | placement-group | prefix-list | natgateway | network-acl | network-interface | reserved-instances |route-table | security-group | snapshot | spot-fleet-request | spot-instances-request | snapshot | subnet | traffic-mirror-filter | traffic-mirror-session | traffic-mirror-target | transit-gateway | transit-gateway-attachment | transit-gateway-multicast-domain | transit-gateway-route-table | volume |vpc | vpc-peering-connection | vpc-endpoint (for interface and gateway endpoints) | vpc-endpoint-service (for AWS PrivateLink) | vpc-flow-log | vpn-connection | vpn-gateway .

To tag a resource after it has been created, see CreateTags .

Tags -> (list)

The tags to apply to the resource.

(structure)

Describes a tag.

Key -> (string)

The key of the tag.

Constraints: Tag keys are case-sensitive and accept a maximum of 127 Unicode characters. May not begin with aws: .

Value -> (string)

The value of the tag.

Constraints: Tag values are case-sensitive and accept a maximum of 255 Unicode characters.

Shorthand Syntax:

ResourceType=string,Tags=[{Key=string,Value=string},{Key=string,Value=string}] ...

JSON Syntax:

[
  {
    "ResourceType": "client-vpn-endpoint"|"customer-gateway"|"dedicated-host"|"dhcp-options"|"egress-only-internet-gateway"|"elastic-ip"|"elastic-gpu"|"export-image-task"|"export-instance-task"|"fleet"|"fpga-image"|"host-reservation"|"image"|"import-image-task"|"import-snapshot-task"|"instance"|"internet-gateway"|"key-pair"|"launch-template"|"local-gateway-route-table-vpc-association"|"natgateway"|"network-acl"|"network-interface"|"network-insights-analysis"|"network-insights-path"|"placement-group"|"reserved-instances"|"route-table"|"security-group"|"snapshot"|"spot-fleet-request"|"spot-instances-request"|"subnet"|"traffic-mirror-filter"|"traffic-mirror-session"|"traffic-mirror-target"|"transit-gateway"|"transit-gateway-attachment"|"transit-gateway-connect-peer"|"transit-gateway-multicast-domain"|"transit-gateway-route-table"|"volume"|"vpc"|"vpc-peering-connection"|"vpn-connection"|"vpn-gateway"|"vpc-flow-log",
    "Tags": [
      {
        "Key": "string",
        "Value": "string"
      }
      ...
    ]
  }
  ...
]

--dry-run | --no-dry-run (boolean)

Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is DryRunOperation . Otherwise, it is UnauthorizedOperation .

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See ‘aws help’ for descriptions of global parameters.

Examples

To create a set of DHCP options

The following create-dhcp-options example creates a set of DHCP options that specifies the domain name, the domain name servers, and the NetBIOS node type.

aws ec2 create-dhcp-options \
    --dhcp-configuration \
        "Key=domain-name-servers,Values=10.2.5.1,10.2.5.2" \
        "Key=domain-name,Values=example.com" \
        "Key=netbios-node-type,Values=2"

Output:

{
    "DhcpOptions": {
        "DhcpConfigurations": [
            {
                "Key": "domain-name",
                "Values": [
                    {
                        "Value": "example.com"
                    }
                ]
            },
            {
                "Key": "domain-name-servers",
                "Values": [
                    {
                        "Value": "10.2.5.1"
                    },
                    {
                        "Value": "10.2.5.2"
                    }
                ]
            },
            {
                "Key": "netbios-node-type",
                "Values": [
                    {
                        "Value": "2"
                    }
                ]
            }
        ],
        "DhcpOptionsId": "dopt-06d52773eff4c55f3"
    }
}

Output

DhcpOptions -> (structure)

A set of DHCP options.

DhcpConfigurations -> (list)

One or more DHCP options in the set.

(structure)

Describes a DHCP configuration option.

Key -> (string)

The name of a DHCP option.

Values -> (list)

One or more values for the DHCP option.

(structure)

Describes a value for a resource attribute that is a String.

Value -> (string)

The attribute value. The value is case-sensitive.

DhcpOptionsId -> (string)

The ID of the set of DHCP options.

OwnerId -> (string)

The ID of the AWS account that owns the DHCP options set.

Tags -> (list)

Any tags assigned to the DHCP options set.

(structure)

Describes a tag.

Key -> (string)

The key of the tag.

Constraints: Tag keys are case-sensitive and accept a maximum of 127 Unicode characters. May not begin with aws: .

Value -> (string)

The value of the tag.

Constraints: Tag values are case-sensitive and accept a maximum of 255 Unicode characters.