AWS Documentation » AWS CloudFormation » User Guide » Template Reference » AWS Resource and Property Types Reference » Amazon EC2 Resource Types Reference » AWS::EC2::DHCPOptions

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AWS::EC2::DHCPOptions

Creates a set of DHCP options for your VPC.

For more information, see CreateDhcpOptions in the Amazon EC2 API Reference.

Syntax

To declare this entity in your AWS CloudFormation template, use the following syntax:

JSON

{
   "Type" : "AWS::EC2::DHCPOptions",
   "Properties" : {
      "DomainName" : String,
      "DomainNameServers" : [ String, ... ],
      "NetbiosNameServers" : [ String, ... ],
      "NetbiosNodeType" : Number,
      "NtpServers" : [ String, ... ],
      "Tags" : [ Resource Tag, ... ]
   }
}     

YAML

Type: AWS::EC2::DHCPOptions
Properties:
  DomainName: String
  DomainNameServers:
    - String
  NetbiosNameServers:
    - String
  NetbiosNodeType: Number
  NtpServers:
    - String
  Tags:
    -Resource Tag

Properties

DomainName

A domain name of your choice.

Required: Conditional; see note.

Type: String

Update requires: Replacement

Example: "example.com"

DomainNameServers

The IP (IPv4) address of a domain name server. You can specify up to four addresses.

Required: Conditional; see note.

Type: List of String values

Update requires: Replacement

Example: "DomainNameServers" : [ "10.0.0.1", "10.0.0.2" ]

Example: To preserve the order of IP addresses, specify a comma delimited list as a single string: "DomainNameServers" : [ "10.0.0.1, 10.0.0.2" ]

NetbiosNameServers

The IP address (IPv4) of a NetBIOS name server. You can specify up to four addresses.

Required: Conditional; see note.

Type: List of String values

Update requires: Replacement

Example: "NetbiosNameServers" : [ "10.0.0.1", "10.0.0.2" ]

Example: To preserve the order of IP addresses, specify a comma delimited list as a single string: "NetbiosNameServers" : [ "10.0.0.1, 10.0.0.2" ]

NetbiosNodeType

An integer value indicating the NetBIOS node type:

• 1: Broadcast ("B")

• 2: Point-to-point ("P")

• 4: Mixed mode ("M")

• 8: Hybrid ("H")

For more information about these values and about NetBIOS node types, see RFC 2132, RFC 1001, and RFC 1002. We recommend that you use only the value 2 at this time (broadcast and multicast are not currently supported).

Required: Required if NetBiosNameServers is specified; optional otherwise.

Type: List of numbers

Update requires: Replacement

Example: "NetbiosNodeType" : 2

NtpServers

The IP address (IPv4) of a Network Time Protocol (NTP) server. You can specify up to four addresses.

Required: Conditional; see note.

Type: List of String values

Update requires: Replacement

Example: "NtpServers" : [ "10.0.0.1" ]

Example: To preserve the order of IP addresses, specify a comma delimited list as a single string: "NtpServers" : [ "10.0.0.1, 10.0.0.2" ]

Tags

An arbitrary set of tags (key–value pairs) for this resource.

Required: No

Type: Resource Tag

Update requires: No interruption.

Conditional Properties

At least one of the following properties must be specified:

• DomainNameServers

• NetbiosNameServers

• NtpServers

After this condition has been fulfilled, the rest of these properties are optional.

If you specify NetbiosNameServers, then NetbiosNodeType is required.

Return Values

Ref

When the logical ID of this resource is provided to the Ref intrinsic function, Ref returns the resource name.

For more information about using the Ref function, see Ref.

Example

JSON

{
   "AWSTemplateFormatVersion" : "2010-09-09",
   "Resources" : {
      "myDhcpOptions" : {
         "Type" : "AWS::EC2::DHCPOptions",
         "Properties" : {
            "DomainName" : "example.com",
            "DomainNameServers" : [ "AmazonProvidedDNS" ],
            "NtpServers" : [ "10.2.5.1" ],
            "NetbiosNameServers" : [ "10.2.5.1" ],
            "NetbiosNodeType" : 2,
            "Tags" : [ { "Key" : "foo", "Value" : "bar" } ]
         }
      }
   }
}

YAML

AWSTemplateFormatVersion: "2010-09-09"
Resources: 
  myDhcpOptions: 
    Type: AWS::EC2::DHCPOptions
    Properties: 
      DomainName: example.com
      DomainNameServers: 
        - AmazonProvidedDNS
      NtpServers: 
        - 10.2.5.1
      NetbiosNameServers: 
        - 10.2.5.1
      NetbiosNodeType: 2
      Tags: 
        - 
          Key: foo
          Value: bar

See Also

• CreateDhcpOptions in the Amazon EC2 API Reference

• Using Tags in the Amazon Elastic Compute Cloud User Guide.

• RFC 2132 - DHCP Options and BOOTP Vendor Extensions, Network Working Group, 1997

• RFC 1001 - Protocol Standard for a NetBIOS Service on a TCP/UDP Transport: Concepts and Methods, Network Working Group, 1987

• RFC 1002 - Protocol Standard for a NetBIOS Service on a TCP/UDP Transport: Detailed Specifications, Network Working Group, 1987