Use DescribeDhcpOptions with an Amazon SDK or CLI

Example 1: To describe your DHCP options

The following describe-dhcp-options example retrieves details about your DHCP options.

aws ec2 describe-dhcp-options

Output:

{
    "DhcpOptions": [
        {
            "DhcpConfigurations": [
                {
                    "Key": "domain-name",
                    "Values": [
                        {
                            "Value": "us-east-2.compute.internal"
                        }
                    ]
                },
                {
                    "Key": "domain-name-servers",
                    "Values": [
                        {
                            "Value": "AmazonProvidedDNS"
                        }
                    ]
                }
            ],
            "DhcpOptionsId": "dopt-19edf471",
            "OwnerId": "111122223333"
        },
        {
            "DhcpConfigurations": [
                {
                    "Key": "domain-name",
                    "Values": [
                        {
                            "Value": "us-east-2.compute.internal"
                        }
                    ]
                },
                {
                    "Key": "domain-name-servers",
                    "Values": [
                        {
                            "Value": "AmazonProvidedDNS"
                        }
                    ]
                }
            ],
            "DhcpOptionsId": "dopt-fEXAMPLE",
            "OwnerId": "111122223333"
        }
    ]
}

For more information, see Working with DHCP Option Sets in the Amazon VPC User Guide.

Example 2: To describe your DHCP options and filter the output

The following describe-dhcp-options example describes your DHCP options and uses a filter to return only DHCP options that have example.com for the domain name server. The example uses the --query parameter to display only the configuration information and ID in the output.

aws ec2 describe-dhcp-options \
    --filters Name=key,Values=domain-name-servers Name=value,Values=example.com \
    --query "DhcpOptions[*].[DhcpConfigurations,DhcpOptionsId]"

Output:

[
    [
        [
            {
                "Key": "domain-name",
                "Values": [
                    {
                        "Value": "example.com"
                    }
                ]
            },
            {
                "Key": "domain-name-servers",
                "Values": [
                    {
                        "Value": "172.16.16.16"
                    }
                ]
            }
        ],
        "dopt-001122334455667ab"
    ]
]

For more information, see Working with DHCP Option Sets in the Amazon VPC User Guide.

Example 1: This example lists your DHCP options sets.

Get-EC2DhcpOption

Output:

DhcpConfigurations                    DhcpOptionsId    Tag
------------------                    -------------    ---
{domain-name, domain-name-servers}    dopt-1a2b3c4d    {}
{domain-name, domain-name-servers}    dopt-2a3b4c5d    {}
{domain-name-servers}                 dopt-3a4b5c6d    {}

Example 2: This example gets configuration details for the specified DHCP options set.

(Get-EC2DhcpOption -DhcpOptionsId dopt-1a2b3c4d).DhcpConfigurations

Output:

Key                    Values
---                    ------
domain-name            {abc.local}
domain-name-servers    {10.0.0.101, 10.0.0.102}