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Creates a custom set of DHCP options. After you create a DHCP option set, you associate it with a VPC. After you associate a DHCP option set with a VPC, all existing and newly launched instances in the VPC use this set of DHCP options.
The following are the individual DHCP options you can specify. For more information, see DHCP options sets in the Amazon VPC User Guide.
domain-name - If you're using AmazonProvidedDNS in us-east-1, specify
ec2.internal. If you're using AmazonProvidedDNS in any other Region, specify
region.compute.internal. Otherwise, specify a custom domain name. This value
is used to complete unqualified DNS hostnames.
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 option set is associated with a VPC that has instances running operating systems that treat the value as a single domain, specify only one domain name.
domain-name-servers - The IP addresses of up to four DNS servers, or AmazonProvidedDNS.
To specify multiple domain name servers in a single parameter, separate the IP addresses
using commas. To have your instances receive custom DNS hostnames as specified in
domain-name, you must specify a custom DNS server.
ntp-servers - The IP addresses of up to eight Network Time Protocol (NTP)
servers (four IPv4 addresses and four IPv6 addresses).
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 supported. For more information about
NetBIOS node types, see RFC 2132.
ipv6-preferred-lease-time - A value (in seconds, minutes, hours, or years)
for how frequently a running instance with an IPv6 assigned to it goes through DHCPv6
lease renewal. Acceptable values are between 140 and 2147483647 seconds (approximately
68 years). If no value is entered, the default lease time is 140 seconds. If you use
long-term addressing for EC2 instances, you can increase the lease time and avoid
frequent lease renewal requests. Lease renewal typically occurs when half of the lease
time has elapsed.
This is an asynchronous operation using the standard naming convention for .NET 4.5 or higher. For .NET 3.5 the operation is implemented as a pair of methods using the standard naming convention of BeginCreateDhcpOptions and EndCreateDhcpOptions.
Namespace: Amazon.EC2
Assembly: AWSSDK.EC2.dll
Version: 3.x.y.z
public virtual Task<CreateDhcpOptionsResponse> CreateDhcpOptionsAsync( CreateDhcpOptionsRequest request, CancellationToken cancellationToken )
Container for the necessary parameters to execute the CreateDhcpOptions service method.
A cancellation token that can be used by other objects or threads to receive notice of cancellation.
.NET Core App:
Supported in: 3.1
.NET Standard:
Supported in: 2.0
.NET Framework:
Supported in: 4.5