SuffixOrigin Enum

Definition

Specifies how an IP address host suffix was located.

C#
public enum SuffixOrigin
Inheritance
SuffixOrigin

Fields

Name Value Description
Other 0

The suffix was located using an unspecified source.

Manual 1

The suffix was manually configured.

WellKnown 2

The suffix is a well-known suffix. Well-known suffixes are specified in standard-track Request for Comments (RFC) documents and assigned by the Internet Assigned Numbers Authority (Iana) or an address registry. Such suffixes are reserved for special purposes.

OriginDhcp 3

The suffix was supplied by a Dynamic Host Configuration Protocol (DHCP) server.

LinkLayerAddress 4

The suffix is a link-local suffix.

Random 5

The suffix was randomly assigned.

Examples

The following code example displays prefix and suffix information for unicast addresses.

C#
public static void DisplayUnicastAddresses()
{
    Console.WriteLine("Unicast Addresses");
    NetworkInterface[] adapters  = NetworkInterface.GetAllNetworkInterfaces();
    foreach (NetworkInterface adapter in adapters)
    {
        IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
        UnicastIPAddressInformationCollection uniCast = adapterProperties.UnicastAddresses;
        if (uniCast.Count >0)
        {
            Console.WriteLine(adapter.Description);
            string lifeTimeFormat = "dddd, MMMM dd, yyyy  hh:mm:ss tt";
            foreach (UnicastIPAddressInformation uni in uniCast)
            {
                DateTime when;

                Console.WriteLine("  Unicast Address ......................... : {0}", uni.Address);
                Console.WriteLine("     Prefix Origin ........................ : {0}", uni.PrefixOrigin);
                Console.WriteLine("     Suffix Origin ........................ : {0}", uni.SuffixOrigin);
                Console.WriteLine("     Duplicate Address Detection .......... : {0}",
                    uni.DuplicateAddressDetectionState);

                // Format the lifetimes as Sunday, February 16, 2003 11:33:44 PM
                // if en-us is the current culture.

                // Calculate the date and time at the end of the lifetimes.
                when = DateTime.UtcNow + TimeSpan.FromSeconds(uni.AddressValidLifetime);
                when = when.ToLocalTime();
                Console.WriteLine("     Valid Life Time ...................... : {0}",
                    when.ToString(lifeTimeFormat,System.Globalization.CultureInfo.CurrentCulture)
                );
                when = DateTime.UtcNow + TimeSpan.FromSeconds(uni.AddressPreferredLifetime);
                when = when.ToLocalTime();
                Console.WriteLine("     Preferred life time .................. : {0}",
                    when.ToString(lifeTimeFormat,System.Globalization.CultureInfo.CurrentCulture)
                );

                when = DateTime.UtcNow + TimeSpan.FromSeconds(uni.DhcpLeaseLifetime);
                when = when.ToLocalTime();
                Console.WriteLine("     DHCP Leased Life Time ................ : {0}",
                    when.ToString(lifeTimeFormat,System.Globalization.CultureInfo.CurrentCulture)
                );
            }
            Console.WriteLine();
        }
    }
}

Remarks

IP addresses are divided into two parts: the prefix and the suffix. The address prefix identifies the network portion of an IP address, and the address suffix identifies the host portion. Prefixes are assigned by global authorities, and suffixes are assigned by local system administrators.

This enumeration is used by the UnicastIPAddressInformation class. Instances of this class are returned when you retrieve the unicast address information for a NetworkInterface object.

Applies to

Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0, 2.1