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IPv6InterfaceProperties.Mtu Property

Gets the maximum transmission unit (MTU) for this network interface.

Namespace:  System.Net.NetworkInformation
Assembly:  System (in System.dll)
public abstract int Mtu { get; }

Property Value

Type: System.Int32
An Int64 value that specifies the MTU.

The MTU of a network interface is the largest packet that can be transmitted. It is measured in octets (8-bit bytes).

The following code example gets an IPv6InterfaceProperties object and displays its data.

public static void DisplayIPv6NetworkInterfaces()
    NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
    IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
    Console.WriteLine("IPv6 interface information for {0}.{1}",
       properties.HostName, properties.DomainName);

    int count = 0;

    foreach (NetworkInterface adapter in nics)
        // Only display informatin for interfaces that support IPv6. 
        if (adapter.Supports(NetworkInterfaceComponent.IPv6) == false)


        // Underline the description.

        IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
        // Try to get the IPv6 interface properties.
        IPv6InterfaceProperties p = adapterProperties.GetIPv6Properties();

        if (p == null)
            Console.WriteLine("No IPv6 information is available for this interface.");
        // Display the IPv6 specific data.
        Console.WriteLine("  Index ............................. : {0}", p.Index);
        Console.WriteLine("  MTU ............................... : {0}", p.Mtu);

    if (count == 0)
        Console.WriteLine("  No IPv6 interfaces were found.");


.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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