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PingOptions.Ttl Property

Gets or sets the number of routing nodes that can forward the Ping data before it is discarded.

Namespace:  System.Net.NetworkInformation
Assembly:  System (in System.dll)

public int Ttl { get; set; }

Property Value

Type: System.Int32
An Int32 value that specifies the number of times the Ping data packets can be forwarded. The default is 128.

ExceptionCondition
ArgumentOutOfRangeException

The value specified for a set operation is less than or equal to zero.

As gateways and routers transmit packets through a network, they decrement the current Time-to-Live (TTL) value found in the packet header. If the TTL value reaches zero, the packet is deemed undeliverable and is discarded. This option is useful if you want to test the number of routers and gateways used to transmit the data.

The following code example demonstrates setting the value of this property using a PingOptions constructor, and then displaying the value.

// Set options for transmission: 
// The data can go through 64 gateways or routers 
// before it is destroyed, and the data packet 
// cannot be fragmented.
PingOptions options = new PingOptions (64, true);

Console.WriteLine ("Time to live: {0}", options.Ttl);
Console.WriteLine ("Don't fragment: {0}", options.DontFragment);
// Set options for transmission:
// The data can go through 64 gateways or routers
// before it is destroyed, and the data packet
// cannot be fragmented.
PingOptions* options = new PingOptions (64, true);

Console::WriteLine (S"Time to live: {0}", __box(options->Ttl));
Console::WriteLine (S"Don't fragment: {0}", __box(options->DontFragment));

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0

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