DuplicateAddressDetectionState DuplicateAddressDetectionState DuplicateAddressDetectionState DuplicateAddressDetectionState Enum

Definizione

Specifica lo stato corrente di un indirizzo IP.Specifies the current state of an IP address.

public enum class DuplicateAddressDetectionState
public enum DuplicateAddressDetectionState
type DuplicateAddressDetectionState = 
Public Enum DuplicateAddressDetectionState
Ereditarietà
DuplicateAddressDetectionStateDuplicateAddressDetectionStateDuplicateAddressDetectionStateDuplicateAddressDetectionState

Campi

Deprecated Deprecated Deprecated Deprecated 3

L'indirizzo è valido ma è consigliabile non utilizzarlo nelle applicazioni perché il lease di durata sta per scadere.The address is valid, but it is nearing its lease lifetime and should not be used by applications.

Duplicate Duplicate Duplicate Duplicate 2

L'indirizzo non è univoco.The address is not unique. Questo indirizzo non deve essere assegnato all'interfaccia di rete.This address should not be assigned to the network interface.

Invalid Invalid Invalid Invalid 0

L'indirizzo non è valido.The address is not valid. Un indirizzo non valido è scaduto e non è più assegnato a un'interfaccia; le applicazioni non devono inviare pacchetti di dati a questo indirizzo.A nonvalid address is expired and no longer assigned to an interface; applications should not send data packets to it.

Preferred Preferred Preferred Preferred 4

L'indirizzo è valido e può essere utilizzato senza restrizioni.The address is valid and its use is unrestricted.

Tentative Tentative Tentative Tentative 1

La valutazione della procedura per il rilevamento degli indirizzi duplicati non è stata completata in modo corretto per questo indirizzo.The duplicate address detection procedure's evaluation of the address has not completed successfully. Questo indirizzo non deve essere utilizzato dalle applicazioni perché non è ancora valido e i pacchetti inviati a questo indirizzo verranno quindi eliminati.Applications should not use the address because it is not yet valid and packets sent to it are discarded.

Esempi

Nell'esempio di codice seguente vengono determinate le informazioni sull'indirizzo unicast.The following code example determines unicast address information.

void DisplayUnicastAddresses()
{
   Console::WriteLine( "Unicast Addresses" );
   array<NetworkInterface^>^adapters = NetworkInterface::GetAllNetworkInterfaces();
   System::Collections::IEnumerator^ myEnum17 = adapters->GetEnumerator();
   while ( myEnum17->MoveNext() )
   {
      NetworkInterface ^ adapter = safe_cast<NetworkInterface ^>(myEnum17->Current);
      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";
         System::Collections::IEnumerator^ myEnum18 = uniCast->GetEnumerator();
         while ( myEnum18->MoveNext() )
         {
            UnicastIPAddressInformation ^ uni = safe_cast<UnicastIPAddressInformation ^>(myEnum18->Current);
            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( (double)uni->AddressValidLifetime );
            when = when.ToLocalTime();
            Console::WriteLine( "     Valid Life Time ...................... : {0}", 
               when.ToString( lifeTimeFormat, System::Globalization::CultureInfo::CurrentCulture ) );
            when = DateTime::UtcNow + TimeSpan::FromSeconds( (double)uni->AddressPreferredLifetime );
            when = when.ToLocalTime();
            Console::WriteLine( "     Preferred life time .................. : {0}", 
               when.ToString( lifeTimeFormat, System::Globalization::CultureInfo::CurrentCulture ) );
            when = DateTime::UtcNow + TimeSpan::FromSeconds( (double)uni->DhcpLeaseLifetime );
            when = when.ToLocalTime();
            Console::WriteLine( "     DHCP Leased Life Time ................ : {0}", 
               when.ToString( lifeTimeFormat, System::Globalization::CultureInfo::CurrentCulture ) );
         }
         Console::WriteLine();
      }
   }
}
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();
        }
    }
}
Public Shared Sub DisplayUnicastAddresses() 

    Console.WriteLine("Unicast Addresses")
    Dim adapters As NetworkInterface() = NetworkInterface.GetAllNetworkInterfaces()
    Dim adapter As NetworkInterface
    For Each adapter In  adapters
        Dim adapterProperties As IPInterfaceProperties = adapter.GetIPProperties()
        Dim uniCast As UnicastIPAddressInformationCollection = adapterProperties.UnicastAddresses
        If uniCast.Count > 0 Then
            Console.WriteLine(adapter.Description)
            Dim lifeTimeFormat As String = "dddd, MMMM dd, yyyy  hh:mm:ss tt"
            Dim uni As UnicastIPAddressInformation
            For Each uni In  uniCast
                Dim [when] As DateTime
                
                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))
            Next uni
            Console.WriteLine()
        End If
    Next adapter

End Sub

Commenti

Per garantire che tutte le interfacce in una rete dispongano di un indirizzo univoco, l'host dell'interfaccia è responsabile dell'esecuzione di un algoritmo di rilevamento degli indirizzi duplicati sugli indirizzi unicast.To help ensure that all interfaces on a network have a unique address, the interface host is responsible for running a "duplicate address detection" algorithm on unicast addresses. Lo scopo di questo algoritmo è provare a impedire indirizzi non univoci sulla rete.The purpose of this algorithm is to attempt to prevent non-unique addresses on the network. Questo processo è definito in IETF RFC 1971.This process is defined in IETF RFC 1971.

Questa enumerazione viene utilizzata dalle UnicastIPAddressInformation classi e. MulticastIPAddressInformationThis enumeration is used by the UnicastIPAddressInformation and MulticastIPAddressInformation classes. Le istanze di questa classe vengono restituite quando si recuperano le informazioni sull'indirizzo NetworkInterface unicast per un oggetto.Instances of this class are returned when you retrieve the unicast address information for a NetworkInterface object.

Si applica a