LKBDE11223: Windows Client erhält automatisch eine unerwünschte IP Addresse


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LKB | Created: 02-04-2020 | Version: 0 | Language: DE | Rating: 0 | Outdated: False | Marked for deletion: False

Author: Wim Peeters - Keskon GmbH & Co. KG


Symptom

Findet ein Windows Client keinen DHCP Server, so bekommte er eine Zufalls IP-Addresse (genannt "APIPA").

Cause

Normales Systemverhalten, das über die Registry abschaltbar ist.

Solution

"APIPA" ist die Abkürzung für "Automatic Private IP Addressing" und nutzt den IP Adressbereich 169.254.0.0/16.

APIPA kann über den folgenden Registry Schlüssel deaktiviert werden:

[HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpipParametersInterfaces{InterfaceGUID}]
"IPAutoConfigurationEnabled"=dword:00000000

Nach Setzen dieses Schlüssels behält der Client seine letzte IP Adresse, anstatt eine zufällige Adresse zu generieren.

About the Author

Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.

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