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Network providers with a growing customer base are forced to use the Internet Protocol Version 6 (IPv6) to get new customers connected. Connecting ever more networked machines to the Internet ("Internet of things") requires a huge number of additional IP addresses. Leading content providers in the Internet world such as Facebook and Google are already running on the new version of IPv6. Some governments have already followed their success story, too. Not supporting IPv6 can cause connection problems and information lack on a web site to visitors connecting from an IPv6-enabled network. If public and private sector will introduce IPv6 in their policies, nobody will be excluded in future from the benefits of the information society. When implementing IPv6, one has to remember to "think globally and act locally". No citizen must be withdrawn from the convenience of an ever improving information society.

Addresses are one of the most useful inventions of the past. They are used to locate somebody or something spatially or geographically, to identify a fixed or mobile device or to send messages to electronic mailboxes. Most of these addresses have a textual representation being easy to remember or they may consist of numbers easy to forget -therefore the phonebook was invented. In case of electronic communication, no user needs to care much about the decimal or hexadecimal representation of addresses being used by technical systems to connect to each other or to send messages around. We are used to writing names such as www.ec.europa.eu to address a server instead. Yet, basically all communication between all stakeholders takes place based on IP addresses. This booklet will give a short introduction to IP addressing and the structure of IPv6 addresses, on how you can get IPv6 address space and the options you have to structure and tailor the address space to your needs. The German address plan will be used as an example.

Governments (and also some private companies) partly use virtual private networks (VPNs) to establish secure communication paths to other governments. Sometimes, special networks are implemented to integrate several governmental organizations into one logical network. On the European level one such network is called sTESTA. Most European member states have similar networks on the national and/or regional level. Different governmental organizations have their individual ICT strategy. Within the IP addressing in the local networks is not synchronized. Especially in states with a federal constitution the ICT is typically highly independent among the single government institutions. Their connections between networks today are established via highly restricted gateways. Complex transition mechanisms must be configured per each communication path. This causes delays in implementing new services and complexity in operation and troubleshooting. In consequence network complexity itself is often one possible reason to decline new ideas for governmental cooperation.

IT-Konsolidierung ist eine der größten und komplexesten Herausforderungen der Öffentlichen Verwaltung. Das Fraunhofer-Institut für Offene Kommunikationssysteme (FOKUS) hat daher eine Einführung in das Thema herausgegeben. Sie bietet einen Leitfaden für die erfolgreiche Umsetzung von IT-Konsolidierungen. Komplex ist das Thema vor allem deshalb, weil Infrastrukturen und Technologien ebenso betroffen sind wie IT-Prozesse und Governance - auf allen Ebenen und über Ressort- und Gebietskörperschaftsgrenzen hinweg. Zudem sind die Optimierungsaufgaben mehrdimensional, da sie gleichzeitig technologische, betriebswirtschaftliche und politische Aspekte berühren. Um Verantwortungsträger des öffentlichen Sektors bei der Bewältigung dieser schwierigen Herausforderungen zu unterstützen, liefert der Leitfaden eine einfache und anschauliche Einführung in das Thema der IT-Konsolidierung. Theoretische Grundlagen werden kompakt erklärt, typische Vorgehensweisen sowie mögliche Erfolgs- und Misserfolgsfaktoren angeführt. Praxisbeispiele, die vom langjährigen FOKUS-Kooperationspartner Dataport bereitgestellt wurden, ergänzen den theoretischen Unterbau des Themen-Leitfadens. Die Publikation richtet sich vor allem an Entscheider in Politik und Verwaltung und soll Ländern, Kommunen und involvierten Unternehmen als Orientierungshilfe beim Prozess der IT-Konsolidierung dienen.