Good Practices in Resilient Internet Interconnection

About ENISA The European Network and Information Security Agency (ENISA) is a centre of network and information security expertise for the EU, its member states, the private sector and Europe's citizens. ENISA works with these groups to develop advice and recommendations on good practice in information security. It assists EU member states in implementing relevant EU legislation and works to improve the resilience of Europe's critical information infrastructure and networks. ENISA seeks to enhance existing expertise in EU member states by supporting the development of cross-border communities committed to improving network and information security throughout the EU. More information about ENISA and its work can be found at Acknowledgements Over the course of this study, we have talked extensively with technical and managerial staff at Internet service providers, network operators, Internet exchange points and research labs. Some of our sources requested that we do not explicitly list their contributions. We therefore collectively thank all our contributors, workshop participants, and participating experts for their valuable input. Notice must be taken that this publication represents the views and interpretations of the authors and editors, unless stated otherwise. This publication should not be construed to be a legal action of ENISA or the ENISA bodies unless adopted pursuant to the ENISA Regulation (EC) No 460/2004 as lastly amended by Regulation (EU) No 580/2011. This publication does not necessarily represent state-of the-art and ENISA may update it from time to time. Third-party sources are quoted as appropriate. ENISA is not responsible for the content of the external sources including external websites referenced in this publication. This publication is intended for information purposes only. It must be accessible free of charge. Neither ENISA nor any person acting on its behalf is responsible for the use that might be made of the information contained in this publication. Reproduction is authorised provided the source is acknowledged. Executive Summary The interconnection system is the most fundamental building block of the Internet, as it enables independent operators to link up and extend their networks, reaching universal global coverage. Important enough to actually coin the term " Internet " , it is the prerequisite for the availability of the global Internet, as well as other services such as utilities, transport systems, or financial services that now depend on it. The 'Internet interconnection ecosystem' holds together all the Autonomous Systems that make up the Internet. The ecosystem is complex and has …