Series Foreword

This book literally gets to the heart of the operation of modern computer networks – on which much of society strongly depends for almost all aspects of life and work. It is concerned with so-called network mergers and migrations which – in the case of migrations more than mergers – are an increasingly frequent occurrence because networks are inevitably under constant change.

Although the imperatives for change come mainly from business requirements, the implications are of course translated to the technical level of the network system – to the routers and their operating environment – and it is solely at the technical level that this book considers the subject.

In particular, the book treats the subject from the viewpoint of Junos^® operating system, which is the network operating system developed by Juniper Networks Inc. The two authors are expert practitioners, with a wealth of experience in the field, and from them the reader will gain an in-depth understanding of the issues that face network operators and also network designers when faced with having to carry out changes. Both planning and implementation of solutions are covered in depth for the important network protocols, IGPs, BGP, and MPLS as the main focus.