This tutorial introduces service providers to some of the features available in BGP to aid multihoming to the Internet. After an explanation of multihoming and the principles being followed in this tutorial, several examples involving different scenarios will be given. This includes the options available when multihoming to the same ISP (including RFC2270) and to different upstreams. Configurations for modifying inbound and outbound traffic flows are covered. The tutorial concludes with a case study, and an examination of the use of BGP communities by several ISPs.

About the Presenter
Philip Smith has been with Cisco Systems for three years. He is part of the Internet Architectures Group, which is led by the CTO for Consulting Engineering. His role includes working with many ISPs in the Asia Pacific region, specifically in network design, configuration, and scaling, as well as providing training through an extensive ISP Workshop program.

Prior to joining Cisco, Philip spent five years in several key network engineering and operations roles at PIPEX (now part of UUNET's global ISP business), the UK's first commercial Internet Service Provider. He was one of the first engineers working in the commercial Internet in the UK, and played a key role in building the modern Internet in Europe.