Internet Routing Architectures (Design & Implementation)
This invaluable reference provides realistic, practical design  solutions from Cisco Systems-the Internetworking authority.  - Teaches  how to construct and support robust ISP connections to the  Internet- Illustrates Inter- and Intra-domain routing issues,  topologies, and scenarios for practical application- The only  Internetworking book emphasizing domain routing issues and protocols  endorsed by Cisco!