Beau Williamson, CCIE No. 1346, is a consulting engineer in the Office of the CTO at Cisco Systems. His area of expertise is general IP networking, with a special focus on IP multicast. He is frequently called upon by Cisco customers and internal Cisco engineers around the world to consult on the design, implementation, and debugging of IP multicast networks. Beau is also the author and developer of Cisco's internal IP multicast training class, as well as a frequent presenter of IP-related topics at Cisco Networkers and CCIE conferences domestically and abroad.