Harold Ritter is a technical leader with the Cisco Advanced Services Central Engineering team. He is responsible for helping Cisco top-tier Service Provider customers to design, implement and troubleshoot routing protocols and multicast, for both IPv4 and IPv6, and MPLS solutions in their environment. He is a regular contributor to CiscoLive. He has been a network engineer for more than 14 years. Harold is a CCIE (#4168) for Routing & Switching and Service Provider.