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Welcome to the Cisco Networking  Professionals Ask the Expert conversation.  Service Provider and  Enterprise network engineers are facing one of the major challenges  since the inception  of the Internet; the transition to IPv6. Several  tools and techniques are available today to ease this major undertaking.  This ask the expert session with Harold Ritter focuses on some of the  tunneling  techniques such as static tunnels, 6to4, isatap, 6rd and some  of the translation mechanisms such as nat444, nat64, dual stack lite  that will help network engineers reach their objective  of making IPv6  ubiquitous.  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.

Remember to use the rating system to let Harold know if you have received an adequate response.

Harold  might not be able to answer each question due to the volume expected  during this event. Our moderators will post many of the unanswered   questions in other discussion forums shortly after the event. This event  lasts through November 5, 2010. Visit this forum often to view  responses  to your questions and the questions of other community  members.