A Cisco veteran for 17 years, he has contributed significantly to the design, implementation and operations of IPv6 from the early days of ISATAP, 6Bone and 6in4 to the current day. Cisco has a 100% dual-stacked branch office network, remote access (Anyconnect), iPoP and DMZ as well as areas in the DC that are supporting www.cisco.com. Cisco has also enabled IPv6-only in a single DC pod as well as in a single campus building in San Jose with a view to establishing the gaps and challenges in moving to a single protocol and reducing the operational overhead.