CNS is a leader in the transition to IPv6, as their [[w:Autonomous System|ASN]] consistently ranks in the top 5 in terms of percentage of IPv6 traffic, according to [http://www.worldipv6launch.org/measurements/ World IPv6 Launch Measurements]. A dual-stack topology exists for the entirety of campus, but not all systems connected to the network are IPv6-enabled. One system that notably lacks connectivity is the main vt.edu website, which is due to a lack of support from the load balancers currently in use. For legacy reasons, Virginia Tech continues to use its /48 sub-allocation from the [[w:University of Maryland|University of Maryland]]on many subnets, instead of its although newer equipment is being configured with the assigned IPv6 block (2607:b400::/32). It is unknown when the new address space will begin to be used.