- QFQ queuing discipline
In Red Hat Enterprise Linux 6.3, the tc utility has been updated to work with the Quick Fair Scheduler (QFQ) kernel features. Users can now take advantage of the new QFQ traffic queuing discipline from userspace. This feature is considered a Technology Preview.
- vios-proxy, BZ#721119
vios-proxy is a stream-socket proxy for providing connectivity between a client on a virtual guest and a server on a Hypervisor host. Communication occurs over virtio-serial links.
- IPv6 support in IPVS
The IPv6 support in IPVS (IP Virtual Server) is considered a Technology Preview.