01893nas a2200169   4500008004100000245004400041210004400085300001500129490000700144520137100151100002101522700002201543700001901565700001601584700001701600856010601617       2009                        eng d00aQoS experiences in native IPv6 networks0 aQoS experiences in native IPv6 networks  a 119 - 1370 v193 a<p>Deployment of IPv6 technology in research and commercial networks has been accelerated in the last few years. Inevitably, as more advanced services take advantage of the new technology, IPv6 traffic gradually increases. Today, there is limited experience in the deployment of Quality of Service (QoS) for IPv6 traffic in backbone networks that support the Differentiated Services framework. As available software and hardware is designed to handle IPv4 packets, there is a need to accurately measure and validate performance of QoS mechanisms in an IPv6 environment. This paper discusses tests and technical challenges in the deployment of IPv6 QoS in core networks, namely the production dual stack gigabit-speed Greek Research &amp; Education Network - GRNET and the IPv6-only 6NET European test network, using both hardware and software platforms. In either case, we succeeded in delivering advanced transport services to IPv6 traffic and provided different performance guarantees to portions of traffic. The deployed QoS schema was common for IPv6 and IPv4; in most cases both v4 and v6 traffic exhibited comparable performance per class while imposing no significantly different overhead on network elements. A major conclusion of our tests is that the IPv6 QoS mechanisms are efficiently supported with state-of-the-art router cards at gigabit speeds.</p>
1 aBouras, Christos1 aPrimpas, Dimitris1 aLiakopoulos, A1 aMaglaris, B1 aKalogeras, D  uhttp://telematics.upatras.gr/telematics/publications/qos-experiences-native-ipv6-networks?language=en01638nas a2200169   4500008004100000245005900041210005900100260002100159300001500180520105700195100002101252700002201273700001901295700001601314700001701330856012101347       2005                        eng d00aQoS experiences in native IPv6 GRNET and 6NET networks0 aQoS experiences in native IPv6 GRNET and 6NET networks  c17 - 20 November  a 284 - 2923 aAdoption of IPv6 technology has been accelerated in the last few years but there is limited experience in the deployment of Quality of Service (QoS) for IPv6 traffic in backbone networks. As available software and hardware is designed to handle IPv4 packets, there is a need to accurately measure the performance of QoS mechanisms in an IPv6 environment. This paper discusses tests in the deployment of IPv6 QoS in core networks, namely the production dual stack GRNET and the IPv6-only 6NET networks, using both hardware and software platforms. In either case, we succeeded in delivering advanced transport services to IPv6 traffic and provided different performance guarantees to portions of traffic. The deployed QoS schema was common for IPv6 and IPv4; in most cases both v4 and v6 traffic exhibited comparable performance per class while imposing no significantly different overhead on network elements. A major conclusion of our tests is that the IPv6 QoS mechanisms are efficiently supported with state-of-the-art router cards at gigabit speeds.1 aBouras, Christos1 aPrimpas, Dimitris1 aLiakopoulos, A1 aMaglaris, B1 aKalogeras, D  uhttp://telematics.upatras.gr/telematics/publications/qos-experiences-native-ipv6-grnet-and-6net-networks?language=en01889nas a2200145   4500008004100000245010300041210006900144300001500213520128100228100002101509700002201530700001901552700001601571856015601587       2004                        eng d00aProviding and verifying advanced IP services in hierarchical DiffServ networks - the case of GEANT0 aProviding and verifying advanced IP services in hierarchical Dif  a 321 - 3363 aThe differentiated services (DiffServ) framework is widely proposed as an efficient method for providing
advanced IP services to large-scale networks, with QoS requirements. However, the provisioning of such
services in production networks has proved to be more difficult than initially expected, in defining, setting
and verifying appropriate Service Level Agreements (SLAs). GEANT, the Gigabit core pan-European
research network, on a pilot basis introduced ‘Premium IP’ service, offering bounded delay and negligible
packet loss to the European National Research & Education Networks (NRENs) that it interconnects.
However, large scale provisioning of this new service requires the definition of efficient interaction
procedures between administrative domains involved and methods for SLA monitoring. This paper focuses
on these issues and presents the experience acquired from the early experiments in GEANT, as an example
of hierarchical Gigabit multi-domain environment, enabled with QoS provisioning to its constituent
NRENs. This model scales more efficiently than the common peering Internet Service provider (ISP)
commercial paradigm. Finally, we outline other options that promise QoS, such as Layer 2 VPNs in MPLS
backbones, with non-standard (yet) mechanisms.1 aBouras, Christos1 aSevasti, Afroditi1 aLiakopoulos, A1 aMaglaris, B  uhttp://telematics.upatras.gr/telematics/publications/providing-and-verifying-advanced-ip-services-hierarchical-diffserv-networks-case-geant?language=en