[LAC-TF] FLIP6 - 2016 Report
Azael Fernandez Alcantara
afaza at unam.mx
Fri May 13 17:08:25 BRT 2016
During the 2016 edition of the Latin American IPv6 Forum, excelled the
topics of DHCPv6, 5G, SDN/NFV, OpenWrt, Scalable routing, Network
Reconnaissance and study cases of university and community networks.
The presentations included:
Two talks of special guests:
- IPv6-Based 5G Networking Enabled by SDN-NFV, Cloud Computing and IoT. By
Latif Ladid, president of the IPv6 Forum.
Emphasis was made during the presentation on the evolution that the
protocols have had and will have on the Internet, which in many cases has
become "InterNAT". The new Internet is already contemplating technologies
as SDN and NFV with Openstack v6, as well as the necessary use of IPv6 in
the 5G networks. Regarding IoT and data generation, the third version is
the one that uses IPv6 with 6LowPAN and ROLL. IPv6 makes possible the
two-ways Internet E2E (End-to-end), and the tendency will be IPv6 over 5G
and WDM. Later, numbers were given about the deployment of IPv6 in the
world, excelling Brazil, Ecuador and Peru in Latin America.
- DHCPv6 Operational Challenges by Tom Coffeen, evangelist of IPv6 in
IPv6 statistics in the world were mentioned, mainly in the USA; the
estimate, according to Google, the % of users of IPv6 will be 50% for
2018. Were given the differences between DHCP for IPv4 and IPv6, outlined
the advantages of the latter, as well as variations and types such as
Stateful and Stateless DHCPv6 based on the management of two flags "M" and
"O", and the behaviors depending on the operating system of the user.
Different solutions were presented to the possible fail overs of DHCPv6 in
its deployment. Some techniques were also named to have a more secure and
controlled implementation of DHCPv6; recommendations on addressing schemes
and the lack of DHCPv6 support in Android devices.
And 7 presentations were selected by the Evaluation Committee of the
FLIP6, composed of 9 people, that were:
- Deploying SDN Technologies in Hand with IPv6
It started with UDG data and statistics on the use of IPv6, where the
number of students is 3 times higher than that of available IPv4
addresses. The benefits of combining the use of SDN together with IPv6 to
offer for example, by means of dynamic circuits, payroll services. The use
of OESS for the unfolding of OpenFlow with IPv6 support was mentioned. As
well as the development of SDN applications for traffic optimization; and
a VoIPv6 study case.
- Analysis of IPv6 Implementation in OpenWrt According to RFC7084
As part of the IPv6.br project, where it was determined the lack of IPv6
in edge and last mile devices, motivated this analysis of IPv6 using
OpenWrt, taking as reference the RFC 7084 and conducting a series of
experiments to find out the degree of support for IPv6 in 3 different
topologies. Becoming obvious the lack of full support of all
functionalities like DAD, and the state of requirements in the categories:
general, on the WAN side, "Link-Layer, assignment of addresses, delegation
of prefixes, ULA, on the LAN side, 6RD and DS-Lite. It was concluded that
OpenWrt works with IPv6 but presents some errors for proper operation.
- Strategy of Scalable Routing in the Transition and Adoption of IPv6.
Starting with an analysis of the growth of BGP entries in routing tables
at global level and the estimate for 2020, the mention of the advantages
and disadvantages in the use of the type of memory known as TCAM, where by
default is assigned little space for the number of IPv6 routes. The use of
multihoming and the different protocols alternatives to obtain a more
scalable routing like: SCTP, shim6, HIP and LISP, where the latter is more
appropriate and has the highest degree of development. The different
implementations of LISP, their advantages and use cases were also
- Comparison between mechanisms of IPv6 transition
After mentioning a review of the different existing mechanisms of
transition/coexistence with IPv6, the different options were named for
deployments with IPv6-only, such as: DS-LITE, Lightweight 4over6,
464XLAT, MAP-E and MAP-T, with their advantages and disadvantages. At the
end a comparative table was presented with the methods of transition and
the indication of the different features in each one, as well as an study
case in a multi-service network.
- Ask Dr. IPv6 and statistics of IPv6
A program called "Dr. IPv6" was presented, which consists of a mail
account that will receive questions from the community of Latin America
and the Caribbean, and will be answered, without warranty, with audio by
an expert, the most suitable according to the question's topic. The
recording will be available as Podcast, in MP3, and the answer will be
announced in the list of lactf.
In the presentation of statistics, data analysis gathered by LACNIC
(Oct.2015-April 2016) were shown and these are openly available including:
the # of Web sites with content and AAAA records, the % of domains AAAA
pointing to addresses in the region of LACNIC, the size of the
announcements of prefixes (BGP Table), BGP with RPKI, and consultations
with DNSSec. Finally, the formats available of these data.
- Advanced IPv6 Network Reconnaissance
Taking as a basis the RFC7707, it was noted that since many IPv6
allocations are performed under certain well-known patterns then, IPv6
networks are scannable. A myth that exist.
As a result of an experiment carried out in allocation patterns for
servers: Web, mail and DNS, and networks with customer segments; through
the use of developed tools to perform scans. References were also made in
the use of extension headers and the consequences on their use by the
filtering and discarding that is performed. Finally was introduced the
topic of the scanning of TCP/UDP ports.
- Experience implementing IPv6 in the "Universidad Distrital Francisco
An explanation was given about the infrastructure of the network of the
university belonging to RITA ( Research Network of Advance Technology),
including the phases of the IPv6 implementation, IPv6 enabled services and
research applications on IPv6, by promoting their use and adoption,
testing for IPv6 deployment, and the connections to academic networks.
In Lightning Talks of IPv6, a single presentation was presented:
Mesh Broker Tunnel for Communitarian networks. By Nicholas Echaniz of
Alter Mundi, Argentina.
An implementation of libremesh, due to the high latency values of
available commercial "tunnel broker" services, and the need to connect
different networks of AlterMundi, with the minimum possible latency. When
combining tinc-vpn (a VPN software mesh) with a protocol of dynamic
routing (babeld or bmx6). Finally was mentioned the future deployment of a
communitarian network using a scheme similar to the one of 6RD.
To conclude the FLIP6-2016, were announced the winners of "Angel" play,
which was available at the entrance to the main auditorium, and two
attendants to the 3rd part or second day of the FLIP6, who answered
correctly 2 questions formulated.
Azael Fernandez Alcantara
More information about the LACTF