An experiment in videoconferencing
over IPv6 using Isabel
Michael Stanton [email protected]
Director of Innovation, RNP, Brazil
FLIP-6, Montevideo, March 2004
(Thanks to Graciela M.L. Martins and Marcelo R. Faria for use of their slides)
RNP/PAL/xxxx
© 2004 – RNP
Agenda
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RNP IPv6 Backbone and Peerings
•
What was the event?
•
What was this videoconference experiment?
•
What is the Isabel application?
•
Conclusion
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Rede Nacional de Ensino e Pesquisa - RNP
• RNP is a “quasi non-governmental organisation” (quango),
formally a non-profit company, maintained by the federal
government through a mangaement contract
• Offers production IP service to research and education
community in Brazil, through a national backbone (one PoP in
each state)
– Around 240 client institutions, normally connected to state networks (in the
more populous states), or directly to the local PoP
• Good national and international connections to R&E and
commodity networks
• Responsible also for exploring new networking technologies and
developing new networking techniques
– IP/WDM, multicast, QoS, IPv6
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RNP IPv6 Backbone
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RNP IPv6 Backbone
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Routers with dual-stack: same equipment used in the
IPv4 production service
•
Native IPv6 links (ATM) and tunnels (IPv6/IPv4)
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RIPng is the internal routing protocol
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BGP4+ for external routing
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Cisco 750x with IOS images 12.2(14)S
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Peerings
•
Currently RNP has IPv6 peering with seven other networks:
•
Abilene / Internet 2 - USA (native)
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AMPath – USA (native)
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Renater – FR (tunnel)
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RCCN – PT (tunnel)
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ESNET – USA (tunnel)
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NTTcom / Verio – USA (tunnel)
•
Telefônica Empresas Brasil – BR (native)
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Also, the future CLARA network (June 2004)
will also support native IPv6
• Built and operated (2 years)
throughh the ALICE project
– Jointly financed by EU (80%)
and LA NRENs (20%)
• Bandwidth:
– Main ring: 155 Mbps
– Link to GÉANT: 622 Mbps
– Spur links: 10 to 45 Mbps
(except Cuba – by satellite)
– Access: up to 155 Mbps
• Peering, etc:
– GÉANT
– Future: ABILENE, APAN nets
– Transit to LA NRENs
• IPv6 connectivity:
– Native from day one
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Event: Global IPv6 Service Launch Event
– Brussels, January 2004
• The experiment was organised by the Euro6ix project of the IST
programme (EU), coordinated by Telefónica Investigación y
Desarrollo (Telefónica I+D) from Spain
– Coordinator: Carlos Ralli Ucendo
• Participation by Telefônica Pesquisa e Desenvolvimento (TPD),
part of Telefônica Empresas Brasil (TEB), and the Brazilian R&D
community, coordinated by RNP
• Objective: to demonstrate the use of IPv6 applications
– Magalia (network management)
– Isabel (remote collaboration)
• The Brazilian R&D community participated in demonstrating the
Isabel application
– Support from the Isabel team at Universidad Politécnica de Madrid (UPM),
coordinated by Maria José Perea
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Event – Network Topology
AMSIX-IPv6
AS1200
2001:7f8:4::1553:1
6NET/GEANT
UK6X
AS1752
2001:618:a::/48
LINX-IPv6
AS5459
Global Event
AS6680
2001:7f8:1::a500:1200:1
2001:800:40:2E02::2
Londres
Amsterdam
MAD6IX
2001:800:40:2E02::1
2001:800:40:2F01::1
Telefónica
DATA
2001:1498:1:E004:C:3352:100:0/126
.1
.2
TIWS
AS12956
2001:1498::/32
Madrid
2001:1820::/32
.5
.6
2001:1498:1:E004:C:3352:100:4/126
.1
2001:800:40:2F1A::1
Sao Paulo
2001:1498:1:A101:C1:0429:100:0/126
STM-4
2001:800:40:2F1A::2
STM-4
STM-4
STM-4
RNP
2001:12F0::/32
STM-1
Telefónica
Empresas
Brasil
AS10429
Windows XP
IPv6 Clients
STM-1
GbEth
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AS1916
2001:800:40:2F01::2
PC-Brasil ISABEL
MAGALIA
IPv6 Clients
mortadelo.tid.euro6ix.com
MAGALIA
2001:800:40:2301::101
www.tid.euro6ix.org
2001:800:40:2601::4
Telefónica I+D
AS3352
Event – Network Topology
EUROPE
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Event – Participants (RNP side)
•
Three RNP Offices: Campinas, Brasília and Rio de Janeiro
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Three Brazilian Universities:
•Federal
University of Santa Catarina (UFSC)
•Federal
University of Rio de Janeiro (UFRJ)
•University
•
of São Paulo (USP)
One regional networks: Rede-Rio (Rio de Janeiro)
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What is the Isabel application?
Isabel is a real time service creation environment launched in
1993 by UPM. Today, it is commercialised by Agora Systems S.A.
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A free version is available, with limited functionality. The
commercial version includes more features and supports
collaboration services such as tele-teaching and teleconferencing.
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The aim is the interconnection of a large number of users in
multipoint conferences.
•
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What is the Isabel application?
Isabel adapts collaboration sessions to users’ needs, by including
predefined scenarios:
Tele-meeting: links meeting rooms and allows a free mode of
interacting, allowing each participant to react at any moment.
•
Tele-training: links classrooms and allows a strict floor control by
the instructor of the interactions taking place. In this case, the
instructir can bring any site into scene at any moment and
students must request intervention.
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Tele-conference: this is a distributed conferencing service and is
based on centralised control which guarantees timely delivery of
content.
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Other new services can be configured by modifications to existing
services.
•
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What is the Isabel application?
Source: http://isabel.dit.upm.es/intro.html
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What is the Isabel application?
System requirements:
Based on SuSE Linux 8.1 operating system. Both the operating
system and the application can be installed and configured using an
instalation CD.
•
•
Requires at least a Pentium IV with 256 MB RAM.
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Impressions about the use of Isabel
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Different versions of Isabel cannot interoperate with each other
The hardware requirements are very important to assure good
quality during the conferences.
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The use of an operating system different from SuSE can make it
difficult to configure Isabel.
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The use of a chat software (IRC) was very important to prepare
the endpoints and resolve the problems with audio and video.
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Isabel doesn’t support the same quality that a endpoint specific
equipment, such as a Polycom ViewStation or Tandberg Station, but
represents a very good solution for distance education or
collaboration when there is a need for a large number of endpoints.
•
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Performance problems during the experiment
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The quality of the link used is very important.
A big problem found during the experiments was the
packet loss at the connection between the RNP and
Telefônica networks in São Paulo
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probably due to inadequate RNP router capacity at the
peering point – will be fixed for “next time”
•
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Conclusion
• This was the first demonstration in Brazil of a non-trivial
application over IPv6
• Except for the performance problems, which are
unrelated to the technology used, the experiment was
considered to have been a success
– Participants were very enthusiastic and contributed a lot of time
and energy to the project
• Most important lesson:
IPv6 will only really prosper when the users can see
advantages in its use – this requires the availability of
significant applications.
• Many thanks to all partners and participants!
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References
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IPv6 at RNP
www.rnp.br/en/ipv6/
LACNIC
www.lacnic.net
Euro6ix
www.euro6ix.org
•
•
Global IPv6 Service launch event, Brussels, January 2004
www.global-ipv6.net
Isabel group at UPM
isabel.dit.upm.es
•Isabel
distribution of the Madrid Global IPv6 Summit 2002 over an
IPv6 transition network
isabel.dit.upm.es/papers/isabelipv6/Isabelv6SAINT2002v3.pdf
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