First German Gigabit Network Testbed
by Peter Wunderling
The first Gigabit Network Testbed
in Germany started on 1 August 1997. The project is sponsored by 'Verein
zur Förderung eines Deutschen Forschungsnetzes, e.V', the German Research
Network Association, and the Federal Minister for Education, Science, Research
and Technology of Germany with additional funding of the participants GMD
German National Research Centre for Information Technology and the
Research Centre Jülich (Forschungs-zentrum Jülich - FZJ).
The main areas of investigation of the Gigabit Testbeds are WAN/LAN
interworking, HIPPI/ATM networking, connecting high performance computing
(HPC) systems, heterogeneous meta-computing, and remote visualization.
Several institutes of both research centres are involved in these investigations.
Only the networking aspects are discussed in this article.
The prerequisite for this project was the availability of a fibre optic
link between both research centres (about 100 km). The link including the
SDH equipment is provided by o.tel.o Service GmbH, a subsidiary company
of a German energy supplier. SDH (synchronous digital hierarchy) is the
base for high speed ATM links. At the beginning of the project the SDH
connection is configured for a maximum transmission speed of 622 Mbps (Megabits
per second).
Architecture of the German Gigabit Network Testbed.
Via this link the ATM networks of GMD and FZJ are connected by using
ATM switches (ASX-1000) of 'FORE Systems' with STM4 ports (synchronous
transfer mode, 622 Mbps). Both ATM networks are already running 622 Mbps
on the backbone; therefore the total bandwidth will be offered to the applications.
The two HPC-systems CRAY T3E and IBM SP2 will be connected via a HIPPI/ATM
gateway (HIPPI High Performance Parallel Interface, which operates
at 800 Mbps) to the ATM networks because, up to now, there are no 622 Mbps
ports available.
It is planned to increase the speed to 2.4 Gbps between both research
centres as soon as STM16 ports are available for the ATM switches (I/98).
Furthermore, it is planned to expand the Gigabit Network Testbed in the
direction of Cologne. Other research centres, the University of Cologne
and, in particular, some television companies are interested in participating
in this project, eg to use and test this high speed network for applications
like the 'virtual studio' or 'Cyberstage' of GMD.
Please contact:
Peter Wunderling - GMD
Tel: +49 2241 14 2930
E-mail: peter.wunderling@gmd.de
