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- n-1-3-020.33
- Europe - HEPnet
-
- by Brian Carpenter <brian@dxcern.cern.ch> and Francois Fluckiger
- <fluckiger@vxcern.cern.ch>
-
- HEPnet is the collection of lines, equipment and services partially or
- totally funded and operated by the European High Energy Physics (HEP)
- community for its 5000 physicists and their support staff. It provides a
- range of services supported in collaboration by operational staff from
- major HEP institutes. HEPnet in Europe may be compared to the US
- Department of Energy's ESnet, although limited to particle physics.
-
- HEPnet was set up in response to very specific requirements of the
- community, such as the need for direct lines of fixed and guaranteed high
- bandwidth between major laboratories and data processing centres, or very
- short network latencies to support advanced distributed processing
- applications. It is thus complementary to HEP use of general-purpose
- research network infrastructure.
-
- The basic infrastructure relies on a set of point to point international
- leased lines between HEP institutes. In several cases, these leased lines
- result from sharing with other European initiatives, such as EASInet, the
- networking component of the IBM European Academic Supercomputing
- Initiative, EARN, EUnet or NORDUnet. HEPnet is fully connected via high
- speed lines to EBONE, the European IP backbone.
-
- The international topology is mainly a star around CERN, the European
- Particle Physics Laboratory located on the French-Swiss border near
- Geneva. With lines ranging from 9.6Kbps to 2Mbps it directly
- connects France, Hungary, Germany, Greece (on order), India, Israel,
- Italy, Netherlands, Poland, Russia, Spain (planned),
- Switzerland, the UK, and the USA. The aggregate bandwidth exceeds 12
- Mbps, including shared lines. Nordic countries are also indirectly
- connected via NORDUnet. National traffic distribution occurs either
- through the national general purpose networks, or through a dedicated HEP
- network (such as in France and Italy).
-
- The leased lines either run native IP, or are multiplexed. TCP/IP,
- DECnet, RSCS and SNA (plus a residual X.25 service) are provided as
- "bearer" services, supporting application services such as distributed
- file and tape management and the World Wide Web (WWW) information access
- system. Monthly HEP traffic is estimated to be 150 Gbytes.
-
- The network is technically managed by the HEPnet Technical Committee (HTC)
- comprising the national HEPnet managers, complemented by a user driven
- group, the HEPnet Requirements Committee (HRC).
-
- Hopes for future evolution include a move to speeds in the range of 34
- Mbps to meet the requirements of new European particle accelerators such
- as the planned Large Hadron Collider (LHC), or the introduction of
- multi-media applications for remote collaborative work. In addition, the
- community has launched a project for shipping physics files at 8Mbps over
- the Olympus satellite of the European Space Agency.
-