Subject: N-1-4-012.55 ELTENET: The WAN of Eotvos Lorand University in Hungary Csaba Laszlo Laszlo Daruhazi, Ferenc Telbisz Information Technology Center, Eotvos Lorand University of Sciences As a part of HUNGARNET, the universities of Budapest play a significant role in networking in Hungary. There is an FDDI ring being set up in Budapest connecting the three biggest networks: Eotvos Lorand University of Sciences WAN, the University of Economic Sciences, and the Technical University. There are also significant efforts in networking in Debrecen where a MAN FDDI is to be set up and Szeged where a university MAN is operational. These networks are based on fiber optic technology. ELTENET is currently the biggest network. ELTE has more than 10 main campuses with more than 60 buildings throughout Budapest, of which 20 buildings at 7 campuses are currently connected to the network. The idea of setting up ELTENET came in the summer of 1990 at the Faculty of Sciences. The Ministry of Education financed part of the project with additional support from the Mellon Foundation in the USA. Plans started to be worked out in the fall of 1990, with a final proposal accepted in the spring of 1991. The 12 km fiber backbone became operational in the spring of 1992. The total length of the coax cabling is about 12 km with more than 160 segments. There are more than 30 fiber- and coax-based repeaters in the network. There are currently 2 AGS+ routers at the Network Services Center and three more at other campuses connected via 64 kbps leased lines and, in the future, with 64 kbps X.25 backup. The routing protocol is BGP to the autonomous system of the University of Vienna that is the Internet gateway and IGRP within the network. The network is in connected state to NSFNET, EASINET and RIPE. There are one Class B and two Class C addresses used on the network currently. The official protocol is the standard TCP/IP. Most PC installations use the public domain NCSA Telnet program but FTP Corporation's PC/TCP is also used. On the VAXes the Carnegie Mellon Univ. TCP/IP and DEC's UCX are used. As there are many Vaxes on the network DECNET is also used. The total number of hosts on the network is currently about 800. The vast majority of these are PCs. There are about 30 DEC machines among which the biggest one is the University's central VAX 6000-510 with 128 MB main memory and 6 GB disk capacity. The other large mainframe is an IBM 3090 with 128 MB memory and 35 GB disk space. There are a smaller number of IBM and DEC RISC- based workstation and some Sun Microsystem Sparcstations.