Introduction 1
	• The HEP community is increasingly dependent on networking as internal cooperation grows (needs transfer huge amount of data between experimental sites as SLAC,CERN,etc. and home institutes spread over the world) • Our main task is to provide the physicists reliable access to the network (and the integral part of this activity is NETWORK MONITORING) • We have several monitoring system in operation (active: as ping or iperf, and passive: reading SNMP counts or using netflows data