Using Simple Network Management Protocol (SNMP) implementing data flow and run controls in the KLOE experiment

Event builder systems in high rate physics experiments are going to be configured as computer networks built around switches (FDDI, ATM, FCS, HIPPI). Data coming from different sectors of the apparatus go into the switch in such a way that all the data related to the same event are concentrated in the same processor. A central processor that is responsible of the data flow control manages the assignment between events and processors. The standard TCP/IP is frequently used to transfer data, while the standard SNMP is used to manage the network devices. The KLOE experiment intent to extend the use of the SNMP protocol in its DAQ system. Private extensions of the SNMP standard MIB are used to implement the network related and feed-back functionalities of the data flow protocol. Similar extensions are used to implement the command distribution of the Run Control system. (author)