Which network parameters are interesting Network monitoring Background measurements of the network performance Impact of the Grid applications to the network Support Grid user with providing long term and immediate reports of the network Which network parameters are interesting Round Trip Time / One Way Delay Packet loss Route changes Volume of the transfered data

Used measurement systems and utilities Ripe BOX PingER Traceroute others Plans to do add our PingER data to the « pre-testbed » network monitoring monitor the networks to the all French testbed0 sites use Network Weather System to forecast Grid resources