D Chapin (Brown University)
The DZERO Level 3 Trigger and Data Aquisition (L3DAQ) system has been running continuously since Spring 2002. DZERO is loacated at one of the two interaction points in the Fermilab Tevatron Collider. The L3DAQ moves front-end readout data from VME crates to a trigger processor farm. It is built upon a Cisco 6509 Ethernet switch, standard PCs, and commodity VME single board computers. We will report on operating experience, performance, and upgrades. In particular, issues related to hardware quality, networking and security, and an expansion of the trigger farm will be discussed.