Supersymmetry (SUSY) is a theoretically attractive scenario for
physics beyond the Standard Model
which provides a suitable Dark Matter candidate in case
R-parity is conserved. If SUSY is realized at the TeV scale, as
favored by several arguments, it will be accessible at the Large
Hadron Collider (LHC) at CERN within the first few years of data
taking. We present search strategies for generic SUSY models with
R-parity conservation with the ATLAS detector at the LHC. These
inclusive search strategies are based on signatures including
missing transverse momentum from undetected neutralinos, multiple
jets and leptons or b and tau jets. We show the corresponding
discovery reach for the first fb-1 of ATLAS data and discuss
possible measurements needed to extract the masses of SUSY
particles including the undetected neutralino.