  We present a calculation of the phase-shift for $\pi$-$\pi$ scattering in
isospin-1, spin-1 channel in the elastic region. The mass and width of the rho
resonance is extracted by fitting these phaseshifts. To vary the scattering
momentum we employ asymmetric boxes. We use $N_f = 2$ nHYP-smeared clover
fermions and generate two sets of ensembles with pion masses about 315MeV and
227MeV. To determine the phase shifts we compute the energy spectrum both for
states at rest and boosted. We employ a variational analysis with interpolating
fields including several $q$-$\bar{q}$ and $\pi$-$\pi$ interpolating fields
with different scattering momenta.
