  A proposal to study the effect of interaction in an agegraphic dark energy
model in DGP brane-world cosmology is presented in this manuscript. After
explaining the details, we proceed to apply the dynamical system approach to
the model to analyze its stability. We first, constrain model parameters with a
variety of independent observational data such as cosmic microwave background
anisotropies, baryon acoustic oscillation peaks and observational Hubble data.
Then, we obtain the critical points related to different cosmological epochs.
In particular, we conclude that in the presence of interaction, dark energy
dominated era could be a stable point if model parameters $n$ and $\beta$, obey
a given constraint. Also, big rip singularity is avoidable in this model.
