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The normal branch of Dvali-Gabadadze-Porrati braneworld gravity with branetension is confronted by the currently available cosmic observations from thegeometrical and dynamical perspectives. On the geometrical side, the type Iasupernova as standard candle, the baryon acoustic oscillation as standard rulerand the cosmic microwave background measurement from the first released 15.5months data were used to fix the background evolutions. On the dynamical side,the redshift space distortion data will be used to determine the evolution ofthe matter perturbation. Through a Markov chain Monte Carlo analysis, we foundthe dimensionless crossover scale$\Omega_{r_c}=1/(4H^2_0r^2_{c})=0.00183_{-0.00183}^{+0.000338}$ in a spatiallyflat normal branch of Dvali-Gabadadze-Porrati braneworld. This result suggeststhat the crossover scale $r_c$ should be around $12H^{-1}_0$ which isconsistent with the previous result $r_c>3H^{-1}_0$ and greater. It alsoimplies that the five-dimensional gravity effect is weak to be observed in$H^{-1}_0$ scale.

Confronting DGP Braneworld Gravity with Cosmic Observations after Planck Data