The particle identification system ASHIPH (Aerogel SHifter PHotomultiplier) has been working in the KEDR experiment at VEPP-4M collider since 2014. The system consists of 160 counters arranged in two layer and covers the 96% of the solid angle. Two layer system permits to use different approaches for pi/K-separation. Three such approaches are described. The status of the system is presented. Main system parameters such as BhaBha suppression factor, pi/K-separation power, relativistic particle detection efficiency were measured with help of cosmic particles and experimental data collected at the peak of J/psi-meson. Dependences of these parameters on time are evaluated. Monte-Carlo simulation procedures are described and its results are presented as well.