Hello everyone

Two days ago i updated our CCTV Dahua firmware to the latest but unfortunately the entreprise network goes crazy, Vlans missed up also the network got flooded with ARP requests the network has been very slow, after using ip scanner I've seen all ip adresses was taking by dahua with this mac adress a0-bd-1d-b4-ab-c2 . I had to return to previous firmware but the issue Continuous, any one had this problem beside me ?