Hi, 
  
Today I connected five 2032 Hikvision IP Cams to my network and I realized that they have the same MAC and Serial Number (I used the SADP tool). 
The big problem is that I can't watch them simultaneously in my NVR because they have the same MAC Address and the network can't identify them properly. 
I bought the cams from aliexpress 3 months ago. 
  
Thanks