F5CAB3: BIG-IP Administration Data Plane Configuration

How does the BIG-IP system distribute traffic according to the configuration below?

pool my_pool \{  
  
Ib_mode fastest -  
min active members 2  
member 10.12.10.7:80 priority 3  
member 10.12.10.8:80 priority 3  
member 10.12.10.9:80 priority 3  
member 10.12.10.4:80 priority 2  
member 10.12.10.5:80 priority 2  
member 10.12.10.6:80 priority 2  
member 10.12.10.1:80 priority 1  
member 10.12.10.2:80 priority 1  
member 10.12.10.3:80 priority 1  
\}