S3 -> S4 
S4 -> S3 
S4 -> S5 
S5 -> S3 
S5 -> S6 
S5 -> S7 
S5 -> S8 
S5 -> S9 
S6 -> S3 
S6 -> S6 
S6 -> S7 
S6 -> S8 
S6 -> S9 
S7 -> S6 
S7 -> S8 
S7 -> S9

- PC3 : 
10.32.0.0/17 10.16.0.254

- PC4 : 
10.16.0.0/17 10.32.0.254
10.48.0.0/17 10.32.0.255

- PC5