Example. Connect N=128 nodes, with Pe=Pc=36 ports and a blocking factor Bl=1. Calculate
E and C, the number of edge and core switches, respectively.
As Bl=1, Eptn=Eptc=Pe/2=18.
Then, E=Ceil (N/Eptn)=Ceil (7,1)=8.
B=Pc div E=36 div 8=4.
C=Ceil (Eptc/B)=Ceil (18/4)=Ceil (4,5)=5.
The answer is: E=8, C=5.
As Bl=1, Eptn=Eptc=Pe/2=18.
Then, E=Ceil (N/Eptn)=Ceil (7,1)=8.
B=Pc div E=36 div 8=4.
C=Ceil (Eptc/B)=Ceil (18/4)=Ceil (4,5)=5.
The answer is: E=8, C=5.