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3-stage switch; see need for k=2n-1 for it to be non-blocking. A. A. B. B. C. C. D. D. A sends to C; B sends to D; C sends to A; D sends toB See that there is no blocking even if k=2. 3-stage switch; see need for k=2n-1 for it to be non-blocking. A. A. B. B. C. C. D. D. E. E.
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3-stage switch; see need for k=2n-1 for it to be non-blocking A A B B C C D D A sends to C; B sends to D; C sends to A; D sends toB See that there is no blocking even if k=2 M. Veeraraghavan
3-stage switch; see need for k=2n-1 for it to be non-blocking A A B B C C D D E E F F A sends to C; B sends to F; E sends to A; Say F wants to send to E – it cannot use the first switch in the intermediate stage because of E to A connection, it cannot use the second switch because the B to F connection has used up the line to the third switch in the output stage. Hence we need the third intermediate switch M. Veeraraghavan