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In order to avoid collision during data transmission in
Clos network, an orthogonal link selection is adopted. To
prevent data collision during transmission, IMs cannot send data through the same CM to the same OM at the same time. So we fixed the paths from IM to CM and from CM to OM. The port of each IM is sent to its destination OM via a different CM; CM would send data received from IM to the corresponding OM, so we just need to make sure that different IMs send data to different OM through the same CM at the same time. |