Abstract
Abstract Large data centre provides the important facilities like storage, computation, communication, etc. Therefore, we must be very careful while designing the infrastructure and networking of the data centre as these factors decides the expenses on implementation and maintenance of the infrastructure. The data servers are connected with Top of Rack (ToR) switches, which are further connected to aggregated/core switches. This paper discusses the blocking performance of the switches used at various levels of optical data networks. However it must be noted that in data centres traffic is not blocked and but it is temporarily stored but if it can’t stored a negative acknowledgement is sent back and packet re-transmission is done. Blocking performance is done to judge the re-transmission of packets. Blocking performance is obtained using mathematical model as well as using Monte Carlo Simulations.
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