Cisco Nexus 7K

Some very important things that I learnt today about the Nexus platform

1) When we say 80Gbps full duplex, it actually means 80In+80Out = 160Gbps of effective bandwidth

2) When we talk about bandwidth of a module it is the amount of data it can put on the switch fabric & the amount of data it can absorb from the fabric. For example if I say a module has a bandwidth of 80Gbps, it means that module can sent 80Gbps of data to the fabric & obtain 80Gbps of data from the fabric. The bandwidth of a module is measured by the bandwidth of the interconnections between the fabric interface & the fabric ASIC

Nexus 7k System Bandwidth Calculation.
(230Gbps/slot) * (8 payload slots) = 1840Gbps
(115Gbps/slot) * (2 supervisor slots) = 230Gbps
(1840 + 230 = 2070Gbps) * (2 for full duplex operation) = 4140Gbps = 4.1Tbps system bandwidth