> The next question is probably why is it reported as 2x2x100G? At a certain size you don't want 1x100G in case one link breaks, so for a large company they ge

> The next question is probably why is it reported as 2x2x100G? At a certain size you don't want 1x100G in case one link breaks, so for a large company they get 2x100G with each fibre going to a separate router. If one router goes down (planned or unplanned) you don't go offline. So now they probably added a second redundant pair. You can see SIX's gear here: * https://www.seattleix.net/topology https://www.seattleix.net/topology They have two Arista 7500-series chassis switches, one 8U and the other 12U (amongst other things): * https://www.arista.com/assets/data/pdf/Datasheets/7500RDataSheet.pdf https://www.arista.com/assets/data/pdf/Datasheets/7500RDataS... One of the line card options is 7500R-36CQ, which can handle thirty-six 100G ports.