It can be complicated. When you are sourcing parts in bulk for manufacturing the price needs to be negotiated through a personal relationship. It could be the c

It can be complicated. When you are sourcing parts in bulk for manufacturing the price needs to be negotiated through a personal relationship. It could be the case that the vendors making parts for Cisco do not want to endanger their existing business relationship and will not sell (or insist on a heft markup), it could also be the case that the counterfeiters have better connections with a different supplier who is willing to give them a better unit price (large corporations can typically negotiate a better unit price since they can guarantee larger and more consistent volumes). There are a lot of potential reasons why you might want to swap a component.