I've had nothing but absolutely pleasant dealings with Hamid. That said, I have a couple contacts in Cisco Engineering that run serial numbers from time to time (and for that I must remember to fire off a bottle of something nice to him soon) and all the switches, GBICs, SFPs and router cards I've bought off ebay for my personal abuse have checked out. Except the PA-FE-FX, which we couldn't identify the serial number of..
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