Pedro, To answer your direct question: from the 3200 Hardware Guide... "Palo Alto Networks recommends that you use a passive SFP+ cable." Part Number: PAN-SFP-PLUS-CU-5M "For installations where the two firewalls are not near each other and you cannot use a passive SFP+ cable, use a standard SFP+ transceiver and the appropriate cable length." Choose an SFP+ transceiver based on distance and cable type: PAN-SFP-PLUS10GBASE-T, PAN-SFP-PLUS-ER, PAN-SFP-PLUS-LR, or PAN-SFP-PLUS-SR. Info obtained from PAN Optics and Transceivers
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