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This is a 3-meter passive copper direct attach cable with QSFP+ connectors on both ends, built for 40GbE links between switches, servers and storage. Passive copper is the cheapest and lowest-latency way to run short 40G runs inside a rack or between adjacent racks, and it draws no power and adds no active electronics to fail. It suits data center and lab builds linking Extreme switches or any QSFP+ ports, but it is a fixed 3-meter assembly, so plan rack layout before buying. Compared with active optical cables it is cheaper and cooler but limited to short distances; compared with generic DACs, the Extreme part number is the one guaranteed to be supported and warrantied in Extreme gear.
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Lowest price we've seen: $64.03 on Nov 11 at Amazon. Tracked across 1 store since Nov 11.
This is a 40GbE QSFP+ to QSFP+ direct attach cable from Extreme Networks. It is a passive copper cable that is 3 meters long.
