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ConnectX-4 MCX456A-ECAT will not link to a Cisco NCS on 100GBASE-LR4 while loopback passes on both ends
We run a pair of racks that hand off to a carrier-facing Cisco NCS, and one of the 100G server uplinks has never come up since the build. Same result after moving the server to another cabinet with a different patch panel, so I have stopped treating it as a one-off. Supermicro server…
