Mellanox SN2410: 100G link over a 2 m QSFP28 copper cable to a Chelsio adapter never comes up with FEC off
On a Mellanox SN2410 (MLNX-OS 3.6.4112) a 100G port connected to a Chelsio adapter through a 2 m unequalised QSFP copper cable would not link when FEC was disabled; no HSS lane signal was detected on the adapter side. The poster required FEC-off operaation and asked whether the switch supports it…