sonic-buildimage/device/dell/x86_64-dellemc_z9432f_c3758-r0/DellEMC-Z9432f-O32/platform-def.json

{
    "fec-mode": {
        "Ethernet0-255": {
            "1": {
                 "10000":  [ "none" ],
                 "25000":  [ "none", "fc", "rs" ],
                 "50000":  [ "rs" ]
            },
            "2":{
                 "50000":  [ "none", "fc", "rs" ],
                 "100000": [ "rs" ]
            },
            "4": {
                 "40000":  [ "none" ],
                 "100000": [ "none", "rs" ],
                 "200000": [ "rs" ]
            },
            "8": [ "rs" ]
        }
    },
    "default-fec-mode": {
        "Ethernet0-255": {
            "1": {
                 "10000": "none",
                 "25000": "none",
                 "50000": "rs"
            },
            "2": {
                 "20000": "none",
                 "50000": "none",
                 "100000": "rs"
            },
            "4": {
                 "40000":  "none",
                 "100000": "none",
                 "200000": "rs"
            },
            "8": "rs"
        }
    },
    "native-port-supported-speeds": {
        "Ethernet0-255": {
            "8": ["400000"]
        },
        "Ethernet256-257": {
            "1": ["10000","1000"]
        }
    }
}