ethtool  swp1
Settings for swpl :
        Supported ports: [ FIBRE ]
        Supported Iink modes:  400000baseSR8/Ful1
                               400000baseDR8/Full
                               400000baseCR8/Full
        Supported pause frame use : Symmetric
        Supports auto-negotiation : Yes
        Supported FEC modes : None      RS       BASER
        Advertised Iink modes :400000baseSR8/Full
                               400000baseDR8/Full
                               400000baseCR8/Full
        Advertised pause frame use : Symmetric
        Advertised auto-negotiation : Yes
        Advertised FFC modes : Not reported
        Speed : 200000Mb/s
        Duplex : Full
        Auto-negotiation : on
        Port : Direct Attach Copper
        PHYAD : 0
        Transceiver : internal
netlink error : Operation not permitted
        Link detected : yes
admin@cumulus : mgmt : ~$