Port Ethernet sync commands for 7210 SAS-D ETR, 7210 SAS-Dxp, 7210 SAS-K 2F1C2T, 7210 SAS-K 2F6C4T, and 7210 SAS-K 3SFP+ 8C

config 
    - [no] port {port-id}
        - ethernet
            - no port-clock 
            - port-clock {master | slave | automatic}
            - ssm
                - [no] shutdown
                - [no] code-type sonet | sdh
                - [no] tx-dus