Configures speed of gigabit uplink interface speed-auto(1): the system configures uplink speed according to plugged-in transceiver module, if a 1Gbps only transceiver detected then interface speed 1Gbps is configured if a 10Gbps only transceiver detected then interface speed 10Gbps is configured speed-1G-full(2): the system configures interface speed to 1Gbps and full duplex once a dual speed transceiver SFP+ module plugged in, otherwise configure it according to transceiver's speed. speed-2500M-full(3):the system configures interface speed to 2.5Gbps and full duplex once a dual speed transceiver SFP+ module plugged in, otherwise configure it according to transceiver's speed. speed-10G-full(4): the system configures interface speed to 10Gbps and full duplex once a dual speed transceiver SFP+ module plugged in, otherwise configure it according to transceiver's speed. speed-100M-full(5): for GLC card interface only and not for gigabit uplink interface speed-100M-half(6): for GLC card interface only and not for gigabit uplink interface Default: speed-auto(1) Reference: SFF-8472 Rev 11.0 (ftp://ftp.seagate.com/sff)