Forcing Speed and Duplex of on-board network interface e1000g on T2000, T5120, and T5220 with ndd

By default the e1000g network interface is set to auto-negotiation enabled, 1Gbps full-duplex.

ndd -set /dev/e1000g<instance> adv_autoneg_cap 0
ndd -set /dev/e1000g<instance> force_speed_duplex <value>

ValueSetting Result
110Mb/s, half-duplex
210Mb/s, full-duplex
3100Mb/s, half-duplex
4100Mb/s, full-duplex

I found this while reading the hardware platform guide for T5120. “force_speed_duplex” is not available for other types of network interfaces.

– See more at: http://serviceitdirect.com/blog/forcing-speed-and-duplex-board-network-interface-e1000g-t2000-t5120-and-t5220-ndd#sthash.XdwDff1R.dpuf


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