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Download man pages section 7: Device and Network Interfaces
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bge(7D) Once in the DL_ATTACHED state, you must send a DL_BIND_REQ to associate a particular Service Access Point (SAP) with the stream. CONFIGURATION By default, the bge driver performs auto-negotiation to select the link speed and mode. Link speed and mode can be any one of the following, (as described in the IEEE803.2 standards): ■ ■ ■ ■ ■ ■ 1000 Mbps, full-duplex 1000 Mbps, half-duplex 100 Mbps, full-duplex 100 Mbps, half-duplex 10 Mbps, full-duplex 10 Mbps, half-duplex The auto-negotiation protocol automatically selects: ■ ■ Speed (1000 Mbps, 100 Mbps, or 10 Mbps) Operation mode (full-duplex or half-duplex) as the highest common denominator supported by both link partners. Because the bge device supports all modes, the effect is to select the highest throughput mode supported by the other device. Alternatively, you can set the capabilities advertised by the bge device using ndd(1M). The driver supports a number of parameters whose names begin with adv_ (see below). Each of these parameters contains a boolean value that determines whether the device advertises that mode of operation. In addition, the adv_autoneg_cap parameter controls whether autonegotiation is performed. If adv_autoneg_cap is set to 0, the driver forces the mode of operation selected by the first non-zero parameter in priority order as listed below: adv_1000fdx_cap adv_1000hdx_cap adv_100fdx_cap adv_100hdx_cap adv_10fdx_cap adv_10hdx_cap (highest priority/greatest throughput) 1000Mbps full duplex 1000Mpbs half duplex 100Mpbs full duplex 100Mpbs half duplex 10Mpbs full duplex 10Mpbs half duplex (lowest priority/least throughput) For example, to prevent the device ’bge2’ from advertising gigabit capabilities, enter (as super-user): # ndd -set /dev/bge2 adv_1000hdx_cap 0 # ndd -set /dev/bge2 adv_1000fdx_cap 0 All capabilities default to enabled. Note that changing any capability parameter will cause the link to go down while the link partners renegotiate the link speed/duplex using the newly changed capabilities. 66 man pages section 7: Device and Network Interfaces • Last Revised 22 Jun 2002
