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33 .Nd 3Com 3XP Typhoon/Sidewinder (3CR990) Ethernet interface
39 interface provides access to the 10Mb/s and 100Mb/s Ethernet networks via the
41 .Tn Typhoon/Sidewinder
44 Basic Ethernet functions are provided as well as support for
46 tag removal and insertion assistance, receive
56 There is currently no support for
66 Note that hardware checksumming is only used when the interface is not
71 Each of the host's network addresses
72 is specified at boot time with an
77 interface employs the address resolution protocol described in
79 to dynamically map between Internet and Ethernet addresses on the local
84 interface is brought up, by default, it will attempt to auto-negotiate the
85 link speed and duplex mode.
86 The speeds, in order of attempt, are:
87 100Mb/s Full Duplex, 100Mb/s Half Duplex, 10 Mb/s Full Duplex, and
92 supports several media types, which are selected via the
95 The supported media types are:
96 .Bl -tag -width indent
97 .It Cm media autoselect
98 Attempt to autoselect the media type (default)
99 .It Cm media 100baseTX mediaopt full-duplex
100 Use 100baseTX, full duplex
101 .It Cm media 100baseTX Op Cm mediaopt half-duplex
102 Use 100baseTX, half duplex
103 .It Cm media 10baseT mediaopt full-duplex
104 Use 10baseT, full duplex
105 .It Cm media 10baseT Op Cm mediaopt half-duplex
106 Use 10baseT, half duplex
111 driver supports the following cards:
113 .Bl -bullet -offset indent -compact
141 driver first appeared in