HME(4)                OpenBSD Programmer's Manual (SPARC)               HME(4)

NAME
     hme - SPARC National DP83840 ethernet interface

SYNOPSIS
     hme* at sbus? slot ? offset ?                  (sun4c/sun4m)
     nsphy* at mii? phy ?                           (sun4c/sun4m)
     qsphy* at mii? phy ?                           (sun4c/sun4m)

DESCRIPTION
     The hme interface provides access to the 10Mb/s and 100Mb/s Ethernet net-
     works via the National DP83840 Ethernet 10/100 Mb/s Physical Layer or the
     Quality QS6612 Ethernet MII Transceiver for Category 5 Twisted Pair Cable
     chip sets.  The hme is found on the SunSwift and Sun QuadFastEthernet
     boards.

     Each of the host's network addresses is specified at boot time with an
     SIOCSIFADDR ioctl(2). The hme interface employs the address resolution
     protocol described in arp(4) to dynamically map between Internet and Eth-
     ernet addresses on the local network.

     When a hme interface is brought up, by default, it will attempt to auto-
     negotiate the link speed and duplex.  The speeds, in order of attempt,
     are: 100Mb/s Full Duplex, 100Mb/s Half Duplex, 10 Mb/s Full Duplex, and
     10 Mb/s Half Duplex.

     The hme supports several media types, which are selected via the ifcon-
     fig(8) command.  The supported media types are:

           media autoselect
                           Attempt to autoselect the media type (default)

           media 100baseTX mediaopt full-duplex
                           Use 100baseTX, full duplex

           media 100baseTX [mediaopt half-duplex]
                           Use 100baseTX, half duplex

           media 10baseT mediaopt full-duplex
                           Use 10baseT, full duplex

           media 10baseT [mediaopt half-duplex]
                           Use 10baseT, half duplex

SEE ALSO
     arp(4), be(4), ie(4), ifmedia(4), inet(4), intro(4), le(4), ifconfig(8)

HISTORY
     OpenBSD support for the hme first appeared in OpenBSD 2.4.

OpenBSD 3.0                      July 12, 1998                               1
