mii-tool  -  view,  manipulate media-independent interface
       status


SYNOPSIS

       mii-tool [-v, --verbose]  [-V,  --version]  [-R,  --reset]
       [-r,  --restart]  [-w,  --watch] [-l, --log] [-A, --adver­
       tise=media,...]  [-F, --force=media] [interface ...]


DESCRIPTION

       This utility checks or sets the status of a network inter­
       face's  Media Independent Interface (MII) unit.  Most fast
       ethernet adapters use an MII to autonegotiate  link  speed
       and duplex setting.

       Most  intelligent  network  devices use an autonegotiation
       protocol to communicate what media technologies they  sup­
       port, and then select the fastest mutually supported media
       technology.  The -A or --advertise options can be used  to
       tell  the  MII to only advertise a subset of its capabili­
       ties.  Some passive devices, such  as  single-speed  hubs,
       are  unable to autonegotiate.  To handle such devices, the
       MII protocol also allows for establishing a link by simply
       detecting  either a 10baseT or 100baseT link beat.  The -F
       or --force options can be used to force the MII to operate
       in  one  mode,  instead of autonegotiating.  The -A and -F
       options are mutually exclusive.

       The default short output reports the negotiated link speed
       and  link  status  for each interface.  If an interface or
       interfaces are not specified on  the  command  line,  then
       mii-tool  will  check  any  available interfaces from eth0
       through eth7.


OPTIONS

       -v, --verbose
              Display more detailed MII status  information.   If
              used twice, also display raw MII register contents.

       -V, --version
              Display program version information.

       -R, --reset
              Reset the MII to its default configuration.

       -r, --restart
              Restart autonegotiation.

       -w, --watch
              Watch interface(s) and report changes in link  sta­
              tus.   The  MII interfaces are polled at one second
              intervals.

              Used with -w, records link status  changes  in  the
              system  log instead of printing on standard output.

       -F media, --force=media
              Disable  autonegotiation,  and  force  the  MII  to
              either  100baseTx-FD,  100baseTx-HD, 10baseT-FD, or
              10baseT-HD operation.

       -A media,..., --advertise=media,...
              Enable and restart autonegotiation,  and  advertise
              only  the  specified  media technologies.  Multiple
              technologies should be separated by commas.   Valid
              media  are  100baseT4,  100baseTx-FD, 100baseTx-HD,
              10baseT-FD, and 10baseT-HD.


AUTHORS

       David Hinds - dhinds@pcmcia.sourceforge.org
       Donald Becker - becker@scyld.com


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