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MII-TOOL(8)									      MII-TOOL(8)

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

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

       This utility checks or sets the status of a network interface's Media  Independent  Inter-
       face  (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  support, and then select the fastest mutually supported media technol-
       ogy.  The -A or --advertise options can be used to tell the MII to only advertise a subset
       of  its	capabilities.	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 inter-
       face.  If an interface or interfaces are not specified on the command line, then  mii-tool
       will check any available interfaces from eth0 through eth7.

       -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  status.	The  MII  interfaces  are
	      polled at one second intervals.

       -l, --log
	      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 tech-
	      nologies.  Multiple technologies should be separated by commas.	Valid  media  are
	      100baseT4, 100baseTx-FD, 100baseTx-HD, 10baseT-FD, and 10baseT-HD.

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

net-tools			       2000/04/25 22:58:19			      MII-TOOL(8)
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