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



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


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


NOTE
       This  program  is obsolete. Valid media are only 100baseT4, 100baseTx-
       FD,100baseTx-HD,	 10baseT-FD  and  10baseT-HD  ethernet	 cards.	  For
       replacement check eth-tool.


DESCRIPTION
       This  utility checks or sets the status of a network interface'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 support, 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
       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  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 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 technologies.  Multiple technologies should  be
	      separated	 by commas.  Valid media are 100baseT4, 100baseTx-FD,
	      100baseTx-HD, 10baseT-FD, and 10baseT-HD.


SEE ALSO
       ethtool(8)


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



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

UNIX/Linux commands referenced on this page:

1. view
2. link
3. as
4. more
5. display
6. raw
7. at