11-12-2008
Thanks for the response. I did start reading those 2 sites.
I was also interested in people's opinions and experiences of any of the technologies surrounding Linux High Performance Clusters and parallel filesystems.
Is anybody out there using these technologies in production and what kinds of things are they doing and how?
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LEARN ABOUT REDHAT
mii-tool
MII-TOOL(8) System Manager's Manual 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 ...]
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 spec-
ified 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.
AUTHORS
David Hinds - dhinds@pcmcia.sourceforge.org
Donald Becker - becker@scyld.com
net-tools 2000/04/25 22:58:19 MII-TOOL(8)