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