On Mon, Oct 03, 2005 at 01:12:18PM -0500, Nate Carlson wrote:
> On Mon, 3 Oct 2005, Nate Straz wrote:
> >I would trust mii-tool over dmesg. mii-tool tells you the current
> >status of the link. dmesg just shows you the kernel message buffer, so
> >you don't really know how old the message is until you look it up in
> >/var/log/message (or equiv).
>
> Better yet: ethtool!
For something as simple as this, mii-tool. ethtool has one of the most
useless usage messages. Compare:
/sbin/mii-tool: invalid option -- h
usage: /sbin/mii-tool [-VvRrwl] [-A media,... | -F media] [interface ...]
-V, --version display version information
-v, --verbose more verbose output
-R, --reset reset MII to poweron state
-r, --restart restart autonegotiation
-w, --watch monitor for link status changes
-l, --log with -w, write events to syslog
-A, --advertise=media,... advertise only specified media
-F, --force=media force specified media technology
media: 100baseT4, 100baseTx-FD, 100baseTx-HD, 10baseT-FD, 10baseT-HD,
(to advertise both HD and FD) 100baseTx, 10baseT
ethtool version 2
Usage:
ethtool DEVNAME
ethtool -a DEVNAME
ethtool -A DEVNAME \
[ autoneg on|off ] \
[ rx on|off ] \
[ tx on|off ]
ethtool -c DEVNAME
ethtool -C DEVNAME \
[adaptive-rx on|off] \
[adaptive-tx on|off] \
[rx-usecs N] \
[rx-frames N] \
[rx-usecs-irq N] \
[rx-frames-irq N] \
[tx-usecs N] \
[tx-frames N] \
[tx-usecs-irq N] \
[tx-frames-irq N] \
[stats-block-usecs N] \
[pkt-rate-low N] \
[rx-usecs-low N] \
[rx-frames-low N] \
[tx-usecs-low N] \
[tx-frames-low N] \
[pkt-rate-high N] \
[rx-usecs-high N] \
[rx-frames-high N] \
[tx-usecs-high N] \
[tx-frames-high N] \
[sample-interval N]
ethtool -g DEVNAME
ethtool -G DEVNAME \
[ rx N ] \
[ rx-mini N ] \
[ rx-jumbo N ] \
[ tx N ]
ethtool -i DEVNAME
ethtool -d DEVNAME [ raw on|off ]
ethtool -e DEVNAME \
[ raw on|off ] \
[ offset N ] \
[ length N ]
ethtool -E DEVNAME \
[ magic N ] \
[ offset N ] \
[ value N ]
ethtool -k DEVNAME
ethtool -K DEVNAME \
[ rx on|off ] \
[ tx on|off ] \
[ sg on|off ] \
[ tso on|off ]
ethtool -r DEVNAME
ethtool -p DEVNAME [ %d ]
ethtool -t DEVNAME [online|(offline)]
ethtool -s DEVNAME \
[ speed 10|100|1000 ] \
[ duplex half|full ] \
[ port tp|aui|bnc|mii|fibre ] \
[ autoneg on|off ] \
[ phyad %d ] \
[ xcvr internal|external ] \
[ wol p|u|m|b|a|g|s|d... ] \
[ sopass %x:%x:%x:%x:%x:%x ] \
[ msglvl %d ]
ethtool -S DEVNAME