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Check if network cable is plugged in and working correctly

Terminal - Check if network cable is plugged in and working correctly
mii-tool eth0
2009-06-24 08:43:55
User: flart
6
Check if network cable is plugged in and working correctly

with 'mii-tool -w eth0' you can watch the interface for changes of the link status

Alternatives

There are 2 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

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What others think

Hmm. I don't know, but I get a little problem with it on my laptop:

sudo mii-tool eth1

SIOCGMIIPHY on 'eth1' failed: Operation not supported

Does it not work on WiFi connections? (Probably a stupid question, since it says "network cable")

Comment by kaedenn 266 weeks and 1 day ago

mii is an acronym from the older days when an ethernet card could support multiple physical interfaces (as in twisted pair RJ-45, or coax) and there was a "medium independent interface" layer. I don't know why it doesn't work for your wireless interface, but I know you can use mii-tool to turn off autonegotiation on a wired link for example and force communication at 10 mpbs rather than 100 mpbs or 1gbps. It would save power just like CPU frequency scaling does.

Comment by bwoodacre 266 weeks ago

sudo ethtool eth0

"mii-tool" comand was replaced by "ethtool" command.

Comment by Playload 266 weeks ago

"mii-tool" is indeed pretty buggy and deprecated nowadays. "ethtool" is preferred. Especially when dealing with Gigabit NICs mii-tool is showing wrong information and doing the wrong thing on several brands of NICs.

Comment by Signum 265 weeks and 6 days ago

Your point of view

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