Identification of physical network interface in linux

Question

I'm new to linux and I have server with four network cards. I have to identify which physical network interface is assigned to the names eth0, eth1, eth2 and eth3. I have to disconnect cable from eth2 and do not know which network card it is.

Thanks

score 24 · Accepted Answer · answered Sep 24 '13 at 10:20

You can use ethtool.

ethtool -p ethX [N]

ethX – network interface name
[N] – number of second to blink

Example:

ethtool -p eth2 15

This will blink the network interface eth2 for 15 seconds, then you can see which physical network interface is for eth2

score -1 · Answer 2 · edited Sep 28 '13 at 07:25

-1

to check the Physical link in linux, use miitool.

It shows if your network card is connected or not.

edited Sep 28 '13 at 07:25

Falcon Momot

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answered Sep 28 '13 at 07:06

tom

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This will tell you if anything is connected, and the utility can help control the interface, but it is of very little help in differentiating them. A particular feature of `ethtool` which allows manual control of the LEDs is sometimes helpful. – Falcon Momot Sep 28 '13 at 07:28

Identification of physical network interface in linux

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