How do I determine which eth i/f is which?

How do I determine which eth i/f is which?

I need a way to determine which interface is assigned to which eth*.
For example,
which NIC i/f is assigned to eth0 ... and
which NIC i/f is assigned to eth1.

Can I physically disable eth0 (or eth1) from a terminal and then look
at the LED's on the back to determine which is which?

Thanks!

.............. OK, I figured it out...
I just had a "eureka"
moment........

To solve this problem.....

Just ping the interface and watch the LED's blink 'like a christmas
tree'.

The NIC interface that has LED's blinking will be the one that is
related to the IP and MAC address (and eth number).

I haven't tried it yet, but it should work to solve this problem.

Thanks!

On Sat, 25 Mar 2006 13:10:04 -0800, (E-Mail Removed) wrote:

> How do I determine which eth i/f is which?
>
> I need a way to determine which interface is assigned to which eth*.
> For example,
> which NIC i/f is assigned to eth0 ... and
> which NIC i/f is assigned to eth1.
>
> Can I physically disable eth0 (or eth1) from a terminal and then look
> at the LED's on the back to determine which is which?
>
> Thanks!
>
ethtool -i eth0
ethtool -i eth1
lspci

--
Douglas Mayne

In comp.os.linux.networking (E-Mail Removed) <(E-Mail Removed)>:
> How do I determine which eth i/f is which?

> I need a way to determine which interface is assigned to which eth*.
> For example,
> which NIC i/f is assigned to eth0 ... and
> which NIC i/f is assigned to eth1.

> Can I physically disable eth0 (or eth1) from a terminal and then look
> at the LED's on the back to determine which is which?

If supported by nic/driver run this and unplug the cable while
running and you should know:

mii-tool -w eth2
10:30:28 eth2: negotiated 100baseTx-FD, link ok
10:30:37 eth2: no link

BTW
Please try below URL(s) before answering, most people aren't
using a browser here to read/write, this is usenet.

http://www.safalra.com/special/googlegroupsreply
http://cfaj.freeshell.org/google


--
Michael Heiming (X-PGP-Sig > GPG-Key ID: EDD27B94)
mail: echo (E-Mail Removed) | perl -pe 'y/a-z/n-za-m/'
#bofh excuse 180: ether leak