The server has more than one network card, how to determine which NIC is equipped with

Today, a small white problem, the new server after the CentOS system installed, to configure the network. Server has four network card, I put the network cable into the first network card, the network card corresponding to the eth0 or eth1-3. Just put the eth0 point to configure the restart network card to find Ping does not go out. and put the same configuration on the eth1, through ... Later I found this problem very tangled, in the virtual machine will not encounter this problem. Finally found a tool ethtool

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Ethtool-p eth0 10

After the operation, see which network card LED lights in the Flash, eth0 corresponding to which block card.

I wonder if you've met this little white question.

The server has more than one network card, how to determine which NIC is equipped with