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I am trying to figure out whether a performance problem we are having with one of our processes is OS related. I installed CentOS 6.0 on a server which previously had CentOS 6.5 installed. Now when I do ifconfig -a it only shows the loopback address. There are two network cards on the server. And they did show up in the previous version. Any ideas?

EDIT: Adding dmesg and lspci outputs:

dmesg

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  • Could you add output of the "dmesg | grep -i eth" to the question? Also add output of the "lspci -v" related to network cards
    – ALex_hha
    Feb 26, 2014 at 9:29

2 Answers 2

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This is most certainly a driver problem. Is seems centos 6.0's kernel isn't shipped with your card's drivers.

The command lsmod will list you the currently loaded kernel modules among which are the loaded hardware drivers.

Download from here : http://www.broadcom.com/support/license.php?file=NXII/linux-7.6.62.zip and install from USB key if you can.

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  • I installed the drivers. But still the NICs don't show up.
    – nakiya
    Feb 27, 2014 at 3:17
  • Still nothing new in dmesg ? weird. Try to load modules manually with modprobe maybe ?
    – mveroone
    Feb 27, 2014 at 8:24
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The necessary driver tg3 doesn't appear to have been present in RHEL/CentOS 6.0. The first release in which it documented as present is 6.1. And the current 6.x version at the time of your post was 6.5. Update your system.

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