I just installed CentOS 6.3 on a Tyan motherboard and the NIC stopped talking after about 2 days of operation. It's connected to a Cisco 2950 switch. /var/log/messages has this in it: nv_stop_tx: TransmitterStatus remained busy I simply did an "ifdown eth0" and "ifup eth0" to bring it back to life again. I think I have this issue: <http://www.centos.org/modules/newbb/viewtopic.php?topic_id=18183> Is this a regression? Any suggestions on what I can try here?