Have you experienced this? What's going on when this occurs? What do I need to do to keep it from occurring? Please advise. Thanks. Dec 4 10:18:17 localhost kernel: e1000: eth1 NIC Link is Down Dec 4 10:18:19 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX/TX Dec 4 10:18:21 localhost kernel: e1000: eth1 NIC Link is Down Dec 4 10:18:23 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX/TX Dec 4 10:18:24 localhost kernel: e1000: eth1 NIC Link is Down Dec 4 10:18:25 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX/TX Dec 4 10:18:26 localhost kernel: e1000: eth1 NIC Link is Down Dec 4 10:18:28 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX/TX Dec 4 10:18:29 localhost kernel: e1000: eth1 NIC Link is Down Dec 4 10:18:31 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX/TX Dec 4 10:18:37 localhost kernel: e1000: eth1 NIC Link is Down Dec 4 10:18:39 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX/TX Dec 4 10:18:42 localhost kernel: e1000: eth1 NIC Link is Down Dec 4 10:18:43 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX/TX Dec 4 10:19:07 localhost kernel: e1000: eth1 NIC Link is Down Dec 4 10:19:08 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX/TX Dec 4 10:19:13 localhost kernel: e1000: eth1 NIC Link is Down Dec 4 10:19:14 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX/TX Dec 4 10:19:17 localhost kernel: e1000: eth1 NIC Link is Down Dec 4 10:19:19 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX/TX Dec 4 10:19:20 localhost kernel: e1000: eth1 NIC Link is Down -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20101227/ffb15f71/attachment-0001.html>
On Mon, Dec 27, 2010 at 05:22:38PM -0500, E Westphal wrote:> Have you experienced this? What's going on when this occurs? What do I > need to do to keep it from occurring? Please advise. Thanks.could be a bad network switch. or a bad cable on that NIC. Though I wouldn't expect a bad cable to happen with such uniform periodicity (unless there's some physical disturbance that jiggles the cable every 4-5 seconds trigging an intermittent connection.) have you tried just walking around the back of that box and watching the little blinky lights on the back to see if they go OFF every 4-5 seconds for a second or so then come back on? I'd expect either a bad cable or switch to cause them to go off, if they really have disconnected.> > Dec 4 10:18:17 localhost kernel: e1000: eth1 NIC Link is Down > Dec 4 10:18:19 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps > Full Duplex, Flow Control: RX/TX > Dec 4 10:18:21 localhost kernel: e1000: eth1 NIC Link is Down > Dec 4 10:18:23 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps > Full Duplex, Flow Control: RX/TX > Dec 4 10:18:24 localhost kernel: e1000: eth1 NIC Link is Down > Dec 4 10:18:25 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps > Full Duplex, Flow Control: RX/TX > Dec 4 10:18:26 localhost kernel: e1000: eth1 NIC Link is Down > Dec 4 10:18:28 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps > Full Duplex, Flow Control: RX/TX > Dec 4 10:18:29 localhost kernel: e1000: eth1 NIC Link is Down > Dec 4 10:18:31 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps > Full Duplex, Flow Control: RX/TX > Dec 4 10:18:37 localhost kernel: e1000: eth1 NIC Link is Down > Dec 4 10:18:39 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps > Full Duplex, Flow Control: RX/TX > Dec 4 10:18:42 localhost kernel: e1000: eth1 NIC Link is Down > Dec 4 10:18:43 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps > Full Duplex, Flow Control: RX/TX > Dec 4 10:19:07 localhost kernel: e1000: eth1 NIC Link is Down > Dec 4 10:19:08 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps > Full Duplex, Flow Control: RX/TX > Dec 4 10:19:13 localhost kernel: e1000: eth1 NIC Link is Down > Dec 4 10:19:14 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps > Full Duplex, Flow Control: RX/TX > Dec 4 10:19:17 localhost kernel: e1000: eth1 NIC Link is Down > Dec 4 10:19:19 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps > Full Duplex, Flow Control: RX/TX > Dec 4 10:19:20 localhost kernel: e1000: eth1 NIC Link is Down-- ---- Fred Smith -- fredex at fcshome.stoneham.ma.us ----------------------------- The Lord detests the way of the wicked but he loves those who pursue righteousness. ----------------------------- Proverbs 15:9 (niv) -----------------------------
On Mon, Dec 27, 2010 at 5:22 PM, E Westphal <enwestph at rochester.rr.com> wrote:> Have? you experienced this? What's going on when this occurs? What do I need > to do to keep it from occurring? Please advise. Thanks. > > Dec? 4 10:18:17 localhost kernel: e1000: eth1 NIC Link is Down > Dec? 4 10:18:19 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full > Duplex, Flow Control: RX/TX > Dec? 4 10:18:21 localhost kernel: e1000: eth1 NIC Link is Down > Dec? 4 10:18:23 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full > Duplex, Flow Control: RX/TX > Dec? 4 10:18:24 localhost kernel: e1000: eth1 NIC Link is Down > Dec? 4 10:18:25 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full > Duplex, Flow Control: RX/TX > Dec? 4 10:18:26 localhost kernel: e1000: eth1 NIC Link is Down > Dec? 4 10:18:28 localhost kernel: e1000: eth1 NIC Link is Up 100 Mbps Full > Duplex, Flow Control: RX/TX > Dec? 4 10:18:29 localhost kernel: e1000: eth1 NIC Link is DownWhat is the NIC connected to? Have you tried a different switch port or network cable? Does rebooting the server make the problem go away for a bit? It seems like you need to perform some basic troubleshooting and let us know what you have an have no tried. Ryan