network down occasionally and no light is shown on the nic

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dmarz
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Joined: 2014/07/30 09:17:10

network down occasionally and no light is shown on the nic

Post by dmarz » 2014/07/30 09:33:50

Hi,

I need help and tips in solving this issue.

The system is running CentOS 5.9, and its Dell Poweredge T620, with 2 NIC cards.

For one of the NIC card, which is connected to our intranet, sometimes it went down and there is no light on the NIC card. Only when I do a hard reset on the server, then it will be back on again, and after like one day or two, the same thing happen again. ( not able to access the server by other means)

I don't think its the hardware issue, because I have swapped the two nic cards, and always the issue with the nic card that is connected to the intranet.

Any ideas on how to start troubleshooting for this issue? Thanks.

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TrevorH
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Re: network down occasionally and no light is shown on the n

Post by TrevorH » 2014/07/30 09:45:55

Start by posting the output of lspci -nn | grep -i net

I would also recommend that you update to CentOS 5.10 since 5.9 is old and unsupported. Just run yum update to do so.
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

dmarz
Posts: 3
Joined: 2014/07/30 09:17:10

Re: network down occasionally and no light is shown on the n

Post by dmarz » 2014/07/31 05:11:54

This is the output from lspci -nn | grep -i net
06:00.0 Ethernet controller [0200]: Intel Corporation I350 Gigabit Network Connection [8086:1521] (rev 01)
06:00.1 Ethernet controller [0200]: Intel Corporation I350 Gigabit Network Connection [8086:1521] (rev 01)

I have also updated CentOS to 5.10, thanks.

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TrevorH
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Re: network down occasionally and no light is shown on the n

Post by TrevorH » 2014/07/31 08:42:37

Does the update to 5.10 make any difference? How often does this problem occur? Are there any messages in /var/log/messages around the time of the problem?
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

dmarz
Posts: 3
Joined: 2014/07/30 09:17:10

Re: network down occasionally and no light is shown on the n

Post by dmarz » 2014/08/01 04:44:32

it seems that after update, i don't have much issue. I am still monitoring the server, previously is like two days one time this problem will occur. So far, i did not face this issue. thanks.

this was the previous message, message around this was firewall blocking for the other device (eth1)
Jul 29 22:46:02 localhost kernel: igb: eth0 NIC Link is Down

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