I have checked the physical connectivity which is perfectly
fine. This machine is very critical which we need to keep running as much
as possible. So I had gone to older kernel 2.6.18-92.1.17.el5. But along
with this kernel, I had added one more Dlink ethernet card which shows to
be
05:09.0 Ethernet controller: D-Link System Inc DGE-530T Gigabit Ethernet Adapter (rev 11) (rev 11)
and it uses the skge driver.
So I could test the machine with this new card and
kernel-2.6.18-92.1.17.el5 togather. Still I do get the network breaks but
the frequency reduced to factor of Ten. The corresponding messages seen in
the /var/log/messages are as follow.
Apr 21 10:18:32 kernel: skge eth1: Link is down.
Apr 21 10:18:36 kernel: skge eth1: Link is up at 1000 Mbps, full duplex, flow control none
Apr 21 10:18:55 kernel: skge eth1: Link is down.
Apr 21 10:18:57 kernel: skge eth1: Link is up at 1000 Mbps, full duplex, flow control none
Apr 21 10:18:58 kernel: skge eth1: Link is down.
Apr 21 10:19:01 kernel: skge eth1: Link is up at 1000 Mbps, full duplex, flow control none
Regards,
Mangesh
On Tue, 21 Apr 2009, D Tucny wrote:
> 2009/4/21 Mangesh S. Umbarje <mangesh at gmrt.ncra.tifr.res.in>
> Dear All,
>
> I am having a HP xw4400 with following ethernet controller
> as reported by lspci
>
> Broadcom Corporation NetXtreme BCM5755 Gigabit Ethernet PCI Express (rev 02)
>
> This machine was running CentOS 5.2 without any problem. After
> updating the machine with yum update on 8 April, after which it is showing
> to be CentOS 5.3, this machine stops communicating intermittantly and I
> see the following message correspondingly in /var/log/messages
>
> Apr 18 10:30:07 kernel: tg3: eth0: Link is down.
> Apr 18 10:30:10 kernel: tg3: eth0: Link is up at 1000 Mbps, full duplex.
> Apr 18 10:30:10 kernel: tg3: eth0: Flow control is off for TX and off for RX.
> Apr 18 10:30:24 kernel: tg3: eth0: Link is down.
>
>
> etc...
>
>
> The interval for which it happens is about order of few minutes.The
> kernel it is running now is 2.6.18-128.1.6.el5. Can anybody help.
>
>
> Have you tried running with the old kernel from before the update to verify that it doesn't occur with that version?
>
> It is possible that the update is just a coincidence and you are actually facing link problems due to the card, the
> cable, the switch or any of the connections between...
>
> d
>
>