Random Network Drops on Realtek Interfaces (re)

Pyun YongHyeon pyunyh at gmail.com
Tue Sep 22 20:01:46 UTC 2009

On Mon, Sep 21, 2009 at 11:25:17PM -0600, Cassidy Larson wrote:
> All,
> I've been experiencing an intermittent issue with a drop in networking
> connectivity on a couple of boxes.
> At random times I drop connectivity between the servers and their
> gateway. I am able to login via the secondary interface and
> "/etc/netstart" and everything starts behaving as normal. My switch
> shows the link is up, ifconfig shows the link is up, but I am unable
> to ping my gateway until running "/etc/netstart".  Somedays it'll
> happen a few times an hour, some days once every 8-10 hours. It really
> is intermittent, and driving me crazy trying to track down the issue.
> I've tried different cables, switches, gateways, IPs, and locations.
> Memtest for 5 days showed no errors. However, the same problem exists
> on two separate installs at different times.  I am able to connect to
> the one server from the second via their secondary interfaces, so the
> problem isn't related to both network interfaces.
> Both servers have the Supermicro X7SLM-L motherboard, same CPU, RAM
> and disks.  Using the Realtek network driver (re). pciconf shows:
>     vendor     = 'Realtek Semiconductor'
>     device     = 'Gigabit Ethernet NIC(NDIS 6.0) (RTL8168/8111)'
>     class      = network
>     subclass   = ethernet
> I've experienced the problem for some time now on both 7.2-RELEASE and
> 7.2-STABLE (09/20/09) using amd64.
> Any help or suggestions would be useful in getting to the bottom of this.
> Thanks,

By chace can you find any messages in dmesg reported by re(4)?
dmesg output related to re(4) would be more helpful as RealTek
controllers used to show same device ids.

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