Packet corruption in re0

Eric L. Chen d9364104 at
Thu Feb 21 05:44:46 UTC 2008

On Thu, 2008-02-21 at 11:03 +1000, Robert Backhaus wrote:
> I am experiencing roughly 15% packet corruption on the re interface on
> my freebsd 7/amd64  box.
> Tue Feb  5 09:49:55 EST 2008
> root at  amd64
> The attached 3 files demonstrate the problem: "ping" shows the output
> of ping -c 100, and shows 15% packet loss. "tcpdump" shows the packets
> leaving, and some of the lost packets being returned with addresses,
> ports and data corrupted. The data in these packets seems to be coming
> from other packets passing through other interfaces at the time.
> "remote-tcpdump" shows the packets being received and returned from
> the other machine. Note that some packets are being corrupted on the
> way out, too.
> Just to make troubleshooting difficult, this problem only shows up
> after the system has been up for roughly 36 hours, depending on the
> amount of traffic.
> I am using the latest bios that I am aware of. The bios that I
> recently applied did include a firmware update for the realtek
> interface, but this did not affect the problem.
> _______________________________________________

I disabled some hw features and works fine.
like this (/etc/rc.conf)
ifconfig_re0="inet  netmask -rxcsum -txcsum
-tso -lr


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