Hi,
I am seeing random packet loss with this hardware in Linux:
Ethernet controller: Intel Corporation 82567LM-3 Gigabit Network Connection
(rev 02)
Device: HP Compaq 8000 Elite CMT PC
BIOS is latest: Version: 786G7 v01.14
The issue is exactly the same that this old post for 82579LM:
https://sourceforge.net/p/e1000/mailman/message/30922613/
On high load (around 20 Mbps), while linked at 1Gbps, random received packets
are dropped. To make things worse, any of counters viewed either via ethtool -S
or netstat -s does not show any problems (errors and drops 0).
I can see that indeed there are packet loss using SPAN in the switch and a
sniffer. I see all packets sent to Linux ethernet port but Linux doesn't see
some of these packets in tcpdump. They are lost, silently.
Testing this problem showed that changing link to 100 Mbps solves the issue. So
the problem is only present when linked at 1 Gbps, although the traffic is the
same (around 20 Mbps).
I have manually compiled latest e100e drivers, version 3.3.3 and also tried
with different Linux kernels (currently at 4.5.5).
I tried the patch and solution for 82579 but it doesn't solve this problem for
82567 (I don't even think 82567 card has K1 power optimization).
Any help would be greatly appreciated for this issue.
Regards,
Carlos Velasco
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