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Subject: [Bug 189234] [em] Big lag with Ethernet Connection I217-V
Date: Mon, 14 Sep 2015 12:12:19 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=189234

--- Comment #8 from Damien <nixuser1980@gmail.com> ---
I will clarify:

I had the same ssh login and input lag.  I also noticed some NFS lag.  I
investigated and found some lost packets (around 20%).  I connected the FreeBSD
box directly to another that supports 1Gbps as opposed to the 100Mbps router
that it was connected to.  I noticed that there were no dropped packets.  I
then set the NIC to 100Mbps and began to see packet loss again as it was with
the router setup before.

I added these comments because my troubleshooting may assist in identifying
that there is a problem with the em driver.  I have confirmed this by
downloading, compiling, and testing the latest em driver from Intel.

I am hoping that the networking team can investigate lost packets at 100 Mbps
for the I217-V NIC and replicate the above troubleshooting steps, and hopefully
get a resolution rather than the workaround that I have presently implemented.

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