Hi,

F25 is deprecated.  You should upgrade to F27 at least.  The current stable version of Fedora is 28.
Besides that, did you check is not a problem from your provider?  Time ago I had a lot of packet dropping and after weeks kicking everything I found out it was my ISP's fault.
Another thing I would check is hardware issues.
Hope this helps.

Kind regards,
Silvia



On 25 May 2018 at 02:43, Alex <mysqlstudent@gmail.com> wrote:
Hi,

Can someone explain why an interface would start showing dropped
packets and overruns? I have about six machines on a local LAN (the IP
is associated with the br0 device), and all have at least some amount
of dropped packets. This is one example from one of the machines on
the LAN; the LAN interface on the gateway machine is very similar.

eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::ec4:7aff:fe7a:73f4  prefixlen 64  scopeid 0x20<link>
        ether 0c:c4:7a:7a:73:f4  txqueuelen 1000  (Ethernet)
        RX packets 2294973231  bytes 1227551884960 (1.1 TiB)
        RX errors 0  dropped 159933  overruns 2252  frame 0
        TX packets 2707484667  bytes 1948072588485 (1.7 TiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device memory 0xc7200000-c727ffff

I recently rebooted the gateway and noticed it there first. It's a
fedora25 system acting as a gateway with shorewall. The LAN side is a
1Gbs ethernet on a gigabit switch. The WAN side is a 10mbit ethernet
link in a colo. I suspect this machine is the cause, as nothing's
changed on the LAN machines for a while, and the dropped packet count
isn't incrementing fast enough to coincide with greater than 1TB of
traffic.

I have IPMI access to the machines on the LAN, so can do testing, but
I don't have IPMI access to the gateway, so can't really do much
without having to drive to the colo first.

What's the typical cause of these errors? I thought it was perhaps the
duplex mode or other link setting, but they all appear to be the same
(1000/full).

There aren't any dropped packets or overruns on the WAN interface on
the gateway, but could some signal or other data from the WAN side be
causing this?

I can run wireshark or something similar, but it's been a while, so if
that's your recommendation, I'd really appreciate it if you could
provide specific traces you'd think were best.

Ideas greatly appreciated.
Thanks,
Alex
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