Hello,
I’m using the Fedora 23 disturb, with recent kernel on all of my systems ( VMs and
Physicals), I see the rx packet dropped only on VMs when I disable the virtio-net driver ,
by adding driver name=‘emu’ in the XML.
But indeed if I started the tcpdump, the dropped stopped.
Patrick
On 26 Jan 2016, at 20:51, Troels Arvin <troels(a)arvin.dk>
wrote:
pichon wrote:
Hello,
pichon wrote:
> On each of my guests VM, I see constantly a RX dropped number increasing
> , Even if the VM does nothing !
I'm seeing the same phenomenon on one of our LANs (on another LAN, I
don't see it). My setup is with RHEL 7, and it is seen on both physical
and virtual servers. I don't see it on any RHEL 5 or 6 servers.
A strange observation: If I start tcpdump, the package drops stop.
(Setting the NIC in promisc mode does not have any impact; it has to be
tcpdump.)
I suspect that it has to do with this:
https://www.netiq.com/support/kb/doc.php?id=7007165
If this is the case, it's simply because recent kernels classify packets,
and then there's nothing to worry about.
- But Red Hat Support does not share that view. I have an open case with
Red Hat Support about it; lots of stuff has been tried, but we have yet
to reach a conclusion.
--
Troels
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