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@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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