Hello, For me it makes sense that the dropped stop when you are using tcpdump as you are indeed takes those packets ! For me the main question, is why such traffic is going to the VM ? Kind regards 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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