Il 06/01/2016 7.45, Dan Kenigsberg ha scritto:
On Mon, Jan 04, 2016 at 01:54:37PM +0200, Dan Kenigsberg wrote:
On Mon, Jan 04, 2016 at 12:31:38PM +0100, Stefano Danzi wrote:
I did some tests:

kernel-3.10.0-327.3.1.el7.x86_64 -> bond mode 4 doesn't work (if I detach
one network cable the network is stable)
kernel-3.10.0-229.20.1.el7.x86_64 -> bond mode 4 works fine
Would you be kind to file a kernel bug in
Summarize the information from this thread (e.g. your ifcfgs and in what
way does mode 4 doesn't work).

To get the bug solved quickly we'd better find paying RHEL7 customer
subscribing to it. But I'll try to push from my direction.
Stefano has been kind to open

     Bug 1295423 - Unstable network link using bond mode = 4

which we fail to reproduce on our own lab. I'd be pleased if anybody who
experiences it, and their networking config to the bug (if it is
different). Can you also lay out your switch's hardware and

I made some tests using kernel  3.10.0-327.4.4.el7.x86_64.
I did a TCP dump on virtual interface "DMZ" (VLAN X on bond0).

When I have two netwok cables connected I can se ARP requests but not ARP 
When I detach one network cable I can see ARP requests and ARP replyes (and 
networking on VM works).

Maybe the problem isn't in bonding config but in qemu/kvm/vhost_net....

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