Re: [ovirt-users] R: Re: Network instability after upgrade 3.6.0 -> 3.6.1

From: "Stefano Danzi" <s.danzi(a)hawai.it&gt; To: "Dan Kenigsberg" <danken(a)redhat.com&gt; Cc: users(a)ovirt.org Sent: Thursday, January 7, 2016 3:53:11 PM Subject: Re: [ovirt-users] R: Re: Network instability after upgrade 3.6.0 -> 3.6.1 Il 07/01/2016 12.18, Stefano Danzi ha scritto: > > > 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 bugzilla.redhat.com? >>> 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 >> https://bugzilla.redhat.com/show_bug.cgi?id=1295423 >> >> 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 >> configuration? >> > > 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 replyes. > 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.... How I can enable a debug log for the bond?

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