On Wed, Jul 29, 2015 at 12:00:38PM +0200, NUNIN Roberto wrote: > > > -----Messaggio originale----- > > Da: users-boun...@ovirt.org [mailto:users-boun...@ovirt.org] Per conto di > > Michael S. Tsirkin > > Inviato: giovedì 9 luglio 2015 15:15 > > A: Fabian Deutsch > > Cc: users@ovirt.org > > Oggetto: Re: [ovirt-users] R: R: R: R: R: R: PXE boot of a VM on vdsm don't > > read > > DHCP offer > > > > On Thu, Jul 09, 2015 at 08:57:50AM -0400, Fabian Deutsch wrote: > > > ----- Original Message ----- > > > > On Wed, Jul 08, 2015 at 09:11:42AM +0300, Michael S. Tsirkin wrote: > > > > > On Tue, Jul 07, 2015 at 05:13:28PM +0100, Dan Kenigsberg wrote: > > > > > > On Tue, Jul 07, 2015 at 10:14:54AM +0200, NUNIN Roberto wrote: > > > > > > > > > > > > > > > > On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN Roberto wrote: > > > > > > > > > Hi Dan > > > > > > > > > > > > > > > > > > Sorry for question: what do you mean for interface vnetxxxx ? > > > > > > > > > Currently our path is : > > > > > > > > > eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN) ------ bridge > > > > > > > > > ----- > > > > > > > > > vm. > > > > > > > > > > > > > > > > > > Which one of these ? > > > > > > > > > Moreover, reading Fabian statements about bonding limits, > > today I > > > > > > > > > can try > > > > > > > > to switch to a config without bonding. > > > > > > > > > > > > > > > > "vm" is a complicated term. > > > > > > > > > > > > > > > > `brctl show` would not show you a "vm" connected to a bridge. > > When > > > > > > > > you > > > > > > > > WOULD see is a vnet888 tap device. The "other side" of this > > > > > > > > device > > is > > > > > > > > held by qemu, which implement the VM. > > > > > > > > > > > > > > Ok, understood and found it, vnet2 > > > > > > > > > > > > > > > > > > > > > > > I'm asking if the dhcp offer has reached that tap device. > > > > > > > > > > > > > > No, the DHCP offer packet do not reach the vnet2 interface, I can > > > > > > > see > > > > > > > only DHCP DISCOVER. > > > > > > > > > > > > Ok, so it seems that we have a problem in the host bridging. > > > > > > > > > > > > Is it the latest kernel-3.10.0-229.7.2.el7.x86_64 ? > > > > > > > > > > > > Michael, a DHCP DISCOVER is sent out of a just-booted guest, and > > OFFER > > > > > > returns to the bridge, but is not propagated to the tap device. > > > > > > Can you suggest how to debug this further? > > > > > > > > > > Dump packets including the ethernet headers. > > > > > Likely something interfered with them so the eth address is wrong. > > > > > > > > > > Since bonding does this sometimes, this is the most likely culprit. > > > > > > > > We've ruled this out already - Roberto reproduces the issue without a > > > > bond. > > > > > > To me this looks like either a regression in the host side bridging. But > > > otoh it > > doesn't look > > > like it's happening always, because otherwise I'd expect more noise around > > this issue. > > > > > > - fabian > > > > Hard to say. E.g. forwarding delay would do this for a while. > > If eth address of the packets is okay, poke at the fbd, maybe there's > > something wrong there. Maybe stp is detecting a loop - try checking that. > > Someone is checking this ? > In tested config SPT was off.
Then maybe you have a loop :) > RN > > > > -- > > MST > > _______________________________________________ > > Users mailing list > > Users@ovirt.org > > http://lists.ovirt.org/mailman/listinfo/users > > Questo messaggio e' indirizzato esclusivamente al destinatario indicato e > potrebbe contenere informazioni confidenziali, riservate o proprietarie. > Qualora la presente venisse ricevuta per errore, si prega di segnalarlo > immediatamente al mittente, cancellando l'originale e ogni sua copia e > distruggendo eventuali copie cartacee. Ogni altro uso e' strettamente > proibito e potrebbe essere fonte di violazione di legge. > > This message is for the designated recipient only and may contain privileged, > proprietary, or otherwise private information. If you have received it in > error, please notify the sender immediately, deleting the original and all > copies and destroying any hard copies. Any other use is strictly prohibited > and may be unlawful. _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
