On Thu, 22 Aug 2013 15:19:41 -0700 Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx> wrote: > On Thu, 22 Aug 2013 23:49:41 +0200 > Marek Kierdelewicz <marek@xxxxxxxxx> wrote: > > > Hi, > > > > >My general idea is to bridge tagged vlan packets from a physical > > >interface (intel) to a virtual interface (virtio in qemu) and not > > >losing the tags, so the qemu guest can use vconfig and friends to get > > >some vlan interfaces. Is this possible and are there any additional > > >steps necessary besides the usual bridge configuration? > > > > I'm using this setup with KVM virtualization (Qemu's successor). It > > didn't work with default nic type for guest (realtek I think) as 802.1q > > tags were not preserved properly in one of the directions. I don't > > remember specifics. Anyway using e1000 driver instead of default fixed > > it. Works like a charm. > > KVM e1000 Vnic doesn't do VLAN offloading at least in my experience. > Virtio works fine. Ok guys, here is one of the major questions in this issue: How did you manage to convince the _host_ interface driver (in my setup "igb" from intel) to get the vlan tagged packets from the LAN port. igb has a vlan filter function built in and reads _no_ tagged packets at all if the driver does not tell it to. And in case of "up-ing" the interface for attachment to a bridge it does not configure this vlan filter. How is this expected to work? -- Regards, Stephan
