Re: [E1000-devel] BUG? strange behavior with vlans and virtual functions on i350

[Wyborny, C. <car...@in...>]

> -----Original Message-----
> From: Chris Friesen [mailto:chr...@ge...]
> Sent: Tuesday, November 13, 2012 3:31 PM
> To: Vick, Matthew
> Cc: e10...@li...; Allan, Bruce W; Ronciak, John;
> Brandeburg, Jesse
> Subject: Re: [E1000-devel] BUG? strange behavior with vlans and virtual
> functions on i350
> 
> What about VLANs when mixing igb/igbvf?  This shouldn't involve ethtool
> options.  It appears that the design intent is that the hardware strips off the
> VLAN tag but passes the information through so that it can be passed up the
> stack on the receiver, but this doesn't seem to be working.
> 
> With the older kernel but the latest igb/igbvf drivers we're having issues as
> follows:
> 
> We can send vlan-tagged packets from a different system and they are received
> in the VMs just fine.  However, if we try to send vlan-tagged packets from one
> VF to the other it appears that the hardware is stripping the VLAN tag
> information and not passing it through to the other VF.
> 
> As per my previous emails I can edit the driver to force vlan stripping to be
> disabled and it seems to let it work in certain circumstances (and I could
> probably get it working reliably with a bit of debugging), but I shouldn't need to
> edit the driver to make it work.
> 
> I'd appreciate it if you could try the following scenario: host using PF, two VMs
> each using a different VF from that PF.  Everyone is using the same VLAN with
> hardware stripping enabled.  Then test connectivity between the two VMs,
> between host and VM, and from the outside world (on the same VLAN) to both
> host and a VM.
> 
> Thanks,
> Chris
> 
Hello Chris,  

We are a bit resource constrained on this particular topic.  I will need to do some research and work on a repro in order to have some advice for you.

Thanks for your patience,

Carolyn