Hi Dave,
> So how exactly do the oversized packets get to the macvlan device from
> the VM in this scenerio? That detail seems to be missing from the
> diagrams you provided earlier. The VM and the macvlan boxes are just
> connected with a line.
Inside the VM I'm using netperf talking on an interface which the guest
believes to have a MTU of 1500.
I'm setting up the VM using libvirt - my understanding is that libvirt
creates a macvtap device in private mode, and qemu opens that tap device
and writes data from the emulated network card (I see the same behaviour
with a emulated rtl8139, e1000, and with virtio).
I think I could replicate this with any userspace program - qemu is just
the easiest for me at the moment.
Hopefully that's what you had in mind? Let me know if you wanted
different info.
Regards,
Daniel
[The gory details, in case it matters: The VM has a network adaptor with
the following XML:
<interface type='direct'>
<mac address='52:54:00:e7:a2:ac'/>
<source dev='enx0050b6655ff2' mode='private'/>
<model type='rtl8139'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07'
function='0x0'/>
</interface>
]
>
> Thank you.
