Bad DHCP Checksums over VLANs

[Kurt Jaeger]

Hi!

> >> ifconfig igb0 -rxcsum -txcsum -wol -tso4 -vlanmtu -vlanhwtag 
> >> -vlanhwcsum -vlanhwtso
> >>
> >> Try to disable everything that can be disabled, e.g. LRO etc.
> >
> > Disabling vlanhwtag works around the problem.
> >
> > Also note that only DHCP traffic has this problem.  If I assign an 
> > address manually, all traffic flows normally.  Maybe the problem is in 
> > the BPF send path.
> >
> I had a similar issue, where -vlanhwtag also fixed it.
> That was on a I210 (gib) card (in a FreeNAS mini XL).

I've created a PR for this:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231416

-- 
pi at FreeBSD.org         +49 171 3101372              2 years to go !