Re: xen2 and VLANs (again)

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Tue, Dec 11, 2007 at 10:47:16PM -0600, Chris Brookes wrote:
> On 11/12/2007, Manuel Bouyer <bouyer%antioche.eu.org@localhost> wrote:
> 
> > Yes, it's the way to go
> 
> Sure enough it works  as planned. I'm very happy with the setup.
> 
> > From a quick look at current, it looks like the MTU is hardwired in
> > the vr(4) driver. But if you have a patch from openbsd, it shouldn't
> > be hard to get it working.
> 
> 
> I appeared to just need
> 
> sc->vr_ec.ec_capabilities = ETHERCAP_VLAN_MTU;
> tmp = ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN;
> tmp += ETHER_VLAN_ENCAP_LEN;
> ifp->if_mtu = tmp;
> 
> And it seems to work well. I hesitate to submit a patch because I have
> very little confidence in what I've done, particularly since I've only
> had it running for 10 minutes

please send a PR with patch when you have tested it a bit more. Especially,
test (with e.g. ping -s) that you can send 1500-bytes packets.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--