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Re: vlan(4), native vlan/vlan1, OpenBSD v.s. NetBSD behavior



On Thu, Dec 15, 2005 at 12:45:55AM +0300, Mike Belopuhov wrote:
> On Wed, Dec 14, 2005 at 16:02 -0500, Brian A. Seklecki wrote:
> > $ sudo tcpdump -n -i xl0
> > 15:01:05.562906 arp who-has 10.0.0.1 tell 10.0.0.3
> > 15:01:07.562869 arp who-has 10.0.0.1 tell 10.0.0.3
> > 15:01:08.293927 arp who-has 10.0.0.2 tell 10.0.0.3
> > 15:01:08.293905 10.0.0.2 > 10.0.0.3: icmp: echo request
> > 
> > -bash-3.00$ ifconfig xl0
> > xl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
> >         address: 00:50:da:28:37:7f
> >         inet 10.0.0.3 netmask 0xfffffff8 broadcast 10.0.0.7
> > 
> 
> AFAIR, some (or most/all?) xl NICs do not support ethernet frames of
> length more than MTU. So 802.1q packets just couldn't be processed.
> 
> And Intel ones (which are supported by the fxp(4) driver) do support
> such long frames.
> 
> Sorry, if I mistaken.

You're mistaken. xl(4)'s with OpenBSD can support VLAN sized frames.