vlans and cloning

Andrew Thompson thompsa at freebsd.org
Mon Jul 10 20:27:15 UTC 2006


On Mon, Jul 10, 2006 at 09:04:41AM -0700, Brooks Davis wrote:
> On Mon, Jul 10, 2006 at 10:52:33AM +0200, Andre Oppermann wrote:
> > Sam Leffler wrote:
> > >I committed the revised netif cloning api so you can now specify
> > >parameters when cloning.  I also modified the vlan code to use this
> > >mechanism so doing something like:
> > >
> > >ifconfig vlan create vlan 1 vlandev em0
> > >
> > 
> > /me wants to do:
> > 
> > "ifconfig em0.1 inet 192.168.2.2/24"
> > 
> > Even simpler.  And yes, this works already but only if if_vlan.ko
> > was loaded before or compiled into the kernel.  It doesn't do auto-
> > load.
> 
> Unless cause ifconfig to autoload all if_ modules when cloning fails,
> it's impossiable to support this without having if_vlan loaded.  That
> said the current plan it to eliminate if_vlan and integrate vlan support
> directly into if_ethersubr.c to allow use to correctly handle the
> default vlan case among otherthings.

Is anyone working on this? The bridge code needs access to the vlan tag
to properly hash the address as each vlan is a seperate broadcast
domain, this would be much easier with vlan merged to if_ethersubr.c.


Andrew


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