[LARTC] Bridging three vlans

[Ed Wildgoose]

Taylor, Grant wrote:

> Ed, can we get more information as to what devices on your network 
> have what IP, your VLAN config, your bridge config, you 
> IPTables(-save) config?
>
> I need some more data to stare at to try to find a problem in this mix.


It's a wrt54G, so the 5 ports on the back are really a hub plus a single 
net interface.  However, the driver has the capability to tag and create 
multiple vlans from any group of ports

So the end result is that if I create three vlans on the same effective 
net interface then routing stops working properly until I turn on STP 
(even if the bridge doesn't use all three vlans).  If I make the bridge 
use all three vlans (each vlan without a real IP or netmask) then 
routing stops working completely even with STP enabled.

Is the limitation because of the multiple vlans on a single real net 
interface?  Of course since the vlans are driver implemented there could 
be other problems arising, so simply stating whether it ought to work or 
not would be good at this stage...

Software is "openwrt" which is a hacked 2.4 kernel for arm, and a number 
of pre-applied patches.  I would have to dig a little to remind myself 
of exactly what patches are applied, but basically stuff like the bridge 
firewalling stuff I think.

I'm testing by plugging real machines into the lan, wan and DMZ vlans 
and seeing if they can see each other...

Any suggestions?

Ed