VLAN

FIRST

The switch port 24 needs to be plugged into the outside world. How the switch is configured to be a VLAN? No clue. Must be some documentation somewhere.

Here is an article on VLAN under Linux: Linux Journal

On gourd, we have the outside device called "farm". We'd need to call it "eth?" to make this work

From Aaron:
By the way, it looks like you ran into some trouble setting up a VLAN. 
Did I mention that the number after the dot is the VLAN ID and thus
quite significant?  Oh, and it looks like it really has to be ethX, not
a random name.  Hmph.  That's dum - 802.11q is perfectly valid on
802.11g as well, and that often has different device names.  Let's see
if we can fix that....  No apparently not.  I'll take a trip over to Rm
202 in a few minutes to restore gourd to operation.