[Click] Stupid question/problem on SendTo

[Nicholas Weaver]

I've got a stupid configuration thats adding VLAN tags to a packet  
from a dummy interface and then sends it out:

(userlevel, linux)

A stripped down representation of the path in question:

FromHost(dummy, 10.3.128.2/16) -> TagVLAN(164) -> Queue ->  
ToDevice(eth1);

Of course, now I have a problem with MTU packets on FromHost:

1496 byte (total size) ICMP packets work no problem...

1500 byte (MTU) ICMP packets don't get sent, with a:
ToDevice(eth1) send: Message too long

error.

How do I convince ToDevice to send a full frame ethernet packet with a  
VLAN tag?

Thanks.