vlan with higher MTU (jumbo frame) than underlying Ethernet interface

[Erik Fair <fair%netbsd.org@localhost>]

NetBSD's documentation doesn't say explicitly: can one have a vlan interface 
with a jumbo frame MTU (e.g. 9000), on top of an Ethernet interface which 
supports jumbo frames, but whose MTU (1500) has not be adjusted up?

The goal would be to use jumbo frames between consenting hosts on a switch that 
supports jumbo grams, but segregate the traffic by VID (and IP address) such 
that a jumbo-supporting host won't send jumbograms to a non-supporting host by 
default.

        Erik <fair%netbsd.org@localhost>