Excerpts from netbsd: 24-Mar-98 NetBSD master CVS tree commits The S. of
A. Evil@netbsd (240)

> Modified Files:
> 	if_atmsubr.c 
> Log Message:
> Add a missing ntohs. With this change I got ip over atm (vpi/vci) working
> between 2 PCs.

This looks wrong - or at least it is not as it was planned to work.
The ATM_LLC_TYPE() macro does already the byte swap.
(look at the changes for r1.8 and r1.9)
Perhaps there is something wrong at the sender's side?
(Can't test it now, but IP via encapsulation used to work for
me prevoiusly, even to different boxes (Sun/FORE and DEC)).

best regards
Matthias