>	However: since gif and IPsec tunnel implement different encapsulation
>	from each other, use of gif can cause interoperability problem,
>	especially if the other end is non-NetBSD box.  It is documented in
>	gif(4) manpage, at the bottom.

	To add some more: the encapsulation are NOT bit-by-bit compatible.
	They are spec'ed to do different things.  So if the other end is picky
	about the difference between two configurations, the other end can
	drop packets on the floor if you configure it with gif.

itojun