>> 	i'd vote against this, due to scoped IPv6 architecture...
>Sorry, I can't understand what you want to point out.  The argument of '-i'
>option is the name of interface from which an application capture data.
>It is almost independent from any scope of addresses.

	i read your statement as:
	- create another ifnet called "wi0/802.11", which uses the same
	  hardware as "wi0", and has different BPF behavior.
	and i didn't like it as we would have separate link-local scope for
	"wi0" and "wi0/802.11".

	did you mean "pseudo interface *name* used within tcpdump(8)"?

itojun