>>We should just flush ipip in favor of gif.
>i disagree.  ipip should be deprecated ip protocol 4 (ip in ip, as
>manufactured by the ipip interface) should be turned into another mode
>of operation for the gre interface.
>i think the profusion of tunneling interfaces is kinda silly...unless
>there's some subtle differences to them that i don't understand.

	You are mixing up sometihng.  gre has nothing to do with the issue
	I've raised.

	gif: IP proto #4 and #41, IPv[46] in IPv[46]
	ipip: IP proto #4, IPv4 in IPv4
		IPv4 in IPv4 almost identical to gif
	gre: IP proto #47, RFC1702 (VERY DIFFERENT)

itojun