On Tue, Jul 23, 2002 at 04:43:29PM -0700, Dennis Ferguson wrote:
> 
> It might be better to put it that NetBSD doesn't support unnumbered interfaces
> but what it does support (non-subnetted configuration of addresses on p2p
> links) is sufficient for most purposes?

actually, it turns out that it is possible to make an unnumbered
interface using gre(4) (the remote address is set using the greconfig(8)
program which uses an ioctl specific to the gre device). an equivalent
configuration using IPPROTO_IPV[46] does not seem to be possible with gif(4).
the obsolete ipip(4) did, on the other hand, support unnumbered links.

-w