On Sat, Jun 23, 2012 at 01:17:40PM -0400, Acee Lindem wrote:
> Nobody has ever suggested this - why do think it useful?

Oops - context:  Unnumbered operation on broadcast media, and on that
principle reduction of both IPv4 address consumption and configuration
complexity.

-David


> On Jun 23, 2012, at 9:31 AM, David Lamparter wrote:
> > out of a rather funny misunderstanding of RFC 5309, I've ended up with
> > half an implementation of OSPF running in ignorance of the IP subnet
> > mask on a broadcast network.  After cleaning up the misunderstanding and
> > taking a step back, I found draft-ietf-ospf-hybrid-bcast-and-p2mp, which
> > I expected to contain a note about this, but no such thing.
> > 
> > The general idea would be to operate a broadcast medium with a /32
> > subnet mask, possibly unnumbered, and allowing adjacencies with just
> > about anything that sends a Hello (and passes auth).
> > 
> > The link can operate as regular broadcast, hybrid-bcast-p2mp, or P-t-P
> > (the last would amount to RFC 5309 with the detail that the peer address
> > is not known up front.)
> > 
> > (For OSPFv3, this is obviously not interesting since with link-local
> > addresses, there is no notion of similar same-subnet restrictions.)
> > 
> > I haven't found anything on this - is this mode of operation already
> > described somewhere?

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