On Wed, Jun 27, 2012 at 1:53 PM, Stig Venaas <s...@venaas.com> wrote:
> On 6/27/2012 10:13 AM, Kerry Lynn wrote: > >> Greetings, >> >> RFC 3484 section 3.1 defines "subnet-local (0x03)" multicast scope, but >> later RFC 4291 section 2.7 defines this multicast scope value as reserved. >> Can I ask if the later interpretation is the correct one? >> >> I ask in the context of e.g. >> http://tools.ietf.org/html/**draft-lynn-homenet-site-mdns<http://tools.ietf.org/html/draft-lynn-homenet-site-mdns> >> where we need a scope greater than link-local in order to span a 6LoWPAN >> subnet, but less than site-local in order to reserve the property "Each >> interface >> belongs to exactly one zone of each possible scope." for future site-local >> protocols that might include the 6LoWPAN router port. >> >> Should I select admin-local scope, or is subnet-local scope available >> for use? >> > > I've always been a bit curious why it got marked as reserved. It was > (unassigned) in RFC 2373, but reserved in RFC 3513. I don't remember > any discussion on this. > > It seems 4 admin-local would be appropriate then. Unless perhaps if 3 > is somehow reserved to allow for maybe future use like this... > > Perhaps it was originally discussed as an analog to IPv4 subnet broadcast, but that usage was later thought unnecessary. Hopefully an IPv6 historian will chime in... Thanks, -K- Stig > > >> Thanks, -K- >> >> >> ------------------------------**------------------------------**-------- >> IETF IPv6 working group mailing list >> ipv6@ietf.org >> Administrative Requests: >> https://www.ietf.org/mailman/**listinfo/ipv6<https://www.ietf.org/mailman/listinfo/ipv6> >> ------------------------------**------------------------------**-------- >> >> > > ------------------------------**------------------------------**-------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: > https://www.ietf.org/mailman/**listinfo/ipv6<https://www.ietf.org/mailman/listinfo/ipv6> > ------------------------------**------------------------------**-------- >
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