David Conrad wrote:
Why is the IETF trying to micromanage ISP business models?
Is there a valid technical reason to allow for longer than /64 prefixes?
Almost the right question:
s/allow for/not allow for/
I.e. In the absence of a (valid technical) reason *not* to allow this,
it should be permitted for discussion/proposal/modification of the RFC(s).
Any tie (where tie means opinion differs mildly, no strong opposition by
the vast majority, and no technical obstacle), goes to permissive
modifications.
Brian
Regards,
-drc
On Sep 21, 2007, at 10:39 AM, Christian Huitema wrote:
This whole thread is based on an illusion.
The desire is to help small network operators subdivide the prefix
announced by their ISP.
In principle, if the ISP follows the current guidelines, there is no
issue: even the smallest network receives a /48, and deals with it.
In practice, some ISP are reluctant to follow these guidelines. They
profess concern about address space exhaustion, but we cannot ignore
the obvious marketing implications. If there is a two-tier
allocation, say /48 for enterprises and /64 for residential, then ISP
can use that in a two-tier tariff.
And here comes the illusion. If we observe that ISP only give a /64
to residential customers, then it is tempting to develop technology
so that /64 can be subdivided in multiple subnets, so that each link
gets some /(64+N) prefix. But has anyone stopped to ponder what will
happen next?
If ISP observe that a /64 prefix can be subdivided, and that a single
link can be addressed with /(64+N), what do you believe will happen?
How long will it take before we observe a different 3-tier tariff, in
which enterprises get /48, small businesses get /64, and residential
users get /(64+N)? And what will we do then? Develop technology so
that a /(64+N) prefix can be divided in /(64+N+P) subnet prefixes?
-- Christian Huitema
--------------------------------------------------------------------
IETF IPv6 working group mailing list
ipv6@ietf.org
Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6
--------------------------------------------------------------------
--------------------------------------------------------------------
IETF IPv6 working group mailing list
ipv6@ietf.org
Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6
--------------------------------------------------------------------