I have found that there is at least one informational
rfc describeing these king of prefixes:
rfc3627: Use of /127 Prefix Length Between Routers Considered Harmful.
If this rfc would be out of spec, then it would be needless (why is it
there?).
Otherwise, I conclude that IPv6 is classfull, having two classes:
namely /64 and /128 (routing, though is classless).
I still think this is ambiguous (rfc:s might not be, but my interpretation
however is).
Med vänliga hälsningar/Best Regards
Mattias W E
Måndagen, den 14 aug 2006 klockan 08:48, skrev Templin, Fred L:
I have come to consider an individual address as a /128 prefix,
which I have come to call a "fully-qualified prefix". I don't
know about other prefix lengths between /64 and /128, however.
Fred
[EMAIL PROTECTED]
-----Original Message-----
From: Mattias Webjörn Eriksson [mailto:[EMAIL PROTECTED]
Sent: Sunday, August 13, 2006 3:35 PM
To: [email protected]
Subject: Prefix longer than /64
This might have been brought up and answered before,
my appologies.
It is possible to assign an address with a prefix longer than /64 to an
interface, for instance 2001:16d8:ff97:4::1:2/112.
But, rfc4291 section 2.5.4 Global Unicast Addresses, states:
"All Global Unicast addresses other than those that start with binary 000
have a 64-bit interface ID field (i.e., n + m = 64), formatted as
described in Section 2.5.1. Global Unicast addresses that start with
binary 000 have no such constraint on the size or structure of the
interface ID field."
...Which means that a prefix longer than /64 is not valid.
rfc3627 suggests that one should use avoid using a prefix longer than /64,
meaning that it is "somewhat not invalid".
It seems to be some deployments with router link subnets with
prefixes longer than /64.
(http://www.huque.com/~shuque/doc/penn-ipv6-plan.html).
Could someone enlighten me here, please?
Best regards
Mattias Webjorn Eriksson
--------------------------------------------------------------------
IETF IPv6 working group mailing list
[email protected]
Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6
--------------------------------------------------------------------
--------------------------------------------------------------------
IETF IPv6 working group mailing list
[email protected]
Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6
--------------------------------------------------------------------
--------------------------------------------------------------------
IETF IPv6 working group mailing list
[email protected]
Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6
--------------------------------------------------------------------
