For what it's worth,
Whenever statelessly auto-configuring an IPv6 address on Ethernet the
10th and 11th bytes are always 'fffe', hardcoded. These are lost bits.
Alex
Dunn, Jeffrey H. wrote:
TJ,
I am not sure what point you are trying to make. I never said any bits
were "lost," just that longer prefixes make logical address
partitioning easier and more flexible. Am I wrong?
Best Regards,
Jeffrey Dunn
Info Systems Eng., Lead
MITRE Corporation.
(301) 448-6965 (mobile)
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
TJ
Sent: Wednesday, October 01, 2008 10:01 AM
To: ipv6@ietf.org
Subject: RE: what problem is solved by proscribing non-64 bit prefixes?
-----Original Message----- (SNIPPED FOR BREVITY))
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of
Subject: RE: what problem is solved by proscribing non-64 bit
prefixes?
If one uses a partitioning scheme like that in RFC 3531 AND require
that
partitions (sets of prefixes) be on nibble boundaries, a /32
allocation
with
a 64-bit prefix length contains only 8 partitions of 4 bits each.
This
yields just 16 possible subnets per partition. If one allows a 96-bit
Actually, a /64 always falls on a nibble boundary.
As does a /56.
Regardless of left-most, center-most or right-most allocation
methodology,
future scalability concerns, etc.
No bits lost, yes?
/TJ
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