[150775] in North American Network Operators' Group
NANOG Operational TTL Alert for 160-bit Headers (aka IPv4)
daemon@ATHENA.MIT.EDU (Guru NANOG)
Sat Mar 3 18:03:22 2012
Date: Sat, 3 Mar 2012 17:02:29 -0600
From: Guru NANOG <nanog.guru@gmail.com>
To: nanog <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Common Misconception - IPv4 is Out of Address Space
NANOG Operational TTL Alert for 160-bit Headers (aka IPv4)
The 8-bit TTL field is reduced to 4-bits plus two 11 bits stuck at 1
for a long time
The new 8-bit fields are: SD11TTTT
Packets without the 11 will enter Deep Packet Inspection processing (slow)
SD are new Source and Destination Address bits set via the generic
AAAA 128-bit records
4+8+12+30+6 =3D 60 + 68 =3D 128
VRHL+111.T1.000+Port12+30+Frag6
T1 sets the TTL bits - Use T0 at your own risk - VRHL=3D0101=3D5
NANOG.GURU.=E2=98=BA
