Someone get this man a Xanax! -----Original message----- From: Guru NANOG <nanog.guru@gmail.com> To: nanog <nanog@nanog.org> Sent: 2012 Mar, Sun, 4 00:01:04 GMT+00:00 Subject: NANOG Operational TTL Alert for 160-bit Headers (aka IPv4) 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 = 60 + 68 = 128 VRHL+111.T1.000+Port12+30+Frag6 T1 sets the TTL bits - Use T0 at your own risk - VRHL=0101=5 NANOG.GURU.☺