Tall Stacks

1
Tall Stacks

• Henning Schulzrinne
• Columbia University

2
ACM Sigcomm Applications, Technologies,
Architectures and Protocols

• 1980s

• 1990s were losing

Political
Application
Startup
Presentation
Web
Session
TCP
Transport
Network
IP
Link
Optical
Physical
3
Grand Challenge Taller Stacks

• If we continue, well run start-ups directly on
  optical
• No protocols no measurements, composable OS
  kernels, protocol verification, no conferences
• Thus, we need taller stacks
• Also defeats NATs, firewalls, British customs
  officers, Moores law,

4
Tall Stacks Contest (aka Multiple Protocol Layer
Stacking)

• Cannot use the same protocol twice (except IP)
• Bonus points for use of MPLS
• Evaluation ? payload / packet length
• Smallest number wins
• Hints base64! OTP coding! RFC 2733!

5
The margins are too small to contain the whole
solution.
MPLS
IP-in-SMTP
SMTP
TCP
SONET
IETF Pittsburgh
IP
RTP
Ethernet
L2TP
SCTP
IPv4
IP
PPP
V.21-in-RTP
(1 bit per packet!)
RTP
UDP
IPv6
IPv4
AAL5
ATM
SONET