Multicasting in the InternetMulticasting in the Internet

In the beginning there was the Internet…

…and the Internet was multicast-less

Growing trees in the Internet

Why not to write all the destination into one packet?

Jarle Søberg

Piotr KamisinskiMorten Lindenberg

Vera Goebel

Thomas Plagemann

Ovidiu Valentin Drugan

Matija PuzarStein Kristiansen

Kennedy Samuel Kamwendo

Daniel Rodríguez Fernández

Ellen Munthe-Kaas

Kjell Åge Bringsrud

Hoang Viet Nguyen

Piotr Srebrny

Sebastian

Hi…

Maybe, let’s create groups in the Internet…

DMMS GroupHi,I would like to inviteyou to the presentationon the IP Multicast issues.

……and the resulting types of trees and the resulting types of trees differ very…differ very…

We want the multicast that We want the multicast that achieves enormous scalability!!achieves enormous scalability!!

Scalability was like the Holy Grail for multicast community.

The first multicast service model: The first multicast service model: Any Source Multicast Any Source Multicast (ASM)(ASM)

DMMS Group

The first multicast service model: The first multicast service model: Any Source Multicast Any Source Multicast (ASM)(ASM)

DMMS Group

Limited number of channels which were not allocated…

… … it lacked congestion control it lacked congestion control mechanisms…mechanisms…

……it was open…it was open…

… and it needed full deployment to work.

So, IP Multicast evolved…So, IP Multicast evolved…

… and after 10 years of non-random mutations

Single Source Multicast

But still aiming at the enormous But still aiming at the enormous scalability.scalability.

What is IP Multicast?

DVMRPPIM-DM

PIM-SM

MOSPF

MSDP

MLDv2

IGPMv2

IGPMv3

MBGP

BGP4+

MLDv3

AMT

PIM-SSM

PGM

MAAS

MADCAP

MASCIGMP Snooping

CGMPRGMP

Inherited problems of Inherited problems of the multicast architecturethe multicast architecture

Did IP Multicast fail?Did IP Multicast fail?