No Subject

Automatic tunneling can initiate a process and provide an incentive 
for wide spread multicast deployment at the routers. By enabling an 
immediate multicast to applications, routers that are not multicast 
enabled will suffer a larger load, while the multicast enabled routers 
will require less computational power since they receive a fewer 
number of packets from the next-hop router. This creates a 
positive-feedback that will cause most routers, especially in the 
critical areas, to be SSM-enabled.


Acknowledgement:
================
This document benefited a lot from discussions and specific comments 
of Radia Perlman and Jon Crowcroft. Useful discussion with Suchitra 
Raman are also acknowledged.


References:
===========
[ISM] S. Deering, "Host Extensions for IP Multicasting".
http://www.ietf.org/rfc/rfc1112.txt

[IGMPv3] B. Cain, S. Deering, I. Kouvelas, A. Thyagarajan, "Internet 
Group Management Protocol, Version 3", Work in Progress.
http://www.ietf.org/internet-drafts/draft-ietf-idmr-igmp-v3-04.txt 

[PIM-SM] B. Fenner, M. Handley, H. Holbrook, I. Kouvelas, "Protocol 
Independent Multicast - Sparse Mode (PIM-SM)", Work in Progress.
http://www.ietf.org/internet-drafts/draft-ietf-pim-sm-v2-new-00.txt

[SSM] H. Holbrook, B. Cain, "Source-Specific Multicast for IP", Work 
in Progress.
http://www.ietf.org/internet-drafts/draft-holbrook-ssm-00.txt 

[PIM-SO] N. Bhaskar, I. Kouvelas, "Source-Specific Protocol 
Independent Multicast", Work in Progress.
http://www.ietf.org/internet-drafts/draft-bhaskar-pim-ss-00.txt 

[PIM-SS] S. Bhattacharyya, C. Diot, L. Giuliano, R. Rockell, 
"Deployment of PIM-SO at Sprint", Work in Progress.
http://www.ietf.org/internet-drafts/draft-bhattach-diot-pimso-00.txt 


Author's Address:
=================
Doron Rajwan
BandWiz Inc.
doron@bandwiz.com

Meir Feder
BandWiz Inc.
meir@bandwiz.com