Re: [SSM] Some comments on a New Internet draft.

["Seok Joo Koh" <sjkoh@pec.etri.re.kr>]

A very nice input for SSM deployment !

This material is interesting to me in that some inter-domain issues of SSM
deployment
are considered by way of interactions between SSM-capable and SSM
non-capable networks.

Some features in this work are considered reciprocally with 'Autotunneling'
works (by Ross Finlayson).
In particular, the tunneling between Master (end receiver) and Slave
(SSM-router) by Finlayson
may be used in a similar way for the tunneling between SSM source and Border
Gateway Router by Kim.

Anyway, both are purposed to enhance the SSM deployment, and hopefully can
be incorporated.

Cheers,

Seok Joo Koh,

----- Original Message -----
From: "Sang-Ha Kim" <shkim@cclab.cnu.ac.kr>
To: <ssm-interest@external.cisco.com>; <maddogs@ietf.org>
Sent: Monday, February 26, 2001 10:45 AM
Subject: [SSM] Some comments on a New Internet draft.


> Sang-Ha Kim wrote:
>
>    This is the second request for some comments of a new Internet draft
>    T
>        Hierarchical Scheme for Source-Specific Multicast Deployment
>
>            <draft-kim-ssm-hierarchical-scheme-00.txt>
>
>    Abstract:
>      Source-Specific Multicast (SSM) has been proposed to overcome the
>      deployment limitations of PIM-SM such as handling of well-known
>      sources, access control, and address allocation. However, current
>      SSM work seems to neglect some other deployment issues such as the
>      construction of the shortest path tree especially in inter-domain.
>      The routing table entries for constructing SSM tree proportionally
>      increase depending on the number of sources and groups. That is,
>      SSM will bring scalability issues like current Internet standard
>      multicasts when it is applied to inter-domain or core networks. In
>      order to allow SSM to be deployed on Internet core networks,
>      hierarchical consideration should be additionally augmented into
>      the SSM scheme. This document specifies a hierarchical scheme,
>      which uses not only existing SSM scheme within intra-domain, but
>      also an automatic tunneling between a source and a border gateway
>      router in inter-domain.
>
> You can get a copy online at
>
<http://search.ietf.org/internet-drafts/draft-kim-ssm-hierarchical-scheme-00
.txt>.
>
>      Sang-Ha.