RE: [ssm] Who uses SSM?

Beau Williamson <bwilliam@cisco.com> Thu, 18 November 2004 00:52 UTC

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Date: Wed, 17 Nov 2004 18:45:23 -0600
To: "Sundeep Singatwaria" <ssingatw@nortelnetworks.com>, Marc Barisch <mbarisch@gmx.net>, ssm@ietf.org
From: Beau Williamson <bwilliam@cisco.com>
Subject: RE: [ssm] Who uses SSM?
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At 11/17/2004 01:34 PM, Sundeep Singatwaria wrote:

>Beau - All routers that can support PIM-SM in hardware can also support 
>PIM-SSM. We have customers using SSM mainly in the enterprise space.

Sundeep,

The problem is not the routers, it's the switches and the hosts that don't 
completely support IGMPv3.

Beau


>Sundeep
>
>-----Original Message-----
>From: ssm-bounces@ietf.org 
>[<mailto:ssm-bounces@ietf.org>mailto:ssm-bounces@ietf.org]
>Sent: Wednesday, November 17, 2004 7:21 AM
>To: Marc Barisch; ssm@ietf.org
>Subject: Re: [ssm] Who uses SSM?
>
>At 11/17/2004 07:30 AM, Marc Barisch wrote:
> >Hi
> >
> >I have read about the advantages of PIM-SSM over PIM-SM from a technical
> >point of view.
> >For a seminar paper at my university, I would like to provide some figures
> >concerning the deployment of the different PIM modes, especially regarding
> >TV broadcast over packet networks.
> >
> >Does anybody know of providers using PIM-SSM or are using all PIM-SM?
> >Are there any commercial deployments regarding PIM-SSM and IPv6.
> >
> >Thanks in advance
> >
> >Marc
>
>Marc,
>
>This is a classic case of "The spirit is willing but the flesh (hardware)
>is weak."
>
>The advantages are certainly well known and there is a growing push to
>build networks that support SSM.  Unfortunately, the support for IGMPv3 is
>still not pervasive enough in end-stations and (in some cases) edge routers
>and switches to actually deploy SSM.  This is slowly changing and I expect
>(I hope) that we will soon see greater deployments of SSM for one-to-many
>multicast applications.
>
>Beau Williamson
>
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