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Re: [ssm] Dual homed multicast src and SSM

Beau Williamson <bwilliam@cisco.com> Wed, 13 October 2004 18:33 UTC

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Date: Wed, 13 Oct 2004 13:20:54 -0500
To: "Field, Brian" <Brian_Field@cable.comcast.com>, ssm@ietf.org
From: Beau Williamson <bwilliam@cisco.com>
Subject: Re: [ssm] Dual homed multicast src and SSM
In-Reply-To: <6FEB46B4943AA348B0776325DA8EC37F02060EC0@entcoexch01.broad band.att.com>
References: <6FEB46B4943AA348B0776325DA8EC37F02060EC0@entcoexch01.broadband.att.com>
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Brian,

There is nothing specific to SSM that would prevent the trees from being 
setup between one AS and another.  The fact that the source domain is 
dual-homed only means that there are two paths form where Joins can arrive 
(from other domains).  This is of course controlled with normal BGP metrics 
and is no different from hosts in other AS's wishing to "send" unicast 
traffic to the source host.

Beau
At 10/12/2004 06:19 PM, Field, Brian wrote:

>Consider a network operating in SSM and a dual homed multicast src
>device.  Is there a standard way to setup the forwarding between the
>routers and the src device to get the SSM trees built properly?  Seems
>as if the device needs to eiter participate in routing and announce the
>src IP or run something like HSRP.  Issues with these approaches?
>Other options?
>
>Thanks
>Brian
>
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