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Re: [MBONED] deprecating MSDP

Leonard Giuliano <lenny@juniper.net> Wed, 02 August 2017 14:20 UTC

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Date: Wed, 02 Aug 2017 07:20:13 -0700
From: Leonard Giuliano <lenny@juniper.net>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mboned/ZHGKX4guF1rrwGGEh1_ZZQeRXs0>
Subject: Re: [MBONED] deprecating MSDP
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On Wed, 2 Aug 2017, Tim Chown wrote:

| There are other issues that have arisen from discussion started by Rob 
| on our Janet multicast list, e.g. whether the ISP would then filter any 
| GLOP or IPv4 Unicast-based prefixes, as we should all be using 
| 232.0.0.0/8.

In theory, it's possible for SSM (or at least SSM-like) behavior to happen 
outside of 232/8.  For example, SSM mapping, which happens at the LHR and 
basically results in SSM behavior from that point forward, so that should 
be OK in an SSM-only interdomain world.  Another theoretical possibility 
is that IGMPv3/MLDv2 source-included reports/subscribes can happen on ASM 
addresses.  So I don't think filtering ASM space is necessary just yet, 
but we prep it for the chopping block...

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