All things related to multicast

[Leonard Giuliano <>]

On Mon, 10 Jul 2017, David Farmer wrote:

| 
| 
| On Mon, Jul 10, 2017 at 4:25 PM, Leonard Giuliano 
<>
 wrote:
| 
|       FWIW, deprecating interdomain IPv4 ASM is something that has been
|       suggested at IETF in the MBONED WG for quite some time and there has 
been
|       recent activity on a draft to codify this proposal.
| 
| 
| Any pointers?

https://tools.ietf.org/html/draft-acg-mboned-multicast-models-00

Currently, the focus of the draft is to explain the different service 
models (ASM, SSM).  But the plan is to whittle it down and to at least 
make a strong recommendation to use SSM for interdomain, if not 
deprecating interdomain ASM altogether.

If there are folks intererested in this effort and have comments and 
thoughts, please share with the authors.

One concern I would have is for the folks who do use mcast today (and I 
know it's not a huge number, but I'm sure it's non-zero nonetheless), are 
the apps they use SSM aware?  Would deprecating ASM break the few folks 
who do use mcast today?

|  
|       And, personally, I would go even further and suggest why not do the 
same
|       with v6? 
| 
| 
| I'd be fine with that personally.
|  
|       While Embedded RP avoids many of the horrors of MSDP, if SSM is
|       sufficient for v4 it should also suffice for v6.  Network-based source
|       discovery accounts for the vast majority of complexity in mcast
|       deployments- both for v4 and v6.
| 
| 
| I left in Embedded RP because the support by the inter-domain backbone is 
more or less identical to SSM, but I'd be happy without it too.

Might as well go all in and rid the world of PIM registers, data-driven 
state creation, tree-switchover, etc.