All things related to multicast

[David Farmer <>]

Currently we are doing anycast RP and full interdomain MSDP.  I'm thinking about turning off interdomain MSDP, I'd like to completely eliminate MSDP.  Anycast RP is still an open question, but if I can do PIM-bidir I don't need it either.  With PIM-bidir you don't build the source specific (S,G) trees only the *,G tree.

  

On Wed, Aug 10, 2016 at 2:17 PM, Tristan Rhodes <> wrote:

2.  Within your own network, are you currently doing Anycast RP (same IP address on multiple routers) with MDSP?  Is that not a recommended design?

Tristan Rhodes
Network Engineer

Weber State University

801.626.8549

On Wed, Aug 10, 2016 at 1:13 PM, David Farmer <> wrote:

We are at the beginning of a major equipment replacement/upgrade cycle for campus.  As part of that I have been thinking about what the appropriate support of interdomain multicast should be.  While I haven't come to a final conclusions yet, here is my current thinking.

1. Primary goal of deprecating MSDP, and therefore interdomain IPv4 ASM multicast. MSDP is fragile and honestly it's a hack.

2. Keep IPv4 ASM multicast locally, on campus, maybe between campuses in the University system, through use of a common RP, no MSDP.  

3. Keep IPv4 SSM interdomain multicast 

4. Focus efforts on supporting IPv6 interdomain multicast, SSM and embedded-RP

5. Keep IPv4 and IPv6 BGP multicast NLRIs

6. Primarily PIM sparse mode, maybe using PIM-bidir for better scaling

What do others think?

Thanks

On Wed, Aug 10, 2016 at 11:00 AM, Michael H Lambert <> wrote:

The following was sent by John Kristoff (cc'ed) to the Multicast WG mailing list (yes, the list still exists):

> Begin forwarded message:
>
> From: John Kristoff <>
> Subject: AS 20130 has turned off interdomain IP multicast
> Date: 9 August 2016 at 18:09:37 EDT
> To: "" <>
> Reply-To:

>
>> show msdp
> MSDP instance is not running
>
>> show route table ?
> Possible completions:
>  <table>              Name of routing table
>  inet.0
>  inet.1
>  inet6.0
>  inet6.1
>>
>
> It was a fun ride for a time, but it now joins the dustbin of dead
> technologies in the back of my brain.  Token Ring, ISDN, NetWare, ...,
> welcome you to the club, may you rest in peace.
>
> John

Does anyone else think it might be time to reflect on the future of interdomain multicast in the backbone?

Michael

--

===============================================
David Farmer              
Networking & Telecommunication Services
Office of Information Technology
University of Minnesota  
2218 University Ave SE        Phone: 612-626-0815
Minneapolis, MN 55414-3029   Cell: 612-812-9952
===============================================

--

===============================================
David Farmer              
Networking & Telecommunication Services
Office of Information Technology
University of Minnesota  
2218 University Ave SE        Phone: 612-626-0815
Minneapolis, MN 55414-3029   Cell: 612-812-9952
===============================================