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Re: AS 20130 has turned off interdomain IP multicast


Chronological Thread 
  • From: Michael H Lambert <>
  • To: wg-multicast <>
  • Subject: Re: AS 20130 has turned off interdomain IP multicast
  • Date: Thu, 11 Aug 2016 12:34:06 -0400
  • Ironport-phdr: 9a23:W8ZopR2koikZK+GrsmDT+DRfVm0co7zxezQtwd8ZseseKfad9pjvdHbS+e9qxAeQG96Eu7QZ0KGP7ujJYi8p39WoiDg6aptCVhsI2409vjcLJ4q7M3D9N+PgdCcgHc5PBxdP9nC/NlVJSo6lPwWB6i760TlHBRq6MBdxOuX+E5XOx5Co2KW35pnPYg5BnyaVYLVuIQ+woBmL8MQanN0xBLw2z07so3BIculSjUMgAVuWlRvm+o/k+Jdm+SlKp9o57MUGXKnnKfdrBYdEBSgrZjhmrPbgsgPOGFOC

> On 11 Aug 2016, at 12:05, Bruce Curtis
> <>
> wrote:
>
> Perhaps the initial “something better” was BGMP.
>
> "But MSDP is a temporary hack to hold the Any Source Multicast backbone
> together long enough for Border Gateway Multicast Protocol (BGMP) to be
> developed, debugged, and deployed. Maybe--some network developers think
> that BGMP is too complex to be implemented."

BGMP was defined in RFC 3913 which was published as informational in
September 2004. It was moved to historic in January 2008. That has to be
some sort of record.

> My MSDP SA Cache has 1484 entries. But those entries are from 151 RPs.
> The Internet2 web site lists 310 members in the Higher Education category.
> (Not all of the RPs are on Internet2 of course, some of them are connected
> to other networks like GEANT etc).

Yesterday I was seeing 1114 entries. Today it's down to 518. The drop came
after a report to Imperial College London. They had sprung an MSDP leak.

Michael

-----
Michael H Lambert, GigaPoP Manager Phone: +1 412 268-4960
Pittsburgh Supercomputing Center/3ROX FAX: +1 412 268-5832
300 S Craig St, Pittsburgh, PA 15213 USA






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