All things related to multicast

[Robert Olson <>]

We've (ANL & NCSA) been talking to the Abilene folks about this (we're 
seeing problems ANL/NCSA -> PSC). Apparently there's a problem at NYCMng 
not sending joins upstream.

--bob

At 10:38 AM 1/16/2003 -0800, Kevin C. Almeroth wrote:

> Subject: Multicast problems at the NYSC Router?
> From: David Mitchell 
> <>
> To: 
>
>
> Greetings,
>
> I'm not sure this is the best place for this, but I thought I
> would throw it out here. One of our users is reporting problems with
> multicast traffic from dartmouth.edu -> ucar.edu. I took a look at the
> Access Grid Beacon, and quite a few sites seem to have similar patterns
> of loss sending to some sites (agaudio.bu.edu, krypton.dartmouth.edu,
> tesla.psc.edu, noc1.wpi.edu and others). The common link showing up in
> traceroutes to all of them is the nycmng Abilene node. Does anyone know
> of any problems that might be going on there? And what's the best way to
> make NOC folks aware of things like this? I don't know that I should
> open a ticket directly since the problem doesn't appear to be with our
> circuit or local router. It's just something I noticed and thought
> should be looked into. Thanks in advance for any advice,
>
> -David Mitchell
>
> --
> -----------------------------------------------------------------
> | David Mitchell 
> ()
>        Network Engineer IV  |
> | Tel: (303) 497-1845                      National Center for  |
> | FAX: (303) 497-1818                      Atmospheric Research |
> -----------------------------------------------------------------