[nsp] multicast flows and dev/null

Hank Nussbacher hank at mail.iucc.ac.il
Thu Feb 5 13:58:14 EST 2004


At 11:38 AM 04-02-04 -0500, Jared Mauch wrote:
>On Wed, Feb 04, 2004 at 05:26:38PM +0100, Francisco Gracia wrote:
> > Hi,
> >
> > I am afraid I am seeing the same issue you saw in your network and cause of
> > your posted message of Mon Aug 4 19:27:44 EDT 2003:
> >
>
>         the address you show is the 'sdr' (aka sap) multicast group.
>
>         this is a dense-mode multicast group that is flooded across the
>entire network in order to broadcast announcements about active multicast
>sessions.

I know all that.  I just don't understand why it is nullrouting some of the 
flows to that address:
AT1/1/0.34    207.75.164.245  Null          224.2.127.254   11 0405 2693   277
AT1/1/0.34    129.132.39.155  Null          224.2.127.254   11 0405 2693   101
AT1/1/0.34    193.190.113.20  Null          224.2.127.254   11 8006 2693  2374
-Hank


>         You can use the "sdr" or other tools to view the contents of
>these announcements.  (there is MacTV for OS/X, the Berkeley MASH
>toolkit, as well as the older ucl applications).
>
>         - Jared
>
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