All things related to multicast

[Joel Jaeggli <>]

toerless 
()
 has an app the continously measures the
bandwidth of a given stream... not sure if it's available for public
consumption or not though.

joelja

On Tue, 16 Apr 2002, Kevin C. Almeroth wrote:

> >>Date: Tue, 16 Apr 2002 15:39:34 -0500
> >>From: Tim Ward 
> >><>
> >>To: 
> >>
> >>Subject: Monitoring multicast groups
> >>
> >>We're into our second day of distribution of 4 off air TV channels to the 
> >>students in four dorms over our campus multicast-enabled network.  We've
> >>seen far more client problems than network problems.  About the biggest
> >>complaint we get is the quality of the picture, which we're working on 
> >>cleaning up before it gets to the encoder.
> >>
> >>One of the issues we're struggling with now is how to monitor that the
> >>system is really working.  One thing I could do is put a beefy machine 
> >>in the NOC to view all four channels at once (software decoding!), but
> >>I'm not sure I want the NOC to be watching TV all of the time!  And if
> >>we go with a 20 channel line up in the fall, I'll need a lot more 
> >>machines!
> >>
> >>Anyone have any suggestions?  I was thinking a small applet running
> >>on a host that could join the group and successfully tell that there
> >>was traffic on it, but that doesn't actually tell me the content.  Ideally
> >>it would SNMP trap if the traffic went to zero.  How do real CATV 
> >>operators do 
> >>this?  A bank of monitors?  Or do they rely on the distributed diagnostic 
> >>tool known as "the user"?
> >>
> >>Tim
> >>-- 
> >>Tim Ward                                  
> >>
> >>      V 847-467-1449
> >>Associate Director                     G172 Leverone Hall  F 847-467-5690
> >>Telecommunications and Network Services            Information Technology
> >>2001 Sheridan Rd  Evanston IL 60208-2030          Northwestern University
> >>
> >>
> >>
> 

-- 
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Joel Jaeggli          Academic User Services   

    
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