All things related to multicast

[Tim Chown <>]

Hi,

For UK academic sites, we have http://www.multicast.org.uk/matrix/,
which looks quite healthy as I type.

One thing I noticed with dbeacon is that it does generate a lot of
traffic, and thus a big matrix might not be prudent.   I've been meaning
to dig a little deeper into that but not had time, perhaps someone
else can comment from experience on dbeacon's scalability?

Tim

On Fri, Sep 28, 2007 at 03:02:15PM -0500, debbie fligor wrote:
> We're back on the global multicast scene with most things working,  
> but as I try and use beacon.dast.nlanr.org to look at how well things  
> are being seen and make sure it's really all working, I'm finding  
> that my host is reporting seeing sources that tcpdump clearly shows  
> are not making it to my network.  So I thought I'd bring this up to  
> revisit ...
> 
> Caren -- did this ever get put together for IPv4?  I looked through  
> the list archives for "dbeacon" and didn't see any announcements that  
> I might have otherwise missed.  You had mentioned later last fall on  
> the beacon group that you thought they had something up now, but I  
> can't find a posting on that list either.
> 
> The GR-NOC tools page only has the NLANR beacon under multicast  
> tools, so I couldn't find a group there.
> 
> I think we all agree this would be handy, the only question is if  
> there is already one we could be using or someone needs to offer up a  
> GLOP address -- since we don't need a central server, we all just  
> start using it.  I can provide one if no one has one in use for this  
> already.
> 
> 
> To go along with this, it occurred to me that it would be handy if  
> there was a web page (wiki?) where we would list what hosts we have  
> trying to talk on that group (and the URL if you have matrix running  
> on the host), as there's no central server to show you who you're not  
> seeing, if you're not seeing them (and no one else you can see is  
> seeing them).  I can trivially put up a traditional web page, but not  
> a wiki.
> 
> 
> 
> On Jun 8, 2006, at 10:43, Caren Litvanyi wrote:
> 
> >On Thu, 8 Jun 2006, Hugo Santos wrote:
> >
> >>Hi,
> >>
> >>  What was the problem? It is used extensively in m6bone.
> >>
> >Unknown, he says he was doing some funky things to diagnose
> >an SSM problem, and the daemon version would die ocasionally.
> >Didn't have any good debug info to give me on the problem.
> >That's all I know.  He restarted it and it is running.
> >I have not had time to help diagnose the SSM problems.
> >I think he hopes to have a v6 one running decently by
> >joint techs, looking into v4, we were going to use some
> >glop out of Abilene space.  I'll see if I can get him to
> >join the list.  ;-)
> >Caren
> >
> >
> >>  Hugo
> >>
> >>On Thu, Jun 08, 2006 at 03:19:03PM +0000, Caren Litvanyi wrote:
> >>>Well, we have been working on dbeacon out of GlobalNOC.
> >>>Our sysadmin guy working on it though is having a little
> >>>trouble with it dying frequently.  So it is not yet ready
> >>>for primetime apparently.
> >>>Shall we continue this effort?
> >>>Caren
> >>
> >
> >
> >------------
> >Caren Litvanyi, network engineer
> >Global Research NOC at Indiana University
> >
> >o:812-856-4576  c:720-839-7739
> >
> 
> -----
> -debbie
> Debbie Fligor, n9dn       Network Engineer, CITES, Univ. of Il
> email: 
> 
>           <http://www.uiuc.edu/ph/www/fligor>
>                    "My turn."  -River
> 
> 
> 

-- 
Tim