All things related to multicast

[Debbie Fligor <>]

On Feb 10, 2012, at 13:25, Bill Owens wrote:

> On Fri, Feb 10, 2012 at 02:12:27PM -0500, Matthew J Zekauskas wrote:
>> Phil Dykstra asked me about multicast beacons, and I thought I'd forward 
>> the question here.
>> 
>> In particular, are networks still running them (I don't think there is 
>> one on the Internet2 Network currently), and if so what do they use, 
>> since existing code bases are not supported (AFAIK).
> 
> I expect you're talking about IPv4, but for v6 there are still a few of us 
> die-hards running dbeacon. Debian and Ubuntu have it as a package, which 
> they list as version 0.3.9.3. There's a GitHub repository as well 
> (https://github.com/hugosantos/dbeacon) which seems to be 0.3.9.2 and 
> hasn't been touched in at least two years. 
> 
> You can use dbeacon for v4, for example:
> http://ag0-video.vislab.uq.edu.au:8888/matrix/
> 
> I'm not aware of anyone using it in the US though. . .


For IPv4 I run an ASM dbeacon matrix for our campus, and started one on 
233.0.38.38 that people are welcome to use for Internet-wide connectivity. I 
thought I'd posted about it a few months back, and there was some discussion 
of picking a better group address, but I didn't see a strong consensus to 
change it nor did anyone else offer to register one.

As with all dbeacon instances, there's no way to tell what should be there, 
so it's always hard to tell when it's working.  we just got some bug-fix code 
that should up the stability of our multicast in the backbone yet again 
(hopefully this time it stays stable). we've only gotten it deployed on one 
router yet though.  we're the only one in the list, but I can't tell if 
that's because no one else is playing, or because multicast is broken again. 

http://bbmon2-1.gw.uiuc.edu/matrix-global/

Current stats for 233.0.38.38/10000


> 
> Bill.

-----
-debbie
Debbie Fligor, n9dn       Network Engineer, CITES, Univ. of Il
email: 

          <http://www.uiuc.edu/ph/www/fligor>
"Every keystroke can be monitored. And the computers never forget."