[AG-TECH] Testing multicast connectivity...

Bill Nickless nickless at mcs.anl.gov
Tue May 20 21:24:55 CDT 2003


Ah, this is a different problem.  I thought you were talking about the 
beacon traffic not being heard by other beacons.  Now I understand you're 
talking about your beacon crashing from time to time (or one of the three 
threads).

Mitch Kutzko <mitch at ncsa.uiuc.edu> has a slightly modified version of the 
beacon code, with larger pre-compiled constant buffers.  I'm not sure if 
Mitch thinks it's ready for prime time yet.  I've copied him on this 
note--Mitch, is it ready for distribution?

At 05:12 PM 5/20/2003 -0600, Richard Coffey wrote:
>Hi Bill,
>
>Avtwo.cs.utah.edu is the beacon is question. Every once and a while, Java
>throws and exception and kills the connection. Thoughts on that?
>
>-Richard
>
>On 5/20/03 4:15 PM, "Bill Nickless" <nickless at mcs.anl.gov> wrote:
>
> > This is consistent with an old bug in Cisco IOS prior to 12.0(10).  If the
> > router directly connected to the source is running an earlier version, then
> > the behavior you mention below is possible.
> >
> > What specific beacon sources are you referring to?
> >
> > At 03:57 PM 5/20/2003 -0600, Richard Coffey wrote:
> >> Hi all,
> >>
> >> As of late, I've noticed problems with individual multicast addresses
> >> working. The beaconserver's address seems to indicate that we cannot send,
> >> yet I've gone into the test room and successfully collaborated. Also, 
> people
> >> cannot see me in a particular room, but in other rooms they can, and vice
> >> versa.
> >>
> >> We're not running tight ACL's on our routers, so it's not that. Thoughts?
> >>
> >> -Richard
> >>
> >> --
> >> Richard C., SCI Evangelist
> >> SCI Institute
> >> University of Utah
> >> http://www.sci.utah.edu/
> >> 801.918.5050
> >> 801.585.6513 fax
> >
> > ===
> > Bill Nickless    http://www.mcs.anl.gov/people/nickless      +1 630 252 
> 7390
> > PGP:0E 0F 16 80 C5 B1 69 52 E1 44 1A A5 0E 1B 74 
> F7     nickless at mcs.anl.gov
> >
> >

===
Bill Nickless    http://www.mcs.anl.gov/people/nickless      +1 630 252 7390
PGP:0E 0F 16 80 C5 B1 69 52 E1 44 1A A5 0E 1B 74 F7     nickless at mcs.anl.gov




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