[AG-TECH] quick question

Gregory Bell GRBell at lbl.gov
Wed Sep 11 14:01:49 CDT 2002


Thanks for this.  I've been using vic / rat, but I guess I'm wondering if
there are any cheap, relatively portable cameras known to work well with
the software (either on Linux, Windows or FreeBSD).  Don Morton suggested
looking at the openmash Personal AG software, which I'll do as well.

- Greg

Marty Hoag wrote:

> > I have a vision of being able to configure my laptop as a "mobile AG
> > node" for the purposes of multicast testing and debugging. (I'm
> > investigating a Cisco bug which causes multicast packet loss under
> > certain conditions, and the beacon grid doesn't offer quite what I
> > need).
>    What we've done it just download vic and rat on a laptop and
> then fire those up manually to check out a room.  The group and port
> addresses for all the anl defined venues are available at
>    http://venues.accessgrid.org/AG/venues.php
>    Vic is nice to use for intermittent outages because you can
> graphs the various stats (I'm at home without a vic but I think
> you click on Info, RTP Stats, then the label you want - usually
> I use either frames or missing depending on the problem).  You
> can stretch the graph out several minutes (each vertical bar is
> at 30 second intervals).  The graphs make it very easy to see
> common periodic problems and even time them.  I suspect by now
> if you give someone like Bill Nickless the pattern he could tell
> you what the problem is.  ;-)
>    I haven't looked lately but there are precompiled versions
> of vic and rat available for windows if the laptop has that.
>    Marty

Gregory Bell
Network Systems Engineer
Lawrence Berkeley National Laboratory
1 Cyclotron Road, Mail Stop 50E-101
Berkeley, CA  94720
(510) 486-6817
GRBell at lbl.gov

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