All things related to multicast

[Marshall Eubanks <>]

Joel Jaeggli wrote:

> looks good from here... nice ukulele
>
> joelja
>
> On Tue, 17 Jul 2001, Alan Crosswell wrote:
>
> > I've started up the multicast for tomorrow's events which, just to
> > recap for the other readers of this email are scheduled for two 50-minute
> > sets at 12 noon and 1 pm EDT on Wednesday 7/18/01.  There is test audio
> > and video now being transmitted.  The multicast session name is
> > "Columbia/MSM/Umich" and will contain a mix of the local jazz trio content
> > and remote interaction from the Umich ITzone in Ann Arbor.  The ITzone
> > will be interacting via the usual Litton MPEG2 stuff.
> >
> > http://www.columbia.edu/acis/networks/advanced/itzone/
> >
> > Feedback from remote viewers (and rtp files for comparison purposes) would
> > be appreciated!
> >
> > Alan Crosswell
> > Director, Network and Computing Systems
> > Columbia University Academic Information Systems
> > 
> > 212-854-3754
> >
>
> --
> --------------------------------------------------------------------------
> Joel Jaeggli                                   
> 
> Academic User Services                       
> 
>      PGP Key Fingerprint: 1DE9 8FCA 51FB 4195 B42A 9C32 A30D 121E
> --------------------------------------------------------------------------
> It is clear that the arm of criticism cannot replace the criticism of
> arms.  Karl Marx -- Introduction to the critique of Hegel's Philosophy of
> the right, 1843.

Looks good from here :

multicasttech-2>mtrace
Source address or name: 128.59.31.169
Destination address or name: 63.105.122.1
Group address or name: 224.2.153.71
Multicast request TTL [64]:
Response address for mtrace:
Type escape sequence to abort.
Mtrace from 128.59.31.169 to 63.105.122.1 via group 224.2.153.71
>From source (iptvhost.cc.columbia.edu) to destination 
>(dmz-mct2.multicasttech.com)
Querying full reverse path...
 0  dmz-mct2.multicasttech.com (63.105.122.1)
-1  dmz-mct2.multicasttech.com (63.105.122.1) PIM/MBGP Reached RP/Core 
[128.59.0.0/16]
-2  204.147.129.89 PIM  [128.59.0.0/16]
-3  jn1-so7-0-0-1.wor.vbns.net (204.147.136.137) [AS 145] PIM  [128.59.0.0/16]
-4  columbia-vbns1.nysernet.net (199.109.4.5) PIM Reached RP/Core 
[128.59.31.0/24]
-5  128.59.1.51 [AS 14] PIM  [128.59.31.0/24]

Starting about Thu Jul 19 15:23:07 EDT 2001 the packet
loss has grown to about 30 %, which does had things to the video. There is no 
obvious reason here
why the packet loss suddenly grew so.

Now at Thu Jul 19 15:25:59 EDT 2001 it seems fine again.

                                 Regards
                                 Marshall Eubanks


T.M. Eubanks
Multicast Technologies, Inc
10301 Democracy Lane, Suite 410
Fairfax, Virginia 22030
Phone : 703-293-9624       Fax     : 703-293-9609
e-mail : 

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