[tt-tf] Re: TTM Task Force/Multicast

Dear All,

>  4. Post some notes on our work on the (Gert Doering) Multicast
>     proposal.

We have a student here (Franz) working on the Multicast proposal.  He
started about 2 months ago and will stay with us until early next year.
His assignment is to do a first implementation of the Multicast proposal.

So-far, he has written a multicast beacon.  This beacon can send
(time-stamped) multicast packets around.  He also wrote a listener that
listens to the traffic.  Combining the data gives plots of delays and
losses for the combination of sender and known receivers.   We can
do a "light" version of the software, that is, a version where the
sender or receiver doesn't do time-stamping.  This can be run on non-TTM
boxes but only show loss.  This still needs work in the presentation layer,
we hope to have that ready by RIPE53.

The fun part will come next: combine paths with delay/losses and see if
one can pin-point a distribution problem.

I'm planning to have Franz do a talk and demo @ RIPE53.

Henk



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Henk Uijterwaal                           Email: henk.uijterwaal(at)ripe.net
RIPE Network Coordination Centre          http://www.amsterdamned.org/~henk
P.O.Box 10096          Singel 258         Phone: +31.20.5354414
1001 EB Amsterdam      1016 AB Amsterdam  Fax: +31.20.5354445
The Netherlands        The Netherlands    Mobile: +31.6.55861746
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1160438400 + 381600 = 1160820000.