All things related to multicast

[Ryan Harden <>]

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We saw an increase of about 1Gbps or so over normal levels for that time
of day. Almost all of it was CNN's feed. A couple other sources showed
up in there too. We didn't have any 'pain' in any of our equipment. We
did get some fun looking graphs though. :)

Unfortunately even though we have good multicast connectivity to
Internet2, no one used it. Our traffic characterization tools didn't
show anything over baseline.

/Ryan

Bill Owens wrote:
> On Fri, Jan 23, 2009 at 04:09:53PM -0600, Julian Y. Koh wrote:
>> Now, we had definite pains on some of our external traffic due to the
>> Octoshape P2P streaming that CNN was employing, but luckily we already had
>> our multicast traffic bypassing the equipment that was hurting.  Otherwise
>> life would have been not so good for us.  As it was, the pain that people
>> were experiencing with the unicast streams (and I'm including the Octoshape
>> streams there as well) is going to serve as a good leverage for publicizing
>> the multicast-based services.
> 
> It would have been bitterly ironic if the all-but-unannounced P2P 
> pseudo-multicast traffic had interfered with the one high-grade multicast 
> feed that was available to us. 
> 
> We saw unicast traffic peaks at almost 1.2 Gbps on our egress connections, 
> with several campuses maxing out their connections, all attributable to 
> Octoshape (since NYSERNet doesn't provide transit to any commercial 
> streaming sources). I'm glad that the network was used, but I do wish that 
> they could come up with something a bit smarter.
> 
> Bill.

- --
Ryan M. Harden, BS, KC9IHX              Office: 217-265-5192
CITES - Network Engineering             Cell:   630-363-0365
2130 Digital Computer Lab,              Fax:    217-244-7089
1304 W. Springfield                     email:  

Urbana, IL  61801                       

         University of Illinois - Urbana/Champaign
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