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August 2009, Week 3

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Subject:
Re: 918/LX network problem
From:
Jeff Kell <[log in to unmask]>
Reply To:
Jeff Kell <[log in to unmask]>
Date:
Mon, 17 Aug 2009 14:47:36 -0400
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Johnson, Tracy wrote:
> I like what Jeff says here, how much youtube are your folks watching on
> this switch while waiting to Xmit?

YouTube is largely flash over HTTP, port 80, TCP.  It is relatively
well-behaved in this scenario, unless your users have configured some
crazily-large TCP windows and YouTube even supports a large-ish window. 
TCP only allows a few, at most, outstanding ACKs per connection.

Streaming UDP is things like H.323, Skype, some Peer-to-Peer
(Gnutella/Gnucleus, eDonkey, Blubster/Picolet, newer encrypted
BitTorrent), Syslog traffic, etc.

Jeff

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