June 2003
Intermediate to advanced
432 pages
15h 56m
English
book
Cisco Catalyst QoS: Quality of Service in Campus Networks
by Mike Flannagan - CCIE® No. 7651, Richard Froom - CCIE No. 5102, Kevin Turek - CCIE No. 7284
Content preview from Cisco Catalyst QoS: Quality of Service in Campus Networks
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370 Chapter 9: QoS Support on the Catalyst 6500 MSFC and FlexWAN
Congestion Avoidance
The purpose of congestion avoidance is to avoid congestion from occurring at bottlenecks
within the network. This avoidance is accomplished by proactively managing transmit
queues. Congestion avoidance mechanisms are specifically targeted for TCP-based appli-
cations. TCP uses flow-control mechanisms to manage established communication
sessions. As a result, drops in the network impact TCP sessions; drops are indicators of
congestion. Unfortunately, UDP traffic does not employ any flow-control mechanisms at
the protocol level; therefore traffic is not throttled as ...
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I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.