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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28 Chapter 1: Quality of Service: An Overview
• A class called Customer-D will get AF41, AF42, and AF43 traffic.
For each customer, an ingress policer marks the traffic based on the rate of the traffic. Up
to 256 kbps is marked AFx1, above 256 kbps but below 768 kbps is marked AFx2, and
above 768 kbps is marked AFx3. During periods of congestion, this traffic is placed into the
classes described earlier as it egresses the aggregation router toward other regions. Because
each class of traffic is independently forwarded, and each class is guaranteed a certain
amount of bandwidth (using CBWFQ), the classes do not interfere with each other in any way
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