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End-to-End QoS Network Design: Quality of Service for Rich-Media & Cloud Networks, Second Edition by Kenneth Briley Jr., Robert Barton, Christina Hattingh, Tim Szigeti

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Chapter 15. Campus Distribution (Cisco Catalyst 4500) QoS Design

The primary role of quality of service (QoS) in the campus distribution switch is to manage packet loss. Therefore, the distribution switch should trust differentiated services code point (DSCP) markings on ingress (as these have been previously set by access-edge switches) and perform both ingress (if required and supported) and egress queuing, as illustrated in Figure 15-1.

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Figure 15-1 Campus Distribution Switch Port QoS Roles

The Cisco Catalyst 4500E Supervisor 7-E is a platform well suited to the role of a campus distribution switch and therefore is featured in this design chapter. ...

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